Practice Test


Q1) Iron is mainly absorbed in Show Answer


Q2) Micronutrients are those elements Show Answer


Q3) Which of the following micronutrients can be absorbed by foliage? Show Answer


Q4) Which of the following elements are not absorbed from soil? Show Answer


Q5) Which of the following is a component of chlorophyll? Show Answer


Q6) One of the ways in which the nitrogen of atmosphere is converted into nitrate for plants is by the action of Show Answer


Q7) The most abundant element in plant is Show Answer


Q8) Minerals of soil are derived from Show Answer


Q9) Trace elements are Show Answer


Q10) Pre-mature leaf-fall is caused due to deficiency of Show Answer


Q11) The chlorophyll is not formed without Show Answer


Q12) Micronutrients Show Answer


Q13) Woodward (1669) observed that plants grow better in muddy water than in rain water because Show Answer


Q14) Who gave the criteria of essentiality? Show Answer


Q15) Which one of the following elements is essential for photolysis of water? Show Answer


Q16) Which one of the following plants cannot fix atmospheric nitrogen directly? Show Answer


Q17) In nitrogen cycle, nitrite is converted to nitrate by Show Answer


Q18) Plants absorb mineral salts from the soil solution through Show Answer


Q19) Deficiency of iron causes Show Answer


Q20) Chlorosis occurs when plants are grown in Show Answer


Q21) Which of the following elements is involved in nitrogen metabolism in reduction of nitrates? Show Answer


Q22) The mineral constituent of the cell wall is Show Answer


Q23) Active uptake of minerals by roots mainly depends on the Show Answer


Q24) White bud in maize indicates acute deficiency of Show Answer


Q25) Which of the following would not make minerals more available to plants? Show Answer


Q26) Synthesis of IAA requires Show Answer


Q27) Which of the following is common to ferredoxin and cytochrome? Show Answer


Q28) Most of the minerals as inorganic form are transported through Show Answer


Q29) Mass flow hypothesis explains transport of Show Answer


Q30) Which of the following does not required carrier molecules during transport through cell membranes? Show Answer


Q31) In a citrus plantation, all the plants were found to be suffering from the die-back disease and spraying of fungicides was of no help. This problem was due to the deficiency of Show Answer


Q32) Which of the following is most limiting factor for nitrification in the soil? Show Answer


Q33) Active transport of molecules from outside to inside across a membrane requires Show Answer


Q34) If chlorophyll is burnt, what will be left? Show Answer


Q35) Deficiency of molybdenum causes Show Answer


Q36) Which one of the following element plays an important role in biological nitrogen fixation? Show Answer


Q37) Photolysis of water is increased by Show Answer


Q38) Which of the following adaptations would not be seen in carnivorous plants? Show Answer


Q39) Which of the following essential mineral elements is not a constituent of any enzyme, but stimulates the reactions of many enzymes? Show Answer


Q40) Chlorosis, etiolation and albinism are caused by deficiency of Show Answer


Q41) Ammonium sulphate is a Show Answer


Q42) For normal growth of plants one of the following is not required Show Answer


Q43) Nitrogen from the atmosphere is obtained by plants in the form of Show Answer


Q44) Which one of the following can fix atmospheric nitrogen directly? Show Answer


Q45) Mg and Fe are required by the plants for the Show Answer


Q46) The non-essential element in plant is Show Answer


Q47) An example of anaerobic nitrogen fixing saprophytic bacterium is Show Answer


Q48) Organisms which fix free nitrogen in soil are Show Answer


Q49) Nodules with nitrogen fixing bacteria are present in roots of Show Answer


Q50) Members of bean family are particulary important for rotation of crop Show Answer


Q51) Nitrogen is an essential component of Show Answer


Q52) Mineral matter in soil is due to Show Answer


Q53) Which is a micronutrient? Show Answer


Q54) Minerals are absorbed by roots through mainly by Show Answer


Q55) Which of the following elements can plant take directly from air? Show Answer


Q56) Chlorosis in plants occurs due to Show Answer


Q57) Hydroponics is Show Answer


Q58) Non-essential element for proper growth of plant is Show Answer


Q59) Nitrogen is usually absorbed by the plant in the form of Show Answer


Q60) Insectivorous plants can grow well in a soil deficient in Show Answer


Q61) Without essential mineral nutrients leaves of many plants turn yellow because of Show Answer


Q62) Which element is essential as electron carrier? Show Answer


Q63) Hydroponics is also called as Show Answer


Q64) In the nodules of roots in leguminous plants, we find Show Answer


Q65) Which of the following is obligate stem parasite? Show Answer


Q66) Which of the following is a partial root parasite? Show Answer


Q67) Pick up the saprophytic angiosperm Show Answer


Q68) Helotism is master and slave relationship found in Show Answer


Q69) Insectivorous plant, Nepenthes is also known as Show Answer


Q70) The traps of carnivorous plants contain Show Answer


Q71) Which of the following formulae describes nitrogen fixation? Show Answer


Q72) Mineral uptake by a terrestrial plant is limited by insufficient Show Answer


Q73) Plants that have mutualistic relations with nitrogen fixing bacteria provide the bacteria with Show Answer


Q74) The nodule in a palnt root where nitrogen-fixing bacteria live forms from cells of the Show Answer


Q75) Plants, such as clover and beans, that have nitrogen-fixing bacteria in their roots are in which of the following families? Show Answer


Q76) Contact exchange of ions occurs Show Answer


Q77) Bacteria that fix nitrogen for such plants as clover and beans are in which of the following genera? Show Answer


Q78) Salt repiration is Show Answer


Q79) Which of the following plants will enrich the soil with nitrogen? Show Answer


Q80) Organisms that fix nitrogen in aquatic habitats are Show Answer


Q81) 'Grey-Speck' disease is caused by the deficiency of Show Answer


Q82) The need of individual plants for any particular element is normally defined in terms of Show Answer


Q83) Available form of nitrogen to plants is Show Answer


Q84) Black necrosis of stem and root tip is caused by the deficiency of Show Answer


Q85) Nitrogen fixation by organisms requires conditions that are Show Answer


Q86) Molybdenum is involved in Show Answer


Q87) Nitrogen fixation by bacteria requires the enzyme Show Answer


Q88) The conversion of ammonia to ammonium occurs Show Answer


Q89) Plants that have mutualistic relations with nitrogen fixing bacteria receive from the bacteria Show Answer


Q90) An association between a fungus and a root of higher plant is termed as mycorrhiza which is an example of Show Answer


Q91) Which of the following groups of plants can grow in nitrogen deficient soils? Show Answer


Q92) Which one of the following is an obligate stem parasite? Show Answer


Q93) Nodulation of legumes is reduced in deficiency of Show Answer


Q94) A protoplasmic element is Show Answer


Q95) A balancing element is Show Answer


Q96) The soluble resources of phosphorus and nitrogen in soil generally get depleted because they are usually found as Show Answer


Q97) At times of heavy rain, minerals in upper layers of the soil are moved downward by a process known as Show Answer


Q98) Bidirectional translocation of minerals takes place through Show Answer


Q99) The movement of mineral ions into plant root cells as a result of diffusion is called Show Answer


Q100) Function of Mg and Fe is Show Answer


Q101) Which of the following is macronutrient? Show Answer


Q102) Which of the folloiwng is trace element? Show Answer


Q103) The brown colour of leaves of cabbage is due to the deficiency of Show Answer


Q104) In fruit trees a disease exanthema is caused by the deficiency of Show Answer


Q105) The role of inorganic nutrients in plant growth was at first indicated by Show Answer


Q106) The essential nutrient element required by plants in the least quantity is Show Answer


Q107) The essential element for the synthesis of auxin is Show Answer


Q108) The most important element associated with protoplasm and proteinaceous material of plant is Show Answer


Q109) Enzyme catalyzed reactions can be inhibited by Show Answer


Q110) Permeability of protoplasm is accelerated by Show Answer


Q111) Which of the following is not essential for plant growth? Show Answer


Q112) Which of the folloiwng nutrient elements is most important for protein synthesis? Show Answer


Q113) Which of the folloiwng is not major element? Show Answer


Q114) Zinc is essential for Show Answer


Q115) Presence of phosphorus Show Answer


Q116) Ash is of what significance in the study of mineral nutrition of plants? Show Answer


Q117) The presence of an element in plant ash Show Answer


Q118) In plants a common symptom caused by deficiencies of P, K, Ca and Mg is Show Answer


Q119) That the energy of metabolism is used in uptake of ions is demonstrated by Show Answer


Q120) Ion uptake is called active because Show Answer


Q121) The efflux of ions from the cell is enhanced by Show Answer


Q122) Micronutrient absorbed by foliage is Show Answer


Q123) Nitrogen absorbed by plants is Show Answer


Q124) Sand culture is a component of Show Answer


Q125) Inorganic nutrients are present in the soil as Show Answer


Q126) Clay and organic matter of the soil have negative charges. They attract positively charged ions like Show Answer


Q127) Which of the followng is required by plants for the formation of ATP? Show Answer


Q128) Magnesium is important component of Show Answer


Q129) Plants use Zinc as Show Answer


Q130) Plants growing in urea sprayed but Mg deficient soil will show Show Answer


Q131) ATP molecules combine with carrier molecules and allow passage of substances Show Answer


Q132) Enzyme first used for nitrogen fixation Show Answer


Q133) This is an insectivorous plant Show Answer


Q134) Which of the following is non-symbiotic? Show Answer


Q135) Trace element in plants is Show Answer


Q136) Which of the following element is essential for nitrogoen metabolism in plants? Show Answer


Q137) Plants absorb nitrogen in the form of Show Answer


Q138) Which element is located at the center of the porphyrin ring in chlorophyll? Show Answer


Q139) The major role of minor elements inside living organisms is to act as Show Answer


Q140) Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone Show Answer


Q141) The most abundant element found in plants in Show Answer


Q142) Yellowish edges appear in leaves deficient in Show Answer


Q143) Microelements function as Show Answer


Q144) Element required for biological nitrogen fixation is Show Answer


Q145) Copper is activator in enzyme Show Answer


Q146) If by radiations all the nitrogenase enzymes are inactivated, then there will be no Show Answer


Q147) The ability of the Venus Flytrap to capture insects is due to Show Answer


Q148) All of the following statements concerning the actionmycetous filamentous soil bacterium Frankia are correct EXCEPT that Frankia Show Answer


Q149) If there is deficiency of micronutrients that not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport Show Answer


Q150) Prolonged liberal irrigation of agricultural fields is likely to create the problem of Show Answer


Q151) The deficiencies of micronutrients, not only affect growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below which group of three elements shall affect most both photosynthetic and mitochondrial electron trasport? Show Answer


Q152) Which is essential for root hair growth? Show Answer


Q153) Sulphur is an important nutrients for optimum growth and productivity in Show Answer


Q154) A plant required magnesium for Show Answer


Q155) Which one of the following elements is not an essential micro-nutrient for plant growth? Show Answer


Q156) The function of leghaemoglobin in the root nodules of legumes is Show Answer


Q157) Plants absorb large number of minerals from the soil. Out of over 105 elements discovered, so far, how many are essential for plant growth and metabolism? Show Answer


Q158) Macronutrients must generally be present in plant tissue in concentration of Show Answer


Q159) Which of the following is a set micronutrients for plants required in small amount of about 0.1 mg per gm of dry matter? Show Answer


Q160) Which of the following statements is incorrect? Show Answer


Q161) Nitrogen is required by plants in greatest amount. It is one of the major constituents of proteins, nucleic acids, vitamins and hormones. It is absorbed as Show Answer


Q162) Deficiency of phosphorus in plants causes Show Answer


Q163) Movement of ions from soil to plants require energy and is termed Show Answer


Q164) The ion channels are Show Answer


Q165) Mineral nutrients absorbed by root are carried to xylem by which pathway? Show Answer


Q166) Mineral salts are translocated through xylem in the plants was proved by Show Answer


Q167) Nitrites into nitrates conversion is done by Show Answer


Q168) The approximate percentage of nitrogen fixed biologically is Show Answer


Q169) The Rhizobia are Show Answer


Q170) The nitrate reduction and nitrite reduction occurs respectively in Show Answer


Q171) Calcium is essential for maintaining permeability of cell membrane but which one if called balancing element? Show Answer


Q172) The main respons of boron deficiency is visible in Show Answer


Q173) Enzyme nitrogenase is responsible for Show Answer


Q174) Plants growing near the nuclear test sites take up and accumulate which of the following elements? Show Answer


Q175) Name the minerals responsible for maintaining cation-anion balance in the plant cells Show Answer


Q176) What is the major function of air stone? Show Answer


Q177) In hydroponic vegetables, the pH preferred by most vegetable is slightly Show Answer


Q178) Which of the following are considered as the roles of iron (Fe) in plants?
I. Important constituent of cytochrome
II. Activator of catalase
III. Essential for chlorophyll synthesis
Choose the correct option Show Answer


Q179) By applying which of the following practices, contamination of hydroponics plants can be reduced? Show Answer


Q180) An essential element is that which Show Answer


Q181) Essential elements perform many functions which includes
I. Permeability of the cell membrane
II. Maintenance of osmotic concentration of the cell sap
III. Major constituents of macromolecules and coenzymes
IV. Buffering action
Choose the correct option Show Answer


Q182) Which of the following metals causes harmful effects? Show Answer


Q183) Nitrogen is mainly absorbed in the form of Show Answer


Q184) In the initial phase of minerals absorption ions are taken up Show Answer


Q185) Which of the following is true regarding manganese toxicity in plants? Show Answer


Q186) Sulphur is found as a constituent in which of the following amino acids? Show Answer


Q187) What is the key principle of the EBB and flow system in hydroponics? Show Answer


Q188) Hydroponics has been successfully employed as a technique for which of the following vegetables? Show Answer


Q189) For the uptake of ions in the second phase of absorption of minerals, the pathway followed is called Show Answer


Q190) How many essential mineral elements have been discovered yet? Show Answer


Q191) Which of the following is a rootless aquatic plant in which a portion of the leaf forms a tiny sac for
trapping insects? Show Answer


Q192) Which of the given options are correct for hydroponics? Select the correct pair
I. Hydroponics technique is useful in areas having infertile and dry soils
II. Hydroponics can regulate pH optimum for a particular crop
III. It increases the labour cost
IV. It increases the problem of weeding Show Answer


Q193) Insectivorous plants eats the insect for Show Answer


Q194) Aeroponics are Show Answer


Q195) Insectivorous plants eats insects for their requirement of Show Answer


Q196) Molybdenum is the essential constituent of Show Answer


Q197) Select the correct statement. Show Answer


Q198) Which among the following are used as media for hydroponics? Show Answer


Q199) The core metal of chlorophyll is Show Answer


Q200) Identify the elements which functions as the components of biomolecules
I. Hydrogen II. Magnesium
III. Oxygen IV. Nitrogen Show Answer


Q201) Potassium is required by which of the following regions of plants
I. Meristematic tissues II. Buds
III. Leaves IV. Root tips Show Answer


Q202) In root nodules of legumes, leghaemoglobin is important because it Show Answer


Q203) The number of essential elements known for the growth and reproduction of plants is Show Answer


Q204) Which of the following minerals activate the enzymes involved in respiration? Show Answer


Q205) Which of the following is not caused by deficiency of mineral? Show Answer


Q206) Crop rotation is used by farmers to increase Show Answer


Q207) The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in
leguminous root nodule is Show Answer


Q208) Soil is able to maintain a regular supply of minerals by the help of which of the following?
I. Slow vegetation
II. Activity of decomposers
III. Soil erosion
IV. Weathering of rocks Show Answer


Q209) Select the match ones.
I Nitrosomonas – Nitrite to nitrate
II Thiobacillus - Denitrification
III Nostoc - Free-living nitrogen-fixer
IV Azotobacter - Anaerobic nitrogen-fixer Show Answer


Q210) In hydroponics, chelating agent is used to Show Answer


Q211) The term ‘outer space’ represents …A…, while ‘inner space’ represents …B… with reference to absorption
of minerals
Identify A and B to complete the given statement Show Answer


Q212) Hydroponic tomatoes may not taste so fresh. Why? Show Answer


Q213) Which of the following is used as a chelating agent in hydroponics? Show Answer


Q214) Sulphur is an important nutrient for optimum growth and productivity in Show Answer


Q215) Which of the following are reservoirs for phosphorus and nitrogen cycle respectively? Show Answer


Q216) The organ in Viscum that absorb nutrients is known Show Answer


Q217) Insectivorous plants live in a soil that is usually deficient in Show Answer


Q218) Humans is essential for plant growth because Show Answer


Q219) Read the functions given below and identify the concerned nutrient
I. Activator of catalase
II. Important constituent of cytochrome
III. Important constituent of proteins involved in ETS
IV. Essential for chlorophyll synthesis Show Answer


Q220) Nitrogen is present in the soil in the form of
I. Nitrates
II. Ammonical salts
III. Nitrite
IV. None of these Show Answer


Q221) The deficiencies of micronutrients not only affects growth of plants but also vital functions, such
as photosynthetic and mitochondrial electron flow. Among the list given below, which group of
three elements shall affect most, both photosynthetic and mitochondrial electron transport? Show Answer


Q222) Which of the following is a bacterium involved in denitrification? Show Answer


Q223) Which of the following is one of the component of ATP? Show Answer


Q224) Hydroponics is a technique of growing plants in a Show Answer


Q225) Which of the following is an example of nutrient in its reduced form? Show Answer


Q226) The source of energy for non-biological nitrogen fixation is Show Answer


Q227) What effect can be seen on the plant growth and reproduction in the absence of essential mineral element? Show Answer


Q228) ‘mottled chlorosis’ on the leaves occurs due to the deficiency of Show Answer


Q229) Maximum percentage of which element occurs in plant ash? Show Answer


Q230) Which one of the following is an amide involved in nitrogen assimilitaion by plants? Show Answer


Q231) Which of the following is considered as partial mineral elements in plants? Show Answer


Q232) Hydroponics is the growth of plants in Show Answer


Q233) The major characteristics of colloids is/are Show Answer


Q234) Mark the statements as true/ false by choosing the correct option from the set (I-IV) given below
I. Magnesium is a constituent of chlorophyll and helps to maintain the ribosome structure
II. Calcium is needed during the formation of mitotic spindle
III. Magnesium is essential for the photolysis of water
IV. Zinc helps in sugar translocation Show Answer


Q235) Free living nitrogen fixing bacteria are Show Answer


Q236) Name the essential element that is considered as the component of energy related to chemical compound
like chlorophyll Show Answer


Q237) What is the correct unit for measuring nutrients in hydroponics nutrient solution? Show Answer


Q238) Which of the following reaction shows nitrogen fixation? Show Answer


Q239) For the limited nitrogen that is present in the soil, microbes compete with Show Answer


Q240) Julius Von Sachs, who demonstrated hydroponics for the first time, was a German Show Answer


Q241) Farmers in a particular region were concentrated that pre-mature yellowing of leaves of a pulse
crop might cause decrease in the yield. Which treatment could be most beneficial to obtain
maximum seed yield? Show Answer


Q242) In the hydroponics plant production technique, in order to obtain the optimum growth, nutrient solutions
must be Show Answer


Q243) Based on the quantitative requirement of elements by the plants, these elements are called Show Answer


Q244) The number of essential nutrients needed in plants is Show Answer


Q245) One of the following is called pitcher plant Show Answer


Q246) Minerals involved in redox reactions in plant cells are Show Answer


Q247) The conversion of nitrate to nitrogen is called Show Answer


Q248) Enzyme required for nitrogen fixation is Show Answer


Q249) For the proper management of diseased conditions in hydroponics, it is important to Show Answer


Q250) Which of the following statements are not correct in reference to hydroponics?
I. It determines the mineral nutrients essential for the plants
II. The hydroponics involves the culture of plants in a soil with, defined mineral solution
III. Hydroponics requires purified water with non-defined mineral nutrient salts
IV. In the hydroponics technique, plants are grown in sandy soil with nutrient solution
V. By this method, essential elements required for the growth of plants can be identified and their
deficiency symptoms can also be discovered
Choose the correct options Show Answer


Q251) Quantity of macronutrients that is generally found in plant is Show Answer


Q252) Who proved for the first time that the plants contain a large number of minerals and
microelements? Show Answer


Q253) The optimum temperature preferred for the plant growth is Show Answer


Q254) Which of the following elements is not an essential micronutrient for plant growth? Show Answer


Q255) Which of the following gene is responsible for biological nitrogen fixation? Show Answer


Q256) Hydroponics are of three types …A…, a film system and …B…
Choose the correct pair from the option given below Show Answer


Q257) Deficiency of which to the following can cause yellowing of intravenous regions of leaves? Show Answer


Q258) The technique of growing plants in a nutrient solution in the complete absence of soil is called Show Answer


Q259) Who demonstrated the concept of hydroponics for the first time? Show Answer


Q260) Appearance of yellowish edges in the leaves is due to deficiency of Show Answer


Q261) VAM is Show Answer


Q262) Nitrogen is required mainly by which of the following parts of the plants?
I. Meristematic tissues
II. Differentiating tissues
III. Apical tissues
IV. Metabolically active cell
Choose the correct option Show Answer


Q263) Choose the correct options Show Answer


Q264) Macronutrients like carbon, hydrogen and oxygen are obtained mainly from Show Answer


Q265) For a seed to germinate, the most important thing needed is Show Answer


Q266) The entry and exit of ions to and from the symplast requires the expenditure of Show Answer


Q267) A plant requires magnesium for Show Answer


Q268) Which element is required for the germination of pollen grains? Show Answer


Q269) The area around the plant roots is called Show Answer


Q270) The ultimate source of nitrogen is Show Answer


Q271) Select from the given options, which is the most commonly obtained commercial flower crop in
hydroponics? Show Answer


Q272) Which one of the following elements in plants is not remobilised? Show Answer


Q273) The plant ash indicates Show Answer


Q274) The full form of CEA is Show Answer


Q275) In the final phase of mineral absorption, ions are taken up into the …… space of cells Show Answer


Q276) Major disadvantages of hydroponics include Show Answer


Q277) The nutrient solution in flowering culture hydroponics Show Answer


Q278) Which of the following elements can be considered as macronutrients for plants? Show Answer


Q279) The process of decay of dead organic matter is known as Show Answer


Q280) Nitrogen is absorbed by the plants in the form of Show Answer


Q281) Grey spots of oat are caused by deficiency of Show Answer


Q282) A nutritionally wild type organism, which does not require any additional growth supplement is
known as Show Answer


Q283) Which of the following elements is considered as beneficial elements in higher plants? Show Answer


Q284) Which of the following is limiting nutrient for both natural and agricultural ecosystems? Show Answer


Q285) Plant deficient of element zinc, shows its effects on the biosynthesis of plant growth hormone Show Answer


Q286) Julius Von Sachs, who demonstrated hydroponics first, was from Show Answer


Q287) Which of the following is not considered as a trace element (micronutrient) in the plant? Show Answer


Q288) Maximum amount of macronutrients that are generally present in plant tissue is Show Answer


Q289) Which of the following shows the deficiency symptoms of nitrogen in plants? Show Answer


Q290) Which of the following is a macronutrient? Show Answer


Q291) Which of the following statements are correct about mineral absorption in plants? Show Answer


Q292) For the uptake of ions in the first phase of absorption of minerals, the pathway followed is called Show Answer


Q293) Necrosis is the term used for the Show Answer


Q294) Cuscuta is a Show Answer


Q295) Which form of nitrogen enters in the plants Show Answer


Q296) Manganese is required in Show Answer


Q297) Nitrite is coverted to nitrate by Show Answer


Q298) Molybdenum causes Show Answer


Q299) Nitrogen is a constituent of Show Answer


Q300) Necrosis or death if tissue particularly leaf tissue, is due to the deficiency of Show Answer


Q301) The function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is
to Show Answer


Q302) The macronutrient which is an essential component of all organic compounds, yet not obtained
by plants from soil is Show Answer


Q303) The process of transfer of amino group from one amino acid to the keto group of a keto acid is called Show Answer


Q304) What is the correct order of nitrogen assimilation? Show Answer


Q305) Nitrification is the process of conversion of Show Answer


Q306) Which of the following is a nitrogen-fixing organism? Show Answer


Q307) Media, which is used most commonly in hydroponics is Show Answer


Q308) Which of the following gene clusters in bacteria is responsible for nitrogen fixtion? Show Answer


Q309) Anabaena, which is extensively used in rice cultivation, forms symbiotic association with Show Answer


Q310) Nitrates are converted into nitrogen by Show Answer


Q311) The appearance of yellow edges in leaves is due to the deficiency of this mineral element. Show Answer


Q312) Minerals are absorbed by plants in Show Answer


Q313) Which of the following is not an insectivorous plant? Show Answer


Q314) An element playing important role in nitrogen fixation is Show Answer


Q315) Copper is present in Show Answer


Q316) Which of the following is used as an alternative for minerals? Show Answer


Q317) The molecular nitrogen is correctly termed as Show Answer


Q318) The deficiency of this micronutrient results in little leaf disease. Show Answer


Q319) Zn, Mo, Fe, Cu are Show Answer


Q320) Name the technique used by researchers to explore the plant nutrient deficiencies Show Answer


Q321) Bacteria and fungi developing on dead decaying organisms are Show Answer


Q322) Name the elements, which occur in nucleic acid macromolecule? Show Answer


Q323) Enzymes involved in nitrogen metabolism is Show Answer


Q324) Select the incorrect statement Show Answer


Q325) Two nitrogen atoms are joined by Show Answer


Q326) Which of the following is considered to be the best chemical method of fixing atmospheric
nitrogen? Show Answer


Q327) Which of the following elements play a major role in nitrogen metabolism by activating the enzyme,
nitrogenase? Show Answer


Q328) Chlorosis is Show Answer


Q329) On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the
deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves
appeared first in Show Answer


Q330) Choose a true statement regarding essential mineral elements of plants Show Answer


Q331) The insectivorous plants are Show Answer


Q332) In the initial phase of mineral absorption, ions are taken up into the …… space of cells Show Answer


Q333) Absorption of minerals takes place in the form of Show Answer


Q334) A metal ion involved in stomatal regulation is Show Answer


Q335) Find out odd one form the following options by considering its role in nitrogen cycle. Show Answer


Q336) While producing hydroponic plants, which of the following metal is added along with EDTA? Show Answer


Q337) Which one of the following is not a micronutrient? Show Answer


Q338) About 98% of the mass of every living organism is composed of just six element including carbon,
hydrogen, nitrogen, oxygen and Show Answer


Q339) The bladder serving as floats for trapping insects is found in Show Answer


Q340) Which of the following method is close to hydroponics and has the same principle? Show Answer


Q341) Plants uptake minerals present in the soil, mostly through Show Answer


Q342) Boron in green plants assists in Show Answer


Q343) Separation of amino acid and carboxylic groups is called Show Answer


Q344) Addition of chelating agent to hydroponics is necessary for Show Answer


Q345) Which of the following mineral deficiencies will cause death of stem and root tips? Show Answer


Q346) Which among the following is the major constituent of proteins, nucleic acids, vitamins and hormones? Show Answer


Q347) Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing
microorganism? Show Answer


Q348) ‘Khaira disease of rice’ is due to Show Answer


Q349) Which one of the following is a micronutrient in plants? Show Answer


Q350) In which of the following conditions, plants cannot be grown? Show Answer


Q351) One of the major function of essential elements is Show Answer


Q352) Efflux is the movement of ions Show Answer


Q353) If by radiation all nitrogenase enzymes are inactivated, then there will be no Show Answer


Q354) The process of conversion of nitrogen to ammonia is termed as Show Answer


Q355) Identify the non-leguminous plants that forms nodules to fix nitrogen Show Answer


Q356) The minerals involved in water-splitting reaction during photosynthesis are Show Answer


Q357) Nitrifying bacteria Show Answer


Q358) Micronutrients are Show Answer


Q359) A small aquatic plant was put in each of the petri dishes- X, Y and Z, containing different culture
solutions. After six weeks, the plant in dish-X had the same number of leaves as it had previously
and were all small and yellowish. Plant in dish-Y had more leaves of normal size and dark green
colour. Plants in dish-Z had more leaves of normal size but very pale. Which of the following show
the elements missing the culture? Show Answer


Q360) Essential ions are absorbed in different amounts by Show Answer


Q361) Which of the following is/are not an essential micro nutrient? Show Answer


Q362) For the existence of nitrogen, how many nitrogen atoms are required? Show Answer


Q363) In the final phase of mineral absorption ions are taken up Show Answer


Q364) Which of the following statement is true about the passive uptake of ions? Show Answer


Q365) Active transport of ions by the cell requires Show Answer


Q366) If the size of fruits diminishes in plants, which mineral ion should be added to soil? Show Answer


Q367) Mineral element required by plants in the greatest amount is Show Answer


Q368) Premature leaf fall is due to deficiency of Show Answer


Q369) An element must be considered essential, when
I. the element is necessary for supporting normal growth and reproduction of the plants
II. the deficiency of that particular element can not be met by supplying some other element
III. the element is directly involved in the metabolism of the plants. Choose the correct pair Show Answer


Q370) Soilless culture helps in knowing Show Answer


Q371) Chlorosis is caused due to deficiency of Show Answer


Q372) I. The practice of growing plants in nutrient enriched water without soil is called ….
II. The system of growing plants with their roots bathed in nutrient mist (a cloud of moisture in air) is
called…..
Complete the given statement (I and II) with the correct pair of options given below Show Answer


Q373) A plant which lives on another plant but do not take food or anything from plant is called Show Answer


Q374) In addition to known essential elements, there are some beneficial elements. These are required by the Show Answer


Q375) For nitrogen fixation, useful pigment is Show Answer


Q376) Fe can be taken by plants in the form of Show Answer


Q377) Necrosis in crops is due to the deficiency of Show Answer


Q378) Hydroponics were first time demonstrated in the year Show Answer


Q379) Which element is located at the centre of the porphyryin ring in chlorophyll? Show Answer


Q380) The structure present in cynobacteria (BGA) that helping in nitrogen fixation is Show Answer


Q381) Statement 1: Leguminous plants are nitrogen fixers
Statement 2: Leguminous plants have Rhizobium in their root nodules Show Answer


Q382) Statement 1: Some essential elements can alter the osmotic potential of a cell
Statement 2: Osmotic potential can be regulated by potassium Show Answer


Q383) Statement 1: Hydroponics requires purified water mineral nutrient salts
Statement 2: Purified water and mineral salts are always not essential for the growth of hydroponics Show Answer


Q384) Statement 1: Active absorption of minerals is inhibited when the roots are deprived of oxygen
Statement 2: Active absorption of minerals requires expenditure of metabolic energy, which comes
from respiration in the presence of oxygen Show Answer


Q385) Statement 1: Deficiency of sulphur causes chlorosis in plants
Statement 2: Sulphur is a constituent of chlorophyll, proteins and nucleic acids Show Answer


Q386) Statement 1: Activator of the enzyme reductase is manganese
Statement 2: Manganese deficient plants cells prefers ammonia over nitrate Show Answer


Q387) Statement 1: Every plant can grow in a suitable mineral solution only (i.e., without soil)
Statement 2: Hydroponics do not helps in the identification of essential elements and deficiency
symptoms of the plants Show Answer


Q388) Statement 1: Nitrogen-fixing enzyme in legume root nodules functions at low oxygen
concentration.
Statement 2: Low oxygen concentration is provided by leghaemoglobin Show Answer


Q389) Statement 1: Warm nutrient solution is better than cold solution for producing hydroponics
Statement 2: Warm solution holds of greater amount of oxygen than cold solution Show Answer