Practice Test

Q1) "Every cell arises from pre-existing cells". This is the famous generalisation of Show Answer

Q2) A series of changes or sequential events which occur regularly in a dividing cell is called Show Answer

Q3) Cell cycle was discovered by Show Answer

Q4) A cell divides in order to Show Answer

Q5) The cell become viscous and refractive for the first time in Show Answer

Q6) During which phase are proteins for spindle fibers synthesized ? Show Answer

Q7) Cell division of bacteria is Show Answer

Q8) DNA replication takes place in Show Answer

Q9) The stage between two successive mitotic divisions is called as Show Answer

Q10) Restriction point is also called as Show Answer

Q11) Doubling of genetic material takes place is Show Answer

Q12) Chromosomal replication occurs during Show Answer

Q13) The cell may withdraw from cell cycle after mitosis and it will enter into Show Answer

Q14) Cell stops dividing, once it goes to Show Answer

Q15) Histone proteins are synthesized in Show Answer

Q16) S phase of cell division is characterised by Show Answer

Q17) Interphase is considered as a Show Answer

Q18) M phase is also called as Show Answer

Q19) Abnormal, unlimited and uncontrolled cell division results in Show Answer

Q20) ________ is the second phase in cell cycle. Show Answer

Q21) Histones are synthesized in Show Answer

Q22) The cells do not divide further in Show Answer

Q23) In a somatic cell which is ready to divide, the DNA Show Answer

Q24) Synthesis of macromolecules for the formation of cell organelles occurs in Show Answer

Q25) In cell cycle S phase follows Show Answer

Q26) A cell cycle consists of Show Answer

Q27) In a somatic cell cycle Show Answer

Q28) In cells, centrioles occur Show Answer

Q29) During cell cycle RNA and proteins are synthesized in Show Answer

Q30) In which type of cell division does the nuclear membrane remain throughout the division ? Show Answer

Q31) Out of the following, which is called quiescent stage ? Show Answer

Q32) Amitosis is seen in Show Answer

Q33) Important character of amitosis is Show Answer

Q34) The term mitosis was introduced by Show Answer

Q35) Mitosis occurs in Show Answer

Q36) Mitosis is also called as Show Answer

Q37) Equational division is Show Answer

Q38) The shortest phase in the cell cycle is Show Answer

Q39) Old and worn out tissues are replaced due to Show Answer

Q40) The diploid somatic cell divides by Show Answer

Q41) Karyokinesis is Show Answer

Q42) In which type of cell division two identical daughter cells are formed ? Show Answer

Q43) Chromosomes are equally distributed among daughter cells during Show Answer

Q44) Which division is called somatic cell division ? Show Answer

Q45) Which statement is true about mitosis ? Show Answer

Q46) On which part of chromosome, is force exerted at the time of seperation of replicated chromosome ? Show Answer

Q47) Nuclear membrane disappears during Show Answer

Q48) During prophase Show Answer

Q49) Chromosome undergo dehydration and coiling during Show Answer

Q50) Nuclear membrane and nucleolus disappear at Show Answer

Q51) Which part of the cell disappears during mitosis ? Show Answer

Q52) At the end of which stage, do cells under microscope and do not show Golgi bodies, nucleous and nuclear membrane ? Show Answer

Q53) Chromosomes show various shapes during Show Answer

Q54) Which is the longest phase in mitosis ? Show Answer

Q55) What happens in the prophase of mitosis ? Show Answer

Q56) In animal cells, the centriole starts moving in opposite direction, till they occupy polar positions in _______ phase of cell division. Show Answer

Q57) In plant cells, the spindle apparatus is Show Answer

Q58) ________ is characterised by the formation of kinetic spindle. Show Answer

Q59) Chromosomes are arranged on equational plate during Show Answer

Q60) Spindle fibers are attached to chromosomes in the region of Show Answer

Q61) The spindle fibers arises from Show Answer

Q62) Longest stage in M -phase of cell cycle is Show Answer

Q63) Astral rays are formed of Show Answer

Q64) Mitosis is observed in Show Answer

Q65) Spindle formation starts in Show Answer

Q66) Microtubules are involved in Show Answer

Q67) In which stage are chromosomes arranged at the equator ? Show Answer

Q68) The stage of mitosis when the chromosomes move towards the pole is Show Answer

Q69) The shortest phase in mitosis is Show Answer

Q70) Two sister chromatids are attached with Show Answer

Q71) Astral rays are produced from Show Answer

Q72) Separation of chromosomes starts at Show Answer

Q73) Which is NOT TRUE for anaphase of mitosis ? Show Answer

Q74) Nuclear membrane reappers in Show Answer

Q75) Reappearance of nuclear membrane, disappearance of spindle fibers, formation of chromatin network are the characters of Show Answer

Q76) In which phase of mitosis, do disappearance of spindle fibres and reappearance of nucleolus occur ? Show Answer

Q77) In mitosis, the nucleoli reappears during Show Answer

Q78) How many equational divisions are necessary in a cell of onion root tip to form 128 cells ? Show Answer

Q79) The main significance of mitosis is that Show Answer

Q80) What is true about mitosis ? Show Answer

Q81) Spindle fibers are composed of Show Answer

Q82) Division of cytoplasm is called Show Answer

Q83) Karyokinesis is the division of Show Answer

Q84) In animal cell, cytokinesis takes place by Show Answer

Q85) The region of chromosome to which spindle fibres are attached is called Show Answer

Q86) Organelle important in spindle formation during nuclear division is Show Answer

Q87) Growth of organisms takes place due to Show Answer

Q88) Replication of centriole takes place in Show Answer

Q89) The centromere of chromosomes gives rise to a fibre from either side of its surface called as Show Answer

Q90) Anastral mitosis is observed in Show Answer

Q91) The most suitable plant material to study mitosis is Show Answer

Q92) Centromere is a part of Show Answer

Q93) When a unicellular zygote forms multicellular organism, _________ division takes place. Show Answer

Q94) Mitosis of plant and animal differs in Show Answer

Q95) The fibers which extend between the centromeres of daughter chromatids are called Show Answer

Q96) The stage at which cleavage or cytokinesis begins in animal cell is Show Answer

Q97) Which of the following is related with cell division ? Show Answer

Q98) Post-mitotic gap phase is also known as Show Answer

Q99) Meiosis is also known as Show Answer

Q100) Meiosis is associated with Show Answer

Q101) Meiosis has evolutionary significance because it results in Show Answer

Q102) In meiosis haploid condition is maintained by which stage ? Show Answer

Q103) The spindle formation is completed and occupied nuclear region during ______ phase. Show Answer

Q104) In meiosis I, the centromere Show Answer

Q105) The period between meosis I and meosis II is called Show Answer

Q106) When paternal and maternal chromosomes mutually exchange their material in cell division, the event is called Show Answer

Q107) Which event is not associated with prophase I ? Show Answer

Q108) Which one of the following structures will not be common to meiotic cells of higher plants ? Show Answer

Q109) Cell division in sexual reproduction is Show Answer

Q110) In meiosis actual reduction of chromosome takes place in Show Answer

Q111) The longest phase in meiotic division is Show Answer

Q112) Anaphase I differs from anaphase II in Show Answer

Q113) Meiosis term was coined by Show Answer

Q114) The chromosomes are thin and long thread - like during Show Answer

Q115) Process of synapsis is seen is Show Answer

Q116) Pairing of homologus chromosomes is called Show Answer

Q117) Bivalents are formed during Show Answer

Q118) During which phase do chromosomes start length-wise contraction ? Show Answer

Q119) Structure formed in Zygotene stage of meiosis, which helps in crossing over is called Show Answer

Q120) During which sub stages of prophase I of meiosis are bivalents and DNA replication respectively found ? Show Answer

Q121) During which stage of meiosis is synapsis formed ? Show Answer

Q122) During ________ phase, two homologous chromosomes start moving towards opposite poles. Show Answer

Q123) Disjunction is Show Answer

Q124) Seperation of homologus chromosomes at the end of anaphase I is called Show Answer

Q125) During telophase I, Show Answer

Q126) A short resting period between meiosis I and meiosis II is called Show Answer

Q127) Interkinesis is followed by Show Answer

Q128) The complex formed by a pair of synapsed homologous chromonosome is called Show Answer

Q129) Terminalization of chiasmata takes place during Show Answer

Q130) Chiasma formation begins at Show Answer

Q131) Meiotic crossing over involves Show Answer

Q132) Chiastama represents the site of Show Answer

Q133) Crossing over is Show Answer

Q134) When paternal and maternal chromsomes change their materials with each other in cell division, this event is called Show Answer

Q135) Crossing over may results in Show Answer

Q136) Recombination between homologus chromosomes is completed by the end of Show Answer

Q137) During _________ phase chromosomes shorten due to coiling. Show Answer

Q138) Chromosome number is reduced to half during Show Answer

Q139) Exchange of characters between maternal and paternal chromosomes occur during Show Answer

Q140) Zygotic meiosis is found in Show Answer

Q141) Meiosis I separates Show Answer

Q142) The division of centromere in meiosis takes place at Show Answer

Q143) The interphase between meiosis I and meiosis II, when present is called Show Answer

Q144) Meiosis II is similar to Show Answer

Q145) Meiosis of a diploid cell produces Show Answer

Q146) Meiosis is a process in which the chromosome duplicate _________ and cell divides _______. Show Answer

Q147) Meiosis is responsible for Show Answer

Q148) Terminaliztion of chiasmata occurs in Show Answer

Q149) During sexual reproduction, which type of cell division maintains the number of chromosomes ? Show Answer

Q150) Dyads are characteristic of Show Answer

Q151) Which type of cell division takes place in gonads ? Show Answer

Q152) Among different stages of prophase I, which one is the longest ? Show Answer

Q153) Celllular structure which always disappears during mitosis and meiosis is Show Answer

Q154) Gametes contain Show Answer

Q155) The pairing of homologus chromosomes in meiosis is known as Show Answer

Q156) Synaptonemal complex is formed during Show Answer

Q157) How many meiotic divisions are required to produce 200 pollen grains ? Show Answer

Q158) The points of crossing over are known as Show Answer

Q159) How many times does cytokinesis take place during meiosis ? Show Answer

Q160) In which stage do chromosomes appear as thin long threads ? Show Answer

Q161) Chromosome number is restored by Show Answer

Q162) The four daughter cells produced at the end of meiosis are Show Answer

Q163) Diploid chromosome number is 8. What shall be the number of chromatids in each daughter cell after meiosis I ? Show Answer

Q164) The haploid condition is produced by Show Answer

Q165) DNA content is doubled during Show Answer

Q166) Generation time represents period of Show Answer

Q167) The sequence of cell cycle is Show Answer

Q168) Generation time is Show Answer

Q169) How many mitotic divisions are required to form 64 cells from one cell ? Show Answer

Q170) Which of the following represents the best stage to view the shape, size and number of chromosomes ? Show Answer

Q171) Out of the following which is NOT a correct pair ? Show Answer

Q172) If a somatic cell of a plant contains 24 chromosomes, the number of chromosomes present in the gamete will be Show Answer

Q173) Correct sequence of various stages of prophase I is Show Answer

Q174) For the formation of 120 pollen grains how many reduction divisions are required ? Show Answer

Q175) 200 eggs are produced by _______ meiotic divisions. Show Answer

Q176) Which one of the following is the CORRECT pairing with reference to prophase I of meiosis ? Show Answer

Q177) What is the number of chromosome in a diploid organism in which N=12, at the end of meiosis I ? Show Answer

Q178) Number of chromosome groups at the equator of metaphase I of a plant cell, if 2N=60 chromosomes, will be Show Answer

Q179) The second meiotic division leads to Show Answer

Q180) In meiosis, chromosome number becomes Show Answer

Q181) Consider the following statements about plant cytokinesis
I. It usually occurs by cell plate method
II. The spindle usually persists during cytokinesis
III. Cell plate grows centrifugally
Which of the statements given above are correct? Show Answer

Q182) I. …A… phase corresponds to the interval between mitosis and initiation of DNA replication
II. In animal cells, during the …B… phase, DNA replication begins in the nucleus and the centriole duplicates in the cytoplasm
III. During the …C… phase, proteins are synthesized for the preparation of mitosis, while cell growth continues
Identify the blanks (A-C) to complete the given statements (I-III) with reference to NCERT textbook Show Answer

Q183) Which type of cell division helps in regeneration of cells? Show Answer

Q184) Which of the following statement(s) is/are not correct about meiosis?
I. Meiosis involves pairing of homologous chromosomes and recombination between them
II. Two diploid cells are formed at the end of meiosis-II
III. Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I and meiosis-II, but only a single cycle of DNA replication
IV. Meiosis-I is initiated after the parental chromosome replication which produce identical sister chromatids at the S-phase
The correct option is Show Answer

Q185) Crossing over occurs during Show Answer

Q186) During meiosis, the alleles of the parental pair separate or segregated from each other. How many allele(s) is/are then transmitted to a gamete? Show Answer

Q187) The phragmoplast is organized at the Show Answer

Q188) The morphology of chromosomes can be studied most easily in Show Answer

Q189) The number of chromosomes becomes half in Show Answer

Q190) In which of the following phase of cell cycle, mitotic division got arrested? Show Answer

Q191) Which of the following phase of cell cycle is also known as the resting phase? Show Answer

Q192) Differentiated cell remains at which stage? Show Answer

Q193) Choose the correct combination of options to select the correct statement for prophase
I.Chromosomal material condenses to form compact mitotic chromosomes
II.The assembly of mitotic spindle is initiated by the microtubules
III.Cells do not show organelles when viewed under the prophase
IV.The nucleolus or nucleoli degenerate completely Show Answer

Q194) Which of the following event distinguishes prophase-I of meiosis from prophase of mitosis? Show Answer

Q195) During mitosis, number of chromosomes gets Show Answer

Q196) I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II.Nuclear envelope assembles around the chromosome clusters
III.Nucleolus, Golgi complex and ER reform Above features indicates which phase of mitosis Show Answer

Q197) What would be the change in the chromosome number, during S-phase? Show Answer

Q198) Arrange the following events of meiosis in a correct sequence and choose the correct option
II.Crossing over
IV.Disjunction of genomes Show Answer

Q199) What is the approximate percentage duration of cell cycle that comes under interphase in humans? Show Answer

Q200) Which of the following stage of meiosis is responsible for deciding genetic constitution of gametes? Show Answer

Q201) …A…. mitotic cell division is only seen in the diploid somatic cells, while the …B… can show mitotic divisions in both haploid and diploid cells.
Identify A and B form the options given below Show Answer

Q202) In meiosis, the chromosome number Show Answer

Q203) The phase between two successive M-phase is called Show Answer

Q204) At the end of meiosis-II, number of haploid cells formed are Show Answer

Q205) The transition between meiosis-I and meiosis-II is Show Answer

Q206) Synapsis occurs between Show Answer

Q207) In which stage of cell division, chromosomes are most condensed? Show Answer

Q208) Which of the protein is found in spindle fibre? Show Answer

Q209) During cell division, sometimes there will be failure of separation of sister chromatids. This event is called Show Answer

Q210) Which type of chromosomes segregate when a cell undergoes meiosis? Show Answer

Q211) Term ‘meiosis’ was proposed by Show Answer

Q212) Crossing over that results in genetic recombination in higher organisms occurs between Show Answer

Q213) In which of the following stage of the cell cycle, the attachment of spindle fibres to kinetochores of chromosomes occurs? Show Answer

Q214) The sequence of events by which a cell duplicates its genome, synthesizes the other constituents of the cell and eventually divides into two daughter cells is termed as Show Answer

Q215) In animal cell has, cytokinesis involves Show Answer

Q216) Which is correct for meiotic metaphase-I? Show Answer

Q217) Crossing over is the exchange of genetic material between Show Answer

Q218) Which of the following phase of the cell cycle is not a part of interphase? Show Answer

Q219) Colchicine arrests which of the following stage of cell division? Show Answer

Q220) Small disc-shaped structures at the surface of the centromeres that appear during metaphase are Show Answer

Q221) Meiosis in AaBb will produce gametes Show Answer

Q222) The stage between two meiotic division is called Show Answer

Q223) Chromosome number can be doubled by using which of the following? Show Answer

Q224) Dictyotene a is prolonged Show Answer

Q225) Which of the following is unique to mitosis and not a part of meiosis? Show Answer

Q226) During which stage of meiosis, do tetrads line up at the equator? Show Answer

Q227) The anaphase promoting complex is activated by Show Answer

Q228) A cell plate is laid down during Show Answer

Q229) During which stage of meiosis, do the sister chromatids begin to move towards the poles? Show Answer

Q230) In a cell cycle, which structures serves as the site of attachment of spindle fibres? Show Answer

Q231) Which of the following serves as mitotic spindle poison? Show Answer

Q232) Chromosomes are visible with chromatids at which phase of mitosis? Show Answer

Q233) Give the name of the phases of meiosis, in which
I.the chromosome number is reduced to haploid state
II.the amount of DNA is reduced to haploid state The correct option is Show Answer

Q234) What type of cell division takes place in the functional megaspore initially in angiosperms? Show Answer

Q235) Which of the following statements are correct for multicellular cell division?
I.Cell division brings about embryonic development and growth
II.It plays a role in repair and maintenance of the body
III. It is important for reproduction The correct option is Show Answer

Q236) Meiosis involves two sequential cycles of …A… called meiosis-I and meiosis-II but only a single cycle of …B…
Identify A and B to complete the given statement Show Answer

Q237) DNA replicates Show Answer

Q238) Select the correct sequence of a cell cycle Show Answer

Q239) Mitosis or the equational division is usually restricted to …A… cells. However, in some lower plants and in some social insects …B… cells also divide by mitosis.Choose the correct option for A and B from the given options Show Answer

Q240) The spindles are formed of Show Answer

Q241) During mitosis, ER and nucleolus begin to disappear at Show Answer

Q242) The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the Show Answer

Q243) From the following, identify the two correct statements with reference to meiosis
I. Bead-like structures are absent on chromosomes
II. Displacement of chiasmata occurs in diakinesis
III. Separation of two basic sets of chromosomes
IV. No division of centromere The correct option is Show Answer

Q244) Separation of linked genes is called Show Answer

Q245) Sequence of four phases of cell cycle is Show Answer

Q246) The division of the cytoplasm is termed as Show Answer

Q247) Cell would normally proceed to mitosis without interruption Show Answer

Q248) The two chromatids of a metaphase chromosome represent Show Answer

Q249) In the process of mitotic division during interphase, chromosome material remains in the form of very loosely coiled threads called Show Answer

Q250) Which of the following occurs more than one and less than five in a chromosome? Show Answer

Q251) Longest phase of meiosis, is Show Answer

Q252) Crossing over is also an enzyme mediated process and the enzyme involved is called Show Answer

Q253) Which one of the following stages corresponds to Mendel’s law of independent assortment? Show Answer

Q254) Which stages of mitosis is known for occurrence of cytokinesis? Show Answer

Q255) Characteristic of meiosis is Show Answer

Q256) The number of mitotic cell divisions required to produce 256 cells from single cell would be Show Answer

Q257) The second check point in cell cycle occurs at Show Answer

Q258) The M-phase starts with the …A…, corresponding to the separation of daughter chromosomes, known as …B… and usually ends with division of cytoplasm which is known as …C… Identify A-C to complete the given NCERT statement Show Answer

Q259) DNA replication in a cell cycle occurs during Show Answer

Q260) When parental and maternal chromosomes change their material with each other in cell division, this event is called Show Answer

Q261) Which of the following stage is responsible for the appearance of Lampbrush chromosomes? Show Answer

Q262) Chiasmata are most appropriately observed in meiosis during Show Answer

Q263) In which of the following stages, the chromosome is single thin and like long thread? Show Answer

Q264) From the following, identify the two correct statements with reference to meiosis
I.Bead like reference to meiosis
II.Displacement of chaismata occurs in diakinesic
III. Separation of two basic sets of chromosomes
IV. No division of centromere
The correct option is Show Answer

Q265) Which of the following stage of cell cycle is known as quiescent stage? Show Answer

Q266) At which stage of mitosis, chromatids separated and passes to different poles? Show Answer

Q267) When dividing cells are examined under a light microscope, chromosomes become visible in Show Answer

Q268) Phenomenon of crossing over in diploid organisms is responsible for Show Answer

Q269) Karyokinesis refers to the division of Show Answer

Q270) Which of the following statements are correct for cell cycle?
I. Cell cycle is the sequence of events involving growth and division of a cell from the time of its formation to its own division into daughter cells
II. Cell growth (in terms of cytoplasmic increase) is a continuous process
III. DNA synthesis occurs only during one specific stage in the cell cycle
IV. The replicated chromosomes (DNA) are distributed to daughter nuclei during cell division Show Answer

Q271) In which stage of the first meiotic division, two sister chromatids are formed? Show Answer

Q272) Mitosis usually results in the Show Answer

Q273) Which of the following type of cell cycle is known as equational division? Show Answer

Q274) The complete disintegration of nuclear envelope in a cell cycle marks the Show Answer

Q275) Chromosomes are arranged along the equator during Show Answer

Q276) What is the average duration for mitosis? Show Answer

Q277) When synapsis is complete all along the chromosome, the cell is said to have entered a stage called Show Answer

Q278) ‘XX’ is a phase of mitosis, in which the chromatin condenses into discrete chromosomes. During ‘XX’ phase, nuclear envelope breaks down and spindles forms at opposite ends of the cell.Identify ‘XX’ Show Answer

Q279) Mitosis is divided into Show Answer

Q280) Which of the following statements (events) is/are true for mitotic telophase? Show Answer

Q281) Identify A-C in the given statements, and choose the correct option
I. Spindle microtubules that extend from the two poles of a dividing cell are called …A…
II. A centromere connects two identical copies of a single chromosomes. These two copies are called …B…
III. In ‘X’ phase, the paired chromosomes separate and begin moving to opposite ends of the cell. This ‘X’ is called …C… Show Answer

Q282) The interphase is divided into three main phases. There phases are Show Answer

Q283) In which of the following stages of the cell cycle chromosome number becomes half? Show Answer

Q284) The proteins involved in the movement of chromosomes towards the poles during cell division are Show Answer

Q285) Which of the following specie’s haploid cell has maximum chromosome counts? Show Answer

Q286) Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle? Show Answer

Q287) Synaptonemal complex is formed during Show Answer

Q288) During cell division, chromosome attaches with spindles Show Answer

Q289) The spindle microtubules are polar, their orientation is Show Answer

Q290) The non-sister chromatids twist around and exchange segments with each other during Show Answer

Q291) Two basic stages of cell cycle are Show Answer

Q292) The S-phase of cell cycle is characterized by Show Answer

Q293) Congression is a phenomenon of Show Answer

Q294) Find the correctly matched pairs and choose the correct option
I. Leptotene – The chromosomes become invisible
II. Zygotene – Pairing of homologous chromosomes
III. Pachytene – Dissolution of the synaptonemal complex takes place
IV. Diplotene – Bivalent chromosomes appear as tetrads
V. Diakinesis – Terminalisation of chiasmata takes place Show Answer

Q295) Meiosis occurs in which of the following cells? Show Answer

Q296) In …A…. phase, there is synthesis of RNAs and proteins that are needed for cell growth and replication of DNA. While it is …B… phase, where synthesis of protein occur that is needed for spindle formation and mitosis to continue.Identify A and B to complete the given statement Show Answer

Q297) Read the following statements and select the correct option
I. M-phase represents the phase when the actual cell division or mitosis occurs
II. Interphase represents the phase between two successive M-phases
III. In the 24 hrs average duration of cell cycle of a human cell, cell division proper lasts for only about an hour
IV.The M-phase lasts more than 95% of the duration of cell cycle Show Answer

Q298) What change would occur in DNA content, during S-phase? Show Answer

Q299) In meiosis, the daughter cells are not similar to that of parent because of Show Answer

Q300) During cell cycle, RNA and non-histone proteins are synthesized in Show Answer

Q301) Alleles of different genes that are on the same chromosome may occasionally separated by a phenomenon known as Show Answer

Q302) In meiosis, division is Show Answer

Q303) Choose the correct answer for the statements given below
I. Protein involved in the shortening and thickening of chromosome fibres
II. The name of early prophase when elongated chromosomes occur in overlapped condition like a ball of wool without their ends being visible
III. Each group of astral rays along with its centriole pair
IV. Name the narrow point which is responsible for attaching two sister chromatids to each other Show Answer

Q304) If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into? Show Answer

Q305) In cell cycle, during which phase chromosomes are arranged at equatorial plate? Show Answer

Q306) When number of chromosomes is already reduced to half in the first reductional division of meiosis, what is the necessity of second meiotic division? Show Answer

Q307) Select the correct option Show Answer

Q308) During meiotic division, the Show Answer

Q309) Recombination is involved in the process of Show Answer

Q310) A diploid living organism develops from zygote by which type of the following repeated cell divisions? Show Answer

Q311) Pick out the correct statements
.I.Synapsis of homologous chromosomes takes place during prophase-I of meiosis. II.Division of centromeres takes place during anaphase-I of meiosis.
III.Spindle fibres disappear completely in telophase of mitosis.
IV.Nucleoli reappear at telophase-I of meiosis. Show Answer

Q312) The term ‘meiosis’ was given by Show Answer

Q313) After the separation of centromeres during mitosis, the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids Show Answer

Q314) In which phase, proteins for spindle fibre are synthesized? Show Answer

Q315) In meiosis-I, a bivalent is an association of Show Answer

Q316) Chiasmata are formed due to Show Answer

Q317) Which of the following shows diplotene stage of cell cycle? Show Answer

Q318) Select the event of cell cycle which shows the importance of synapsis and the formation of chiasmata Show Answer

Q319) Mitosis is a process by which eukaryotic cells Show Answer

Q320) Mitosis is characterized by Show Answer

Q321) Choose the correct sequence of two main events in mitosis Show Answer

Q322) What is the correct sequence of the steps given here? Also work out the process depicted in the steps?
I. Homologous chromosomes move toward opposite poles of the cell; chromatids do not separate.
II. Chromosomes gather together at the two poles of the cell and the nuclear membrances reform.
III. Homologous chromosomes pair and exchanges segments.
IV. Homologous chromosomes align on a central plate.
V. The haploid cells separate completely. Show Answer

Q323) What is the nature of cells formed at the end of meiosis-II? Show Answer

Q324) The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes is Show Answer

Q325) What is the function of centromere? Show Answer

Q326) The cell cycle of yeast takes about Show Answer

Q327) What is not seen during mitosis in somatic cells? Show Answer

Q328) At which stage of cell cycle colchicine arrests the spindle? Show Answer

Q329) Arrange the following events of meiosis in the correct sequence.
2..Crossing over
4.Disjunction of genomes
The correct sequence is

Show Answer

Q330) Spindle fibre is made up of Show Answer

Q331) Diakinesis is marked by Show Answer

Q332) Cleavage is a unique form of mitotic cell division in which Show Answer

Q333) Meiosis occurs in organism during Show Answer

Q334) Chromosome reaches their respective poles in which of the following stages of mitosis? Show Answer

Q335) Replication of centriole occurs during Show Answer

Q336) Genetic recombination is due to Show Answer

Q337) Pick out the correct statements.
I.Mitosis takes place in the somatic cells and meiosis takes place in the germ cells
II. During mitosis, the DNA replicates once for one cell division and in meiosis the DNA replicates twice for two cell divisions.
III. Mitosis and meiosis occur both in sexually and asexually reproducing organisms. Show Answer

Q338) Chromatid formation takes place in Show Answer

Q339) 56 cells are produced in meiosis where first division is Show Answer

Q340) A cell in post reproductive stage remains in Show Answer

Q341) Most cytogenic activities occur during Show Answer

Q342) The term, mitosis was coined by Show Answer

Q343) Which of the following character is related with telophase? Show Answer