Given below are two statements (A and B) each with two blanks.
Select the option which correctly fill up the blanks in two statements - Statements :
A. Use of radioactive thymidine to detect distribution of newly synthesised DNA in the chromosomes was performed on Vicia faba (faba beans) by ____1____ and colleagues in 1958. The experiment proved that the DNA in chromosomes also replicates ____2____.
B. The chemical method developed by Har Gobind Khorana was instrumental synthesising RNA molecules with defined combinations of bases (homopolymers and copolymers). ___1___ cell-free system for protein synthesis finally helped the code to be deciphered. Severo Ochoa enzyme (polynucleotide phosphorylase) was also helpful in polymerising RNA with defined sequence in a ____2____ independent manner (enzymatic synthesis of RNA).
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