Question

Which is the correct option for the labelled part (a), (b) and (c) in given figure?

• A. a = E.coli
  b = RNA
  c = Glycosidic bond
• B. a = Plasmid
  b = B chain
  c = Disulfide bond
• C. a = E.coli
  b = B chain
  c = Disulfide bond
• D. a = Plasmid
  b = RNA
  c = Disulfide bond

Answer 1

Answer: (B)

a = Plasmid

b = B chain
c = Disulfide bond
The given diagram represent the synthesis of insulin molecule by the process of recombinant DNA technology. In this, the desired gene is inserted into the plasmid (a). The plasmid is then transferred into E. coli. The desired gene is expressed and A and B chain (b) are produced. Once, the chains are synthesized, A and B chains are linked together by two disulfide bonds (c).

Thus, the correct answer is 'a = Plasmid; b = B chain; c = Disulfide bond.'