Question

The left handed form of DNA is called as

• A. A DNA
• B. c DNA
• C. B DNA
• D. Z DNA

Answer 1

Answer: (D)

Z DNA

(A) B-DNA is the most common type of DNA found in the body. The turning off the A DNA and B DNA is towards the right-hand side.
(B) c-DNA is the complementary DNA synthesized from a single-stranded RNA template in a reaction catalyzed by reverse transcriptase enzyme.
(C) The sugar-phosphate backbone forms a zigzag pattern due to the stacking of the bases in the anti- and syn- conformation. In Z- DNA, the minor groove is prominent.

(D) The turning of the Z DNA occurs towards the left-hand side.

So, the correct option is 'Z-DNA'.