Question

Which of the following statements about DNA is not correct?

• A. It has a double helix structure
• B. Adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine
• C. The two strands in a DNA molecule are not complementary to each other
• D. It contains the pentose sugar, 2 - deoxyribose

Answer 1

Answer: (C)

I. DNA has a double helix structure.



II. Adenine form hydrogen bond with thymine $(A=T$ ) and cytocine forms hydrogen bond with guanine $(C \equiv G)$

III. The two strands in DNA molecules are complementary to each other.

IV. DNA strand contains pentose $-2$ -deoxyribose sugar.