Q32 / 160 · AP EAMCET 2019 (20 Apr Shift 2) · Chemistry
Which of the following statements about DNA is not correct?
- AIt has a double helix structure
- BAdenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine
- Correct answerCThe two strands in a DNA molecule are not complementary to each other
- DIt contains the pentose sugar, 2-deoxyribose
Solution
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. Thus, option (c) is inorrect.
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. Thus, option (c) is inorrect.
Hence, the correct answer is option: 'C'.