Question

The bases present in DNA are

• A. adenine, cytosine, guanine and thymine
• B. adenine, guanine, thymine and uracil
• C. adenine, cytosine, thymine and uracil
• D. cytosine, guanine, thymine and uracil

Hint:

DNA contains adenine, cytosine, guanine, and thymine, whereas uracil is found in RNA.

Answer 1

The Correct Option is A

Step 1: Understanding the bases of DNA.
DNA (deoxyribonucleic acid) consists of four nitrogenous bases: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases pair in a specific manner, with adenine pairing with thymine and cytosine pairing with guanine. Uracil (U) is found in RNA, not DNA.

Step 2: Analyzing the options.
- (A) adenine, cytosine, guanine and thymine: This is the correct set of bases found in DNA.
- (B) adenine, guanine, thymine and uracil: Uracil is found in RNA, not DNA.
- (C) adenine, cytosine, thymine and uracil: Uracil is not part of DNA.
- (D) cytosine, guanine, thymine and uracil: Again, uracil is not found in DNA.

Step 3: Conclusion.
The correct answer is (A), as it contains all the correct bases present in DNA.