Question:
The bases present in DNA are
The bases present in DNA are
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DNA contains adenine, cytosine, guanine, and thymine, whereas uracil is found in RNA.
Updated On: Nov 25, 2025
- adenine, cytosine, guanine and thymine
- adenine, guanine, thymine and uracil
- adenine, cytosine, thymine and uracil
- cytosine, guanine, thymine and uracil
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The Correct Option is A
Solution and Explanation
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.
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.
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