Question

Which of the following bases are present both in DNA and RNA?

• A. C, D
• B. B, C
• C. A, B
• D. A, C

Hint:

Recall the five main nitrogenous bases and which ones are present in DNA and RNA. Remember that Adenine (A), Guanine (G), and Cytosine (C) are found in both, while Thymine (T) is unique to DNA and Uracil (U) is unique to RNA.

Answer 1

The Correct Option is D

DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are nucleic acids that carry genetic information.
Both DNA and RNA are composed of nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.
There are five main nitrogenous bases: adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U).
The bases present in DNA are adenine (A), guanine (G), cytosine (C), and thymine (T).
The bases present in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U).
Comparing the bases in DNA and RNA, we can see that adenine (A) and cytosine (C) are common to both.
Guanine (G) is also common to both, but it is not shown as an option here.
Thymine (T) is found only in DNA, and uracil (U) is found only in RNA.
Looking at the structures provided: - Structure A is adenine.
- Structure B is thymine.
- Structure C is cytosine.
- Structure D is uracil.
The bases present in both DNA and RNA are adenine (A) and cytosine (C).
Therefore, the correct option is A and C.