Question

Purines found both in DNA and RNA are

• A. Cytosine and thymine
• B. Adenine and thymine
• C. Adenine and guanine
• D. Guanine and cytosine

Answer 1

The correct option is C

Adenine and guanine

The correct option is C.

Explanation of correct option:

1. Purines are known as one of the building blocks of DNA and RNA molecules.
2. Names of purine bases that are common in DNA and RNA are adenine and guanine.

Explanation of incorrect options:

Option A:

1. Cytosine and thymine are the names of pyrimidine bases.
2. Thymine is only found in DNA molecules.

Option B:

1. Thymine is one of the pyrimidine bases.
2. It is found only in DNA molecules, not in RNA.
3. Instead of thymine, uracil in present in the RNA.

Option D:

1. Cytosine is not a purine base.
2. It is a pyrimidine base found in both DNA and RNA.

Final answer: Purines found both in DNA and RNA are adenine and guanine.