Consider the following statements: 1. Cells use Deoxyribonucleic Acid (DNA) as a blueprint to make messenger RNA (mRNA). 2. DNA editing makes permanent changes to a person’s genetic code, while RNA editing makes temporary changes. 3. ADAR (Adenosine Deaminase Acting on RNA) technique is used in RNA editing. Which of the statements given above are correct? |ForumIAS

Q. Consider the following statements:
1.Cells use Deoxyribonucleic Acid (DNA) as a blueprint to make messenger RNA (mRNA).
2.DNA editing makes permanent changes to a person’s genetic code, while RNA editing makes temporary changes.
3.ADAR (Adenosine Deaminase Acting on RNA) technique is used in RNA editing.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D

Notes:

Explanations –

Statements 1, 2 and 3 are correct. Cells use DNA as a template to synthesize mRNA in a process called transcription. The mRNA then carries the genetic instructions from DNA to produce proteins. DNA editing results in permanent changes to the genome, while RNA editing is temporary, allowing the effects to fade over time. The ADAR enzyme is used in RNA editing by converting adenosine in mRNA to inosine, which helps correct errors in mRNA sequences.

Source: The Hindu

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