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Q.159) Given below are two statements:

Statement 1: If the RNA world, RNA is considered the first genetic material evolved to carry out essential-life processes. RNA acts as a genetic material and also as a catalyst for some important biochemical reactiotts in living systems. Being reactive, RNA is unstable.

Statement II: DNA evolved from RNA and is a more stable genetic material. Its double helical strands being complementary, resist changes by evolging repairing mechanism. In the light of the above statements, choose the most appropriate answer from the options given below: 

A) Statement P is incorrect but statement II is correct

B) Both statement I and statement II are correct

C) Both statements I and statement II are incorrect

D) Statement Els correct but statement II is incorrect

 

Answers (1)

best_answer

 RNA is believed to be the first genetic material because it can act as both genetic material and catalyst (ribozyme). However, due to its high reactivity, it is unstable.

DNA evolved later and is chemically more stable. Its double-stranded structure and complementary base pairing allow for error correction and repair, making it a better long-term genetic material.

Hence, the correct answer is Option (2).

 

Posted by

Shreya Pandey

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