Question

Given below are two statements.
Statement I - RNA acts as biocatalyst and catalytic RNA is ribozyme.
Statement II - Due to repeated replication and mutation, varieties of RNA molecules of varying sizes are formed.
In the light of above statements, select the correct option given below:

• A. Both statement I and statement II are correct.
• B. Both statement I and statement II are incorrect.
• C. Statement I is correct but statement II is incorrect.
• D. Statement I is incorrect but statement II is correct.

Hint:

Catalytic RNA is called a ribozyme, and repeated copying with errors produced many RNA variants.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
In the RNA world view, RNA was the first genetic material and also acted as a catalyst.

Step 2: Statement I
Some RNAs such as the peptidyl transferase of the ribosome and self-splicing introns speed up reactions.
Catalytic RNA is called a ribozyme, so the statement is correct.

Step 3: Statement II
Repeated replication and mutation of early RNA produced many RNA molecules of different sequences and sizes.
So this statement is also correct.

Final Answer:
Both statements are correct. \[ \boxed{\text{(A) }\text{Both statement I and statement II are correct.}} \]