The difference(s) between mRNA and tRNA is/are that:

• (i) mRNA has a more elaborate 3 - dimensional structure due to extensive base - pairing
• (ii) tRNA has a more elaborate 3 - dimensional structure due to extensive pairing
• (iii) tRNA is usually smaller than mRNA
• (iv) mRNA bears anticodon but tRNA has codons

A) (i) and (iii)

B) All of these

C) (ii) and (iii)

D) (i), (ii) and (iii)

The differences between mRNA and tRNA are important for understanding their roles in protein synthesis. Here’s a breakdown of the key points:

Key Differences

• 3-Dimensional Structure: tRNA has a more complex three-dimensional structure due to extensive base pairing, while mRNA typically has a simpler structure.
• Size: tRNA is generally smaller than mRNA.
• Codons and Anticodons: mRNA contains codons, which are sequences of three nucleotides that code for amino acids, whereas tRNA has anticodons that pair with these codons during translation.

Correct Answer

Based on the statements provided, the correct choice is C) (ii) and (iii). This is because tRNA has a more elaborate structure due to extensive pairing and is smaller than mRNA. The statement about mRNA bearing anticodons is incorrect, as it is tRNA that has anticodons.