Question

why is rna considered a better candidate for the first life molecule than dna?
rna is only found in humans, making us special.
rna is much stronger and harder to break than dna.
rna is made of proteins, while dna is not.
rna can both store genetic information and perform chemical reactions.

Explanation:

• Option 1: RNA is found in many organisms, not just humans, so this is incorrect.
• Option 2: DNA is more stable (harder to break) than RNA, so this is wrong.
• Option 3: Both RNA and DNA are nucleic acids, not made of proteins, so this is incorrect.
• Option 4: RNA can store genetic info (like DNA) and act as an enzyme (perform chemical reactions), which makes it a better candidate for the first life molecule as early life needed both info storage and catalytic functions.

Answer:

D. RNA can both store genetic information and perform chemical reactions.