Question

The first genes may have developed when ______.

Options

• protobionts grew and divided.

• short RNA strands self-replicated

• DNA molecules produced RNA molecules

• polypeptides became catalytic

Answer 1

The first genes may have developed when short RNA strands self-replicated.

Explanation:

The earliest sign of self-replicating life involved nucleic acids, particularly short RNA chains that could replicate themselves. These RNA molecules likely formed simple genes and acted as both genetic material and catalysts. Over time, these short RNA strands aggregated and evolved into more complex systems, laying the foundation for life.