Question

A single-celled organism is represented in the diagram shown below. An activity is indicated by the arrow. Which substance is the main energy source needed to perform this process? a ATP b Photosynthesis c DNA d Enzyme

Answers

GPT-4o mini
The main energy source needed to perform cellular processes in single-celled organisms is typically **a) ATP (Adenosine triphosphate)**. ATP serves as the primary energy currency of the cell, providing the energy required for various cellular activities.

- **b) Photosynthesis** refers to the process by which certain organisms convert light energy into chemical energy, but it is not the energy source itself.
- **c) DNA** is involved in genetic information and replication but does not serve as an energy source.
- **d) Enzymes** are catalysts that speed up biochemical reactions but do not provide energy by themselves.

Therefore, the correct answer is **a) ATP**.