Question

what is the main source of energy for cellular respiration?
a) proteins
b) carbohydrates
c) atp
d) fats

Explanation:

Cellular respiration primarily breaks down carbohydrates (like glucose) to produce ATP, the usable energy currency of cells. Proteins and fats are secondary energy sources used when carbohydrates are scarce, while ATP is the product, not the initial energy source for the process.

Answer:

b) Carbohydrates