Question

The primary energy source for animals is

• A. A
• B. B
• C. C
• D. D
• E. E

Answer 1

The correct option is A A

The empirical formula of carbohydrate is C${}_n$(H${}_2$O)${}_n$. In animals, carbohydrate acts as the main energy source. The carbohydrate is broken down to glucose, which enters the metabolic pathways and releases ATP, which is the main energy source. When carbohydrate, is broken down in the absence of oxygen, much less amount of energy is produced.