Question

In catabolic series of reaction, complex molecules are broken down into smaller molecules releasing

• A. Water
• B. Energy
• C. Oxygen
• D. Nutrients

Answer 1

Answer: (B)

Catabolic reactions involve breaking down larger and complex molecules into smaller and simpler molecules releasing energy in the process. Anabolic reactions, on the other hand, involves building complex/macromolecules from simple and smaller molecules. The energy that is released is sometimes used to raise the temperature of the cell or it is stored in the form of high energy chemical bonds (e.g. Phosphoanhydride bond in the ATP). Under aerobic conditions, the complete catabolic breakdown of glucose yields energy which is stored in the form of 38 ATPs. So, the correct option is C.