Question

Respiration is a:

• A. Catabolic and exergonic process
• B. Catabolic and endergonic process
• C. Anabolic and endergonic process
• D. Anabolic and exergonic process

Answer 1

The correct option is A

Catabolic and exergonic process

Respiration involves the breakdown of complex food materials into simpler molecules. Hence it is a catabolic process. It is accompanied by the release of chemical energy (ATP), so it's an exergonic process also. This is in contrast to photosynthesis which involves building up of biomolecules utilizing energy from the surrounding sources and storing it inside the organic molecules. Therefore photosynthesis is an anabolic process and endergonic process.