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 also accompanied by the release of chemical energy (ATP), so it's an exergonic process also. This is in contrast to photosynthesis, that involves building up biomolecules utilizing energy from the surrounding sources and storing it inside the organic molecules. Therefore photosynthesis is an anabolic and endergonic process whereas respiration is a catabolic and exergonic process.