Question

A very important feature of respiration is that it

• A. Liberates energy.
• B. Provides $O_2$.
• C. Utilizes $C{O}_2$.
• D. Synthesizes complex compounds.

Answer 1

The correct option is A Liberates energy.

In all living organisms including plants energy is released by the process of respiration. Respiration is chemically an oxidative process in which reduced substrates (carbohydrates, fats and amino acids) are oxidised and energy is released. Energy is required for the synthesis of reduced substrates. This energy input is done by solar energy during the process of photosynthesis, whereas energy stored in reduced substrates is released during respiration process.