MOST COMMON SUBSTRATE USED FOR RESPIRATION
Carbohydrate is the most common respiratory substrate. When the carbohydrate is used as respiratory substrate, the substrate is completely oxidized and the respiratory quotient value is one.
The compounds oxidised during the process of respiration are called respiratory substrates. Carbohydrates, especially glucose, act as respiratory substrates. Fats, proteins, and organic acids also act as respiratory substrates.
Respiration in Plants