Question

Why is glucose called main respiratory substance? ​

Answer 1

Explanation:

In all organisms, glucose is the favoured substrate for respiration. All carbohydrates are usually first converted into glucose before they are used for respiration. Other substrates can also be respired, but then they do not enter the respiratory pathway at the first step i.e., glycolysis.

Answer 2

Answer:

The various organic substances such as carbohydrates, fats and proteins are respired completely to carbon dioxide and water are called respiratory substrates. Under natural conditions only carbohydrates are used. Glucose being the simplest monosaccharide hexose molecule acts as the chief respiratory substrate.

Explanation:

Hope it helps

Mark as brainliest :)