Question

Which among the following is the instantaneous source of energy
A) Glucose
B) Proteins
C) Fats
D) Amino Acids

Answer 1

Hint: Respiration in plants occurs at all the parts including leaves and root. Since Restoration does not require light energy like photosynthesis, it can be conducted at night also. Sugar produced by photosynthesis can be sorted, transported throughout the tree converted into energy which is used as a source of power for the cells to carry out their cellular process.

Complete answer: Glucose is a monosaccharide and the favored 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 don’t enter the respiratory pathway at the first step. They are broken down into glycerol and fatty acid first. If fatty acids were to be respired they would first be degraded to acetyl CoA and enter the pathway. This role would enter the pathway after being converted to PGAL. The proteins would be degraded by proteases and the individual amino acids (after deamination) depending on their structure would enter the pathway at some stage within the Krebs cycle or even as pyruvate or acetyl CoA. Since respiration involves the breakdown of the substrate, the recipe theory process has traditionally been considered a catabolic process and the respiratory pathway as a catabolic pathway.
Thus option A is the correct answer.

Note: There is an amphibolic pathway in which both catabolism and anabolic of the compound take place. The breakdown is considered a catabolic process while the process of formation of a compound is anabolism. Citric acid cycle and glycolysis both are examples of the amphibolic pathway.