Question

Respiration is a process in which
A. Energy is stored in the form of ADP.
B. Energy is used up.
C. Energy is released and stored in the form of ATP.
D. Energy is not released at all.

Answer 1

Hint:- In general physiology, respiration is a process of movement of air (oxygen) from the environment into the system (body), its transport to all the parts of the body, and the elimination of carbon dioxide to the atmosphere.

Complete answer:
Each and every living organism performs the process of respiration. The physiological definition is just the outer mechanism, but the details of the process of respiration can be understood on the biochemical level. Respiration is a metabolic pathway in which energy is obtained in the form of ATP and NADPH. During respiration, complex organic molecules which are present in the cells are broken down into simpler substances. This takes place due to oxidation of these nutrients and releasing the waste products to the outer environment. The energy is produced by the breakdown of the glucose molecules and this energy is utilised by the cells to perform different functions.
Additional information: There are two types of respiration – aerobic respiration and anaerobic respiration. In aerobic type, respiration occurs in the presence of oxygen, while in the anaerobic type, respiration occurs in the absence of oxygen. Although in both the aerobic as well as the anaerobic process, energy is released in the form of ATP.

So the correct option is (C) Energy is released and stored in the form of ATP.

Note:- Although physiological respiration and cellular respiration are interconnected, they are different processes. Cellular respiration occurs in each single cell present in the body of an organism, whereas physiological respiration is only concerned with the diffusion of the gases and transport of the metabolites along with them.