Question

(a) What is meant by respiration?


(b) A graph was plotted to show the energy output of two types of respiration:

(i) Identify the types of respiration denoted by curves A and B.
(ii) How do you arrive at your answer?

Answer 1

(a) Respiration is the process of breakdown of complex C-C bonds of organic compounds which results in the release of considerable amount of energy that can be used by an organism.

(b) (i) Graph B shows aerobic respiration whereas graph A shows anaerobic respiration.
(ii) The energy output in graph B is more as compared to the energy output in graph A. In aerobic respiration, large amounts of energy is produced compared to the anaerobic respiration.