question_answer

DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage - 1 Respiration is the basic characteristics of all living beings. It is an energy releasing reaction. In this process the living cells break down the complex high energy food molecules into simple low energy molecules by oxidation, forming carbon dioxide and water. In this a large amount of energy is released, which is used to carry out various life activities by the organism. Respiration in human beings:

A) involves exchange of gases

B) involves inspiration and expiration

C) involves oxidation of glucose

D) all the above are correct