Respiration -Multiple Choice Questions Quiz

Interactive MCQs on “Respiration”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1:What is the primary purpose of respiration in living organisms?

(A) To create oxygen
(B) To produce carbon dioxide
(C) To produce ATP for cellular activities
(D) To generate heat for the body

Question 2:Which process in cellular respiration does not require oxygen?

(A) Glycolysis
(B) Citric acid cycle
(C) Electron transport chain
(D) ATP synthesis

Question 3: Where does aerobic respiration occur in a cell?

(A) Nucleus
(B) Cytoplasm
(C) Mitochondria
(D) Ribosome

Question 4:What are the products of aerobic respiration?

(A) Carbon dioxide, oxygen, and glucose
(B) Oxygen, glucose, and water
(C) Carbon dioxide, water, and ATP
(D) Oxygen, water, and glucose

Question 5:What is the first step of aerobic respiration?

(A) Krebs cycle
(B) Glycolysis
(C) Electron transport chain
(D) ATP hydrolysis

Question 6:What is the process of fermentation?

(A) The breakdown of glucose into carbon dioxide
(B) The production of ATP without oxygen
(C) The process of cellular respiration in the mitochondria
(D) The use of light energy to produce food

Question 7:Which of the following is a by-product of fermentation in yeast?

(A) Ethanol and carbon dioxide
(B) Oxygen and water
(C) Lactic acid and oxygen
(D) Glucose and carbon dioxide

Question 8:How is lactic acid produced in human muscle cells during anaerobic conditions?

(A) By breakdown of glucose in the presence of oxygen
(B) By incomplete breakdown of glucose when oxygen is scarce
(C) By breaking down fats instead of glucose
(D) By converting proteins into amino acids

Question 9:What is the role of oxygen in cellular respiration?

(A) To break down glucose
(B) To form lactic acid
(C) To produce carbon dioxide
(D) To accept electrons in the electron transport chain

Question 10:What is the total number of ATP molecules produced by aerobic respiration of one molecule of glucose?

(A) 12 ATP
(B) 24 ATP
(C) 36-38 ATP
(D) 50 ATP