Animal Metabolism MCQS January 8, 2026April 6, 2024 by u930973931_answers 18 min Score: 0 Attempted: 0/18 Subscribe 1. What is metabolism in animals? (A) The process of energy production in cells (B) The breakdown of organic molecules to release energy (C) The synthesis of organic molecules (D) All of the above 2. Which of the following is NOT a primary metabolic process in animals? (A) Glycolysis (B) Photosynthesis (C) Citric acid cycle (Krebs cycle) (D) Oxidative phosphorylation 3. Where does glycolysis occur in animal cells? (A) Mitochondria (B) Nucleus (C) Cytoplasm (D) Endoplasmic reticulum 4. Which molecule is the primary fuel for cellular respiration in animals? (A) Glucose (B) Lipids (C) Proteins (D) Nucleic acids 5. What is the final electron acceptor in the electron transport chain during cellular respiration? (A) Oxygen (B) Carbon dioxide (C) Water (D) ATP 6. What is the purpose of the citric acid cycle (Krebs cycle) in cellular respiration? (A) To produce ATP (B) To produce carbon dioxide (C) To generate reducing agents for the electron transport chain (D) To produce glucose 7. Which process occurs in the absence of oxygen and produces lactic acid or ethanol? (A) Oxidative phosphorylation (B) Glycolysis (C) Citric acid cycle (D) Beta-oxidation 8. What is the term for the breakdown of fats into fatty acids and glycerol? (A) Glycolysis (B) Gluconeogenesis (C) Beta-oxidation (D) Lipogenesis 9. Where does oxidative phosphorylation occur in animal cells? (A) Cytoplasm (B) Mitochondrial matrix (C) Mitochondrial inner membrane (D) Endoplasmic reticulum 10. Which molecule carries high-energy electrons to the electron transport chain during cellular respiration? (A) ADP (B) FAD (C) ATP (D) NAD+ 11. What is the primary function of the electron transport chain in cellular respiration? (A) To produce carbon dioxide (B) To generate reducing agents (C) To produce ATP (D) To oxidize glucose 12. Which molecule serves as the “currency” for energy transfer in cells? (A) ATP (B) Glucose (C) NADH (D) FADH2 13. What is the net gain of ATP molecules produced during glycolysis? (A) 6 ATP (B) 4 ATP (C) 2 ATP (D) 8 ATP 14. Which of the following metabolic pathways is primarily anabolic, synthesizing molecules from smaller precursors? (A) Glycolysis (B) Beta-oxidation (C) Citric acid cycle (D) Lipogenesis 15. What is the main function of the pentose phosphate pathway in metabolism? (A) ATP production (B) Amino acid synthesis (C) Glucose synthesis (D) NADPH production 16. Which of the following processes occurs during the fed state in animals? (A) Glycogenolysis (B) Lipogenesis (C) Lipolysis (D) Gluconeogenesis 17. Which hormone stimulates glycogenolysis and gluconeogenesis during the fasting state? (A) Glucagon (B) Insulin (C) Cortisol (D) Thyroid hormone 18. Which hormone stimulates lipolysis during the fasting state? (A) Cortisol (B) Glucagon (C) Insulin (D) Thyroid hormone