Metabolism is the comprehensive set of chemical reactions that occur in living organisms to maintain life. It encompasses two primary processes: catabolism, which breaks down complex molecules like carbohydrates, fats, and proteins into simpler substances to release energy, and anabolism, which uses that energy to build and repair cellular components, such as synthesizing proteins, nucleic acids, and other essential molecules.
These reactions are regulated by enzymes and hormones, ensuring a balance that supports growth, reproduction, and response to environmental changes. Factors like age, genetics, diet, and physical activity influence metabolic rates, with basal metabolic rate (BMR) representing the energy used at rest.
Disruptions in metabolism can lead to conditions such as diabetes, obesity, or metabolic syndrome. A healthy metabolism is vital for overall well-being, often enhanced through balanced nutrition, regular exercise, and adequate sleep.
Table of contents
- Part 1: Create a metabolism quiz in minutes using AI with OnlineExamMaker
- Part 2: 20 metabolism quiz questions & answers
- Part 3: OnlineExamMaker AI Question Generator: Generate questions for any topic
Part 1: Create a metabolism quiz in minutes using AI with OnlineExamMaker
Are you looking for an online assessment to test the metabolism skills of your learners? OnlineExamMaker uses artificial intelligence to help quiz organizers to create, manage, and analyze exams or tests automatically. Apart from AI features, OnlineExamMaker advanced security features such as full-screen lockdown browser, online webcam proctoring, and face ID recognition.
Recommended features for you:
● Includes a safe exam browser (lockdown mode), webcam and screen recording, live monitoring, and chat oversight to prevent cheating.
● Enhances assessments with interactive experience by embedding video, audio, image into quizzes and multimedia feedback.
● Once the exam ends, the exam scores, question reports, ranking and other analytics data can be exported to your device in Excel file format.
● Offers question analysis to evaluate question performance and reliability, helping instructors optimize their training plan.
Automatically generate questions using AI
Part 2: 20 metabolism quiz questions & answers
or
1. Question: What is metabolism?
A) The process of converting food into energy
B) The breakdown of proteins only
C) The synthesis of vitamins
D) The storage of fats without energy release
Answer: A
Explanation: Metabolism encompasses all chemical reactions in the body that convert food into energy, involving catabolic and anabolic processes.
2. Question: Which of the following is a catabolic process?
A) Glycolysis
B) Protein synthesis
C) DNA replication
D) Photosynthesis
Answer: A
Explanation: Glycolysis breaks down glucose into pyruvate, releasing energy, which is a key catabolic pathway.
3. Question: What is the primary function of ATP in metabolism?
A) To store and transfer energy
B) To build cell membranes
C) To transport oxygen
D) To regulate body temperature
Answer: A
Explanation: ATP acts as the main energy currency in cells, storing energy from metabolic reactions and transferring it for cellular work.
4. Question: In which organelle does the Krebs cycle occur?
A) Mitochondria
B) Chloroplast
C) Nucleus
D) Endoplasmic reticulum
Answer: A
Explanation: The Krebs cycle takes place in the mitochondrial matrix, where acetyl-CoA is oxidized to produce energy carriers.
5. Question: What molecule is the final electron acceptor in aerobic respiration?
A) Oxygen
B) Carbon dioxide
C) Water
D) ATP
Answer: A
Explanation: Oxygen accepts electrons at the end of the electron transport chain, forming water and allowing the process to continue.
6. Question: Which enzyme is involved in the first step of glycolysis?
A) Hexokinase
B) Pyruvate kinase
C) Lactate dehydrogenase
D) Citrate synthase
Answer: A
Explanation: Hexokinase phosphorylates glucose to glucose-6-phosphate, initiating the glycolysis pathway.
7. Question: What is the net production of ATP from one molecule of glucose in glycolysis?
A) 2 ATP
B) 4 ATP
C) 36 ATP
D) 38 ATP
Answer: A
Explanation: Glycolysis produces a net gain of 2 ATP molecules per glucose molecule through substrate-level phosphorylation.
8. Question: Which process directly links glycolysis to the Krebs cycle?
A) Pyruvate oxidation
B) Fermentation
C) Photophosphorylation
D) Beta-oxidation
Answer: A
Explanation: Pyruvate from glycolysis is oxidized to acetyl-CoA, which enters the Krebs cycle for further energy production.
9. Question: What role do coenzymes like NAD+ play in metabolism?
A) They carry electrons and hydrogen ions
B) They synthesize proteins
C) They break down lipids
D) They regulate pH levels
Answer: A
Explanation: NAD+ accepts electrons during redox reactions, such as in glycolysis and the Krebs cycle, to facilitate energy transfer.
10. Question: In anaerobic conditions, what happens to pyruvate in muscle cells?
A) It is converted to lactate
B) It enters the Krebs cycle
C) It produces ATP directly
D) It is used in photosynthesis
Answer: A
Explanation: In the absence of oxygen, pyruvate is reduced to lactate in muscle cells to regenerate NAD+ for glycolysis to continue.
11. Question: Which factor does NOT affect metabolic rate?
A) Age
B) Thyroid hormones
C) Hair color
D) Physical activity
Answer: C
Explanation: Hair color has no direct impact on metabolic rate, unlike age, hormones, and activity which influence energy expenditure.
12. Question: What is the end product of the electron transport chain in cellular respiration?
A) Water
B) Carbon dioxide
C) Glucose
D) Oxygen
Answer: A
Explanation: The electron transport chain uses electrons to pump protons, ultimately combining them with oxygen to form water.
13. Question: Which metabolic pathway is unique to plants and some bacteria?
A) Photosynthesis
B) Glycolysis
C) Krebs cycle
D) Fermentation
Answer: A
Explanation: Photosynthesis converts light energy into chemical energy, producing glucose and oxygen, which is not found in animals.
14. Question: How does insulin affect metabolism?
A) It promotes glucose uptake into cells
B) It breaks down glycogen
C) It inhibits protein synthesis
D) It increases fat breakdown
Answer: A
Explanation: Insulin facilitates the absorption of glucose from the blood into cells, lowering blood sugar and supporting anabolic processes.
15. Question: What is beta-oxidation?
A) The breakdown of fatty acids to produce acetyl-CoA
B) The synthesis of fatty acids
C) The conversion of proteins to amino acids
D) The production of ATP in the cytoplasm
Answer: A
Explanation: Beta-oxidation occurs in the mitochondria, breaking down fatty acids into acetyl-CoA for energy production.
16. Question: Which molecule is a key intermediate in both glycolysis and gluconeogenesis?
A) Fructose-1,6-bisphosphate
B) Acetyl-CoA
C) Oxaloacetate
D) Pyruvate
Answer: D
Explanation: Pyruvate serves as a pivotal molecule, being the end product of glycolysis and a starting point for gluconeogenesis.
17. Question: What happens during the light-dependent reactions of photosynthesis?
A) ATP and NADPH are produced
B) Glucose is synthesized
C) Carbon dioxide is fixed
D) Oxygen is consumed
Answer: A
Explanation: Light energy is converted into chemical energy, producing ATP and NADPH for use in the Calvin cycle.
18. Question: Which vitamin is essential for the metabolism of carbohydrates?
A) Thiamine (B1)
B) Vitamin C
C) Vitamin D
D) Vitamin E
Answer: A
Explanation: Thiamine is a cofactor for enzymes in the pyruvate dehydrogenase complex, crucial for carbohydrate metabolism.
19. Question: In metabolic terms, what is basal metabolic rate (BMR)?
A) The energy used for basic bodily functions at rest
B) The energy from exercise
C) The energy stored as fat
D) The energy from digestion
Answer: A
Explanation: BMR represents the minimum energy required to maintain vital functions like breathing and heartbeat when at rest.
20. Question: How does fever affect metabolism?
A) It increases the metabolic rate
B) It decreases enzyme activity
C) It stops ATP production
D) It has no effect
Answer: A
Explanation: Fever elevates body temperature, speeding up enzymatic reactions and thus increasing overall metabolic rate.
or
Part 3: OnlineExamMaker AI Question Generator: Generate questions for any topic
Automatically generate questions using AI