- A) Molecules in chemical bonds that cells can use for work
- B) Producing complex molecules from chemical building blocks
- C) The breakdown of glucose to carbon dioxide and water
- D) Breaking down ATP, so that ADP and P can be reused
Biochemistry MCQ
Total MCQ: 92
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52 What is the oxidizing agent in the reaction: Pyruvate + NADH + H⁺ → Lactate + NAD⁺
- A) Oxygen
- B) Pyruvate
- C) NADH
- D) Lactate
53 Which of the following describes the process of glycolysis?
- A) Converts glucose to pyruvate and CO₂
- B) First stage of glucose oxidation
- C) Occurs in mitochondria
- D) Produces 30 ATP, NADH
54 When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?
- A) NAD⁺ is oxidized
- B) ATP synthase pumps protons
- C) Cytochromes phosphorylate ADP
- D) pH of the matrix increases
55 How many NADH are produced by glycolysis?
- A) 3
- B) 2
- C) 4
- D) 5
56 Most CO₂ from catabolism is released during
- A) Citric acid cycle
- B) Oxidative phosphorylation
- C) Glycolysis
- D) Electron transport
57 In glycolysis, ATP molecules are produced by
- A) Substrate-level phosphorylation
- B) Photosynthesis
- C) Cellular respiration
- D) Photophosphorylation
58 In muscle cells, fermentation produces _____
- A) CO₂, ethanol, NADH, ATP
- B) Pyruvate
- C) Lactate and NAD⁺
- D) CO₂, ethanol, and NAD⁺
59 Which of these is NOT a product of glycolysis?
- A) NADH
- B) FADH₂
- C) Pyruvate
- D) ATP
60 In fermentation _____ is reduced and _____ is oxidized.
- A) Pyruvate ... NADH
- B) Lactate ... NADH
- C) NADH ... Lactate
- D) NAD⁺ ... Pyruvate