- A) Mitochondria
- B) Cytoplasm
- C) Nucleus
- D) Endoplasmic reticulum
Biochemistry MCQ
Total MCQ: 92
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Sourav
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Questions: 20
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Hector
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32 Which of the following statements about glycolytic intermediates is true?
- A) They can easily diffuse out of the cell.
- B) Most are phosphorylated metabolites.
- C) They do not participate in other metabolic pathways.
- D) They are all five-carbon sugars.
33 What regulates the flux through the irreversible steps in glycolysis?
- A) Concentration of substrates
- B) Activity levels of specific enzymes
- C) Availability of oxygen
- D) All of these factors
34 What happens to NAD+ during glycolysis?
- A) It is consumed.
- B) It is reduced to NADH.
- C) It is oxidized.
- D) It is converted to FADH2.
35 What does the term “ATP payoff phase” refer to in glycolysis?
- A) The phase where ATP is consumed
- B) The phase where ATP is generated
- C) The phase where glucose is broken down
- D) The phase where NADH is produced
36 Gaseous hydrogen burns in the presence of oxygen to form water: 2H₂ + O₂ → 2H₂O + energy
- A) Hydrogen, polar
- B) Oxygen, polar
- C) Oxygen, nonpolar
- D) Hydrogen, nonpolar
37 True or false? The reactions that generate the largest amounts of ATP during cellular respiration take place in the mitochondria.
- A) TRUE
- B) FALSE
- C)
- D)
38 Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?
- 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
39 What is the oxidizing agent in the reaction: Pyruvate + NADH + H⁺ → Lactate + NAD⁺
- A) Oxygen
- B) Pyruvate
- C) NADH
- D) Lactate
40 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