Free Bioenergetics MCQs with Answers
1,378 Bioenergetics MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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Read the Bioenergetics notesFree MDCAT chapter notes with key terms1,378 questions · page 58 of 69
- A. It does not require light energy
- B. Cannot occur during daytime
- C. Occurs more rapidly at night
- D. It can also Occur in darkness
Explanation: Dark reaction in photosynthesis is called so because it does not require light energy.
Correct answer: It does not require light energy1142. Calvin cycle occurs in:
- A. Chloroplast
- B. Mitochondria
- C. Glyoximes
- D. Cytoplasm
Explanation: Chloroplasts are cellular organelles found in the cells of plants, algae, and some protists.
Correct answer: Chloroplast- A. Stoma of the chloroplast
- B. Space between the two membranes of the chloroplast
- C. Membranes of the Stroma lamellae
- D. Thylakoid membrane of the grana
Explanation: Dark reaction of photosynthesis occurs in stoma of the chloroplast.
Correct answer: Stoma of the chloroplast- A. CO2 is reduced to organic compound
- B. Chlorophyll is activated
- C. 6C sugar is broken down into 3C sugar
- D. Photolysis
Explanation: This statement is correct. During the Calvin cycle, carbon dioxide is reduced and incorporated into organic compounds, ultimately leading…
Correct answer: CO2 is reduced to organic compound- A. Ribulose 1,5 bisphosphate carboxylase
- B. Triosephosphate dehydrogenase
- C. Cytochrome oxidase
- D. Hexokinase
Explanation: "The explanation for this question will be added soon!".
Correct answer: Ribulose 1,5 bisphosphate carboxylase- A. Four
- B. Six
- C. Eight
- D. Two
Explanation: Carbon dioxide fixation occurs during Calvin cycle. There are three stages in the process of Clavin cycle as carboxylation, reduction, and…
Correct answer: Six- A. ChlorophyII
- B. Water molecules
- C. O2
- D. RuBP
Explanation: The answer is A) Chlorophyll.Chlorophyll is a green pigment that is found in chloroplasts, the organelles that are responsible for…
Correct answer: ChlorophyII- A. ADP
- B. AMP
- C. NADPH
- D. Chlorophyll
Explanation: ADP (adenosine diphosphate) is a molecule that is used to store energy in cells.
Correct answer: NADPH- A. 24H+
- B. 12H+
- C. 48H+
- D. 6H+
Explanation: The answer is A) 24H+ Each water molecule releases two protons when it is split during the process of photolysis.
Correct answer: 24H+- A. Oxygen is given out
- B. Carbon dioxide is given out
- C. Carbon dioxide is taken in
- D. Oxygen is taken in
Explanation: "The explanation for this question will be added soon!"
Correct answer: Carbon dioxide is given out- A. Most body cells
- B. Eukaryotic cells
- C. Anaerobic bacteria
- D. Virtually all cells
Explanation: "The explanation for this question will be added soon!"
Correct answer: Virtually all cells- A. 1
- B. 16
- C. 38
- D. 0
Explanation: "The explanation for this question will be added soon!"
Correct answer: 01153. Krebs Cycle starts with the formation of a 6-carbon atom compound by a chemical reaction between:
- A. Succinic Acid and Acetyl-CoA
- B. Fumaric Acid and Pyruvic Acid
- C. Oxaloacetic Acid and Acetyl-CoA
- D. Malic Acid and Acetyl-CoA
Explanation: Krebs cycle starts with the formation of a six-carbon compound by the reaction between oxaloacetic acid and acetyl CoA.
Correct answer: Oxaloacetic Acid and Acetyl-CoA- A. Glucose is converted into alcohol and CO2
- B. Sugar is converted into pyruvic acid
- C. Pyruvic acid is converted into CO2 and H2O
- D. Pyruvic acid is converted into CoA
Explanation: "The explanation for this question will be added soon!"
Correct answer: Pyruvic acid is converted into CO2 and H2O- A. Glucose to pyruvate
- B. Pyruvic acid to lactic acid
- C. Pyruvate to acetyl-CoA
- D. Pyruvate to glucose
Explanation: "The explanation for this question will be added soon!"
Correct answer: Pyruvate to acetyl-CoA- A. 6
- B. 5
- C. 4
- D. 2
Explanation: "The explanation for this question will be added soon!"
Correct answer: 6- A. In the matrix
- B. At the cristae
- C. At the outer membrane
- D. In the intra cristae space
Explanation: "The explanation for this question will be added soon!"
Correct answer: At the cristae- A. FAD
- B. ADP
- C. ATP
- D. NAD
Explanation: "The explanation for this question will be added soon!"
Correct answer: FAD1159. A molecule of FADH2
- A. Consumes one O2
- B. Consumes one H2O molecule
- C. Forms 2 ATP
- D. All the above
Explanation: "The explanation for this question will be added soon!"
Correct answer: Forms 2 ATP- A. Acetyl CoA
- B. Alcohol
- C. Lactic acid
- D. All of these
Explanation: "The explanation for this question will be added soon!"This is correct because in yeast alcoholic fermentation takes place and the pyruvic…
Correct answer: Alcohol