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 59 of 69
- A. Breakdown of glucose
- B. Formation of glucose
- C. Release of energy
- D. Exchange of gases
Explanation: "The explanation for this question will be added soon!"Glucogensis, gluconeogenesis or the formation of glucose ia process which isnot…
Correct answer: Formation of glucose- A. It combines with acetyl-CoA at the start of the Krebs cycle
- B. It plays no role
- C. It is given off as a by-product during the oxidation of pyruvates
- D. It is the final electron acceptor at the end of the electron transport chain
Explanation: "The explanation for this question will be added soon!"In the electron transport chain , oxygen acts as the final electron acceptor and…
Correct answer: It is the final electron acceptor at the end of the electron transport chain- A. Carbon dioxide
- B. Oxygen
- C. ATP
- D. Cytochrome a3
Explanation: "The explanation for this question will be added soon!"
Correct answer: Oxygen- A. G3P
- B. Dihydroxyacetone phosphate
- C. Pyruvate
- D. Both A and B
Explanation: The last step in preparatory phase of glycolysis is the enzymatic splitting of fructose 1,6 -bisphosphate into two fragments.
Correct answer: Both A and B- A. Glycolysis
- B. Fermentation
- C. Pyruvate oxidation
- D. Citric acid cycle
Explanation: This cycle was discovered by British scientist Sir Hans Krebs, therefore, called Krebs cycle.
Correct answer: Citric acid cycle- A. Chloroplast
- B. Stroma
- C. Thylakoids
- D. Grana
Explanation: "The explanation for this question will be added soon!".
Correct answer: Thylakoids1167. Calvin cycle is:
- A. Inhibited by light
- B. Supported by light
- C. Independent of light
- D. Dependent upon light
Explanation: "The explanation for this question will be added soon!".
Correct answer: Independent of light- A. Have been
- B. Was
- C. Is
- D. Has been
Explanation: The subject of the sentence is "All possible means", which is a plural noun phrase.- The verb "have been" agrees with the plural subject…
Correct answer: Have been1169. Choose the correct one.
- A. Little money he had saved for a rainy day was not sufficient.
- B. A little money he had saved for a rainy day was not sufficient.
- C. Only little money he had saved for a rainy day was not sufficient.
- D. The little money he had saved for a rainy day was not sufficient.
Explanation: It specifies that the small amount of money he had saved for a rainy day was not enough.
Correct answer: The little money he had saved for a rainy day was not sufficient.- A. Your, her and mine home are situated on the best street of the area.
- B. Yours, my and hers home are situated in the best street of the area.
- C. Your, her, and my home are situated on the best street of the area.
- D. Her, your's, and my home are situated in the best street of the area.
Explanation: "Your," "her," and "my" are all possessive adjectives that correctly modify the noun "home."
Correct answer: Your, her, and my home are situated on the best street of the area.- A. However
- B. Very
- C. Have
- D. None
Explanation: The phrase "in none case" is wrong; it should be "in any case."The pronoun around this phrase is incorrect, making 'none' the error.
Correct answer: None- A. Roughly
- B. Sporadically
- C. Accurately
- D. Regularly
Explanation: Crude is another word to describe rude, offensive behaviour, similar to rough.
Correct answer: Roughly- A. Only Conclusion III follows
- B. Only Conclusion II follows
- C. Only Conclusion I follows
- D. Only Conclusion IV follows
- E. All the conclusions follow
Explanation: To solve this question, analyze each statement and conclusion carefully:Statements:All boxes contain books.Some boxes contain…
Correct answer: Only Conclusion III follows- A. 10 + 5 - 14 ÷ 10 * 15 = 158
- B. 30 + 5 + 14 - 10 * 15 = 122
- C. 30 - 5 + 14 ÷ 10 * 15 = 162
- D. 30 * 5 - 4 ÷ 10 + 15 = 31
- E. None of these
Explanation: Your equation is:10 + 5 - 14 ÷ 10 * 15 = 158First, replace the symbols:+ → -- → +÷ → ** → ÷Thus, the equation becomes:10 - 5 + 14 * 10 ÷…
Correct answer: 30 * 5 - 4 ÷ 10 + 15 = 311175. Pick the odd word out:
- A. Just
- B. Fair
- C. Equitable
- D. Biased
Explanation: The words "just," "fair," and "equitable" are all synonyms related to impartiality and justice.
Correct answer: Biased- A. If only I is most appropriate
- B. If only II is most appropriate
- C. If either I or II is most appropriate
- D. If both I and II are most appropriate
Explanation: A public health crisis requires a comprehensive response. Fumigation (I) tackles the vector population, while personal protection (II)…
Correct answer: If both I and II are most appropriate- A. Statement I is the cause and statement II is its effect
- B. Statement II is the cause and statement I is its effect
- C. Both the statements I and II are independent causes
- D. Both the statements I and II are effects of independent causes
Explanation: The recent proliferation of shopping malls (Statement II) could be the cause of "mall fatigue" or concerns about overdevelopment, leading…
Correct answer: Statement II is the cause and statement I is its effect1178. In lactic acid fermentation, pyruvic acid converts into lactic acid by accepting electrons from:
- A. NAD+
- B. NADP+
- C. NADH
- D. NADPH
Explanation: Lactic Acid Fermentation: In this anaerobic process, pyruvic acid is reduced to lactic acid.
Correct answer: NADH- A. Citrate
- B. Malate
- C. Fumarate
- D. Succinate
Explanation: The Krebs cycle, also known as the citric acid cycle, begins with the condensation of Acetyl Co-A and Oxaloacetate to form citrate.
Correct answer: Citrate- A. The reduction of hydrogen carriers
- B. The oxidation of glyceraldehyde 3-phosphate
- C. Accepting electrons at the end of the electron transport chain
- D. Maintaining an oxygen concentration gradient in mitochondria
Explanation: The correct answer is Option C: accepting electrons at the end of the electron transport chain.
Correct answer: Accepting electrons at the end of the electron transport chain