MDCAT Bioenergetics MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
2
Selected Topics
1
Available MCQs
657
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 657 total questions. Test will draw 50 shuffled MCQs.
Sample Bioenergetics MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Cellular Respiration
1. From one pyruvate passing through Kreb’s cycle, how many NADH are formed?
- A. 1
- B. 2
- C. 3
- D. 4
View answer and explanation
Answer: C. 3
This question tests the Krebs cycle energy yield. Each turn of the Krebs cycle, fed by one pyruvate via acetyl-CoA, produces 3 NADH molecules: one each at the isocitrate, alpha-ketoglutarate, and malate dehydrogenase steps. One FADH2 and one GTP are also formed per turn.
Photosynthesis
2. Chapter: Photosynthesis | Topic: Chloroplast stroma. Which enzyme is located in the chloroplast stroma and directly fixes C in the Calvin cycle?
- A. Rubisco
- B. Cytochrome c oxidase
- C. Succinate dehydrogenase
- D. ATP synthase
View answer and explanation
Answer: A. Rubisco
Rubisco catalyzes addition of C to ribulose-1,5-bisphosphate (RuBP) in the stroma. The other enzymes do not catalyze Calvin-cycle C fixation. The original question had both stroma enzymes and ribosomes as valid choices.
Photosynthesis
3. Which of the following is NOT produced during non-cyclic photophosphorylation (Z-scheme)?
- A. ATP
- B. NADPH
- C. Oxygen
- D. Glucose
View answer and explanation
Answer: D. Glucose
Non-cyclic photophosphorylation produces ATP, NADPH, and oxygen. Glucose is produced in the Calvin Cycle.
About this unit
MDCAT Bioenergetics — Unit 2
1071 practice MCQs covering Cellular Respiration, Photosynthesis. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Bioenergetics practice
How many Bioenergetics MCQs are available on DIFF. MDCAT?
The current Bioenergetics question bank contains 1,071 practice MCQs across 2 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Bioenergetics quiz cover?
The selectable topics are Cellular Respiration, Photosynthesis. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Bioenergetics test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Bioenergetics quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Bioenergetics MCQs to improve?
Start with a short tutor drill on one of these topics: Cellular Respiration, Photosynthesis. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.