Electron Transport Chain Steps – Definition
Electron Transport Chain is an aerobic respiration takes place in the mitochondria. The collection of molecules embedded in the inner membrane of the mitochondrion is termed as the electron transport chain. The electron transport chain is more efficient than glycolysis for producing ATP in the presence of oxygen.
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The “Electron Transport Chain” MCQs will help you to understand the steps of electron transport chain in detail. All the MCQs about Electron Transport Chain are published according to the new study syllabus for academic year 2021-22.
Table of Contents:
- FADH2 an alternate source of electron
- Steps of electron transport chain
All of these MCQs on “Electron Transport Chain” in Zoology MCQs are preferably for test / interview preparation for BSc, MSc, BS (Hons), NTS, FPSC, PPSC, PTS, CSS, MDCAT, ECAT, MCAT and all other competitive examination for foreign study including overseas students.
MCQs on Electron Transport Chain Multiple Choice Questions
Q1. The collection of molecules embedded in the inner membrane of the mitochondrion is called:
- electron transport chain
- Krebs cycle
Q2. The folding of the inner membrane forms ___________.
Q3. Prosthetic groups are tightly bound to molecules of:
Q4. Naturally prosthetic groups are:
- protein components
- non-protein components
- lipids components
- phospholipids components
Q5. Which are essential for the proper functioning of certain enzymes?
- Prosthetic groups
- Functional groups
Q6. During electron transport chain, the prosthetic groups alternate between reduced and oxidized states and they accept and donate electrons. True/false
𓇼 FADH2 An Alternate Source Of Electron:
Q7. Another source of electrons for the transport chain is:
Q8. During which process FADH2 is produced?
- Krebs cycle
- Electron transport chain
Q9. At which energy level, FADH2 adds its electrons to transport chain than that of NADH?
- High energy level
- Low energy level
- Moderate energy level
- All of the above
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Q10. The function of electron transport chain is/are:
- makes no ATP directly
- to pass electrons from food to oxygen
- breaks a large free energy into a series of smaller steps
- all of the above
Q11. The electron transport chain provides about one third less energy from FADH2. True/False
Q12. During which mechanism, mitochondria synthesize ATP?
- Active transport
𓇼 Steps Of Electron Transport Chain:
Q13. In which process electrons are removed from food?
- Krebs Cycle
- Both a and b
Q14. Electrons which are removed from food form NADH. True/False
Q15. NADH transfers the electrons to FADH2. True/False
Answer: False (to flavoprotein)
Q16. Which is the first molecule of electron transport chain?
Q17. The Flavoprotein has a prosthetic group called mononucleotide (FMN). True/False
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Q18. Flavoprotein mononucleotide (FMN) passes electrons to a/an:
- iron-sulfur protein
Q19. During electron transport chain, which molecule then passes the electrons to a compound ubiquinone (Q)?
Q20. Ubiquinone (Q) is the only member of the electron transport chain that is not a protein. True/False
Q21. When iron-protein passes the electrons to ubiquinone, a molecule of ATP is synthesized during this transfer. True/False
Q22. Most of the remaining electron carriers between ubiquinone (Q) and oxygen are proteins named:
Q23. Cytochromes prosthetic group is called haem group. True/False
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Q24. Haem group is an organic ring which surrounds a:
- single iron atom
- double iron atom
- triple iron atom
Q25. The electron chain has several types of cytochromes, each group has a different protein with a haem group includes:
- cytochrome b, cytochrome c1
- cytochrome c, cytochrome a
- cytochrome a3
- all of the above
Q26. During the transfer of electron through the cytochromes, how many molecules of ATP are produced?
- Two molecules
- Four molecules
- Three molecules
- Six molecules