MCQOPTIONS
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MCQOPTIONS
This section includes 87 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Total number of ATPs formed by oxidation of one glucose molecule is ___________ |
| A. | 36 ATPs |
| B. | 30 ATP |
| C. | 32 ATPs |
| D. | 34 ATPs |
| Answer» B. 30 ATP | |
| 2. |
In the inner membrane of mitochondria, there is one protein molecule for approximately every _______ |
| A. | 15 phospholipids |
| B. | 25 phospholipids |
| C. | 5 phospholipids |
| D. | 10 phospholipids |
| Answer» B. 25 phospholipids | |
| 3. |
What enzyme is used to detoxify alcohol in our body? |
| A. | Catalase |
| B. | Peroxidase |
| C. | Urea – catalase |
| D. | Amylase |
| Answer» C. Urea – catalase | |
| 4. |
Which part of mitochondria is responsible for the degradation of many enzymes? |
| A. | Mitochondrial matrix |
| B. | Cristae |
| C. | Inner membrane |
| D. | Outer membrane |
| Answer» E. | |
| 5. |
The inner boundary membrane and inner cristal membrane are joined by ____ |
| A. | Mitochondrial junctions |
| B. | Membrane junctions |
| C. | Cristae junctions |
| D. | Tubule junctions |
| Answer» D. Tubule junctions | |
| 6. |
The TCA cycle produces ____________ |
| A. | 2 NADH |
| B. | 6 NADH |
| C. | 8 NADH |
| D. | 4 NADH |
| Answer» C. 8 NADH | |
| 7. |
The mitochondrial RNA polymerase is made up of _____________ |
| A. | 1 subunit |
| B. | 2 subunits |
| C. | 3 subunits |
| D. | multiple subunits |
| Answer» B. 2 subunits | |
| 8. |
How many ATP molecules are produced per Krebs’ Cycle in eukaryotes? |
| A. | 2 ATP |
| B. | 36 ATP |
| C. | 38 ATP |
| D. | 24 ATP |
| Answer» E. | |
| 9. |
Glycolysis takes place in _____ |
| A. | Outer membrane of mitochondria |
| B. | Inner membrane of mitochondria |
| C. | Mitochondrial matrix |
| D. | Cytosol |
| Answer» E. | |
| 10. |
The approximate proton motive force of an actively respiring mitochondrion is ____________ mV. |
| A. | 220 |
| B. | 240 |
| C. | 260 |
| D. | 280 |
| Answer» B. 240 | |
| 11. |
NADH and FADH₂ is associated with respectively ____________ |
| A. | Complexes I and complex II |
| B. | Complexes II and complex III |
| C. | Complexes I and complex III |
| D. | Complexes III and complex IV |
| Answer» B. Complexes II and complex III | |
| 12. |
For which organelle proton motive force is also a source of energy? |
| A. | nucleus |
| B. | ribosomes |
| C. | mitochondrion |
| D. | golgi complex |
| Answer» D. golgi complex | |
| 13. |
The mitochondrial DNA in humans encode for how many poplypeptides? |
| A. | 15 |
| B. | 13 |
| C. | 12 |
| D. | 11 |
| Answer» C. 12 | |
| 14. |
Which of the following molecules is present in the mitochondrion? |
| A. | Acetyl CoA |
| B. | Acetyl CoB |
| C. | Acetylanase |
| D. | Acetylcholine |
| Answer» B. Acetyl CoB | |
| 15. |
Export of proteins with exportin CRM1 can be inhibited by ___________ |
| A. | Leptomycin A |
| B. | Leptomycin B |
| C. | Leptomycin D |
| D. | Leptomycin H |
| Answer» C. Leptomycin D | |
| 16. |
Cajal bodies mainly consist of the protein _________ |
| A. | Emerin |
| B. | Actin |
| C. | Coilin |
| D. | Desprin |
| Answer» D. Desprin | |
| 17. |
The transport factors that help in the transport of molecules through the nuclear pores are known as ___________ |
| A. | Nucleopherins |
| B. | Nucleoporins |
| C. | Karyopherins |
| D. | Karyoporins |
| Answer» D. Karyoporins | |
| 18. |
Lamin proteins that bind to the intra-nuclear chromatin are _____________ |
| A. | Emerin |
| B. | Nesprin |
| C. | LEM-3 |
| D. | Cannot be said |
| Answer» D. Cannot be said | |
| 19. |
Which organelle is used in the production of white matter in the nervous system? |
| A. | Mitochondria |
| B. | Peroxisomes |
| C. | Endoplasmic Reticulum |
| D. | Ribosomes |
| Answer» C. Endoplasmic Reticulum | |
| 20. |
At the expense of two ATP molecules, how many phosphate groups are present on the fructose in the third step of glycolysis? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 21. |
Which of the following is also known as Krebs cycle? |
| A. | Electron transport chain |
| B. | Glycolysis |
| C. | TCA cycle |
| D. | DNA Replication |
| Answer» D. DNA Replication | |
| 22. |
Which of the following is also known as Kremer bodies? |
| A. | Cajal bodies |
| B. | PML bodies |
| C. | Nuclear speckles |
| D. | Nucleolus |
| Answer» C. Nuclear speckles | |
| 23. |
Which of the following displaces Importin-alpha from the cargo transported inside the nucleus? |
| A. | Impotin-beta |
| B. | RanGTP |
| C. | CAS |
| D. | RanGTPase |
| Answer» D. RanGTPase | |
| 24. |
Which of the following is an important end product of disassembly of fatty acids? |
| A. | Acetyl CoA |
| B. | Succinate dehydrogenase |
| C. | Pyruvate |
| D. | DNA gyrase |
| Answer» B. Succinate dehydrogenase | |
| 25. |
Mitochondria are not able to transport NADH from cytosol. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 26. |
How many molecules of ATP are formed from the catabolism of one glucose molecule? |
| A. | 12 |
| B. | 24 |
| C. | 36 |
| D. | 48 |
| Answer» D. 48 | |
| 27. |
Coenzyme A is derived from _________________ |
| A. | thiamin |
| B. | riboflavin |
| C. | pantothenic acid |
| D. | biotin |
| Answer» D. biotin | |
| 28. |
Decarboxylation of pyruvate group takes place in the ________________ |
| A. | outer mitochondrial membrane |
| B. | inner mitochondrial membrane |
| C. | mitochondrial matrix |
| D. | cytosol |
| Answer» E. | |
| 29. |
Which part of mitochondria has almost 70-75% protein content? |
| A. | Outer membrane |
| B. | Inner membrane |
| C. | Both outer and inner membrane |
| D. | Intermembrane space |
| Answer» C. Both outer and inner membrane | |
| 30. |
Mitochondria is the organ for ______ |
| A. | Cellular respiration |
| B. | Cellular digestion |
| C. | Cellular death |
| D. | Cellular motility |
| Answer» B. Cellular digestion | |
| 31. |
In presence of oxygen, how many additional molecules of ATP can be formed by metabolizing pyruvate and NADH in the mitochondria? |
| A. | more than 20 |
| B. | more than 30 |
| C. | more than 50 |
| D. | more than 100 |
| Answer» C. more than 50 | |
| 32. |
How many molecules of ATP are formed per molecule of glucose oxidized? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 33. |
Why are red blood cells anucleated? |
| A. | Presence of nucleus leads to heavier cells that cannot flow in blood stream |
| B. | Absence of nucleus leads to increased space for haemoglobin that carries molecular oxygen |
| C. | Presence of nucleus leads to increased proliferation of RBCs which harms the body |
| D. | All of the mentioned |
| Answer» C. Presence of nucleus leads to increased proliferation of RBCs which harms the body | |
| 34. |
Which of the following human cells are multinucleated? |
| A. | Myocytes |
| B. | Erythrocytes |
| C. | Megakaryocytes |
| D. | None of the mentioned |
| Answer» B. Erythrocytes | |
| 35. |
All enzymes of the TCA cycle reside in the mitochondrial membrane. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 36. |
How many reactions are constituted in a glycolytic pathway? |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | 15 |
| Answer» D. 15 | |
| 37. |
Oxidative phosphorylation and substrate-level phosphorylation are two different processes of ATP synthesis. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 38. |
Cardiolipin present in inner mitochondrial membrane plays a role in ___________ |
| A. | Formation of the respiratory mechanisms |
| B. | Activation of proteins involved in Glycolysis |
| C. | Activation of proteins involved in electron oxidation |
| D. | Activation of proteins |
| Answer» D. Activation of proteins | |
| 39. |
After glycolysis, which of the following is transported across the inner mitochondrial membrane into the matrix? |
| A. | Pyruvate |
| B. | Acetyl CoA |
| C. | ATP molecules |
| D. | Coenzyme A |
| Answer» B. Acetyl CoA | |
| 40. |
Who first discovered peroxisomes? |
| A. | Christian de Duve |
| B. | Boveri |
| C. | J Rhodin |
| D. | Van Beneden |
| Answer» B. Boveri | |
| 41. |
The protruding invaginated sheets inside mitochondria is known as _____ |
| A. | Cristae |
| B. | Fimbrae |
| C. | Hyphae |
| D. | Cellular Digestion |
| Answer» B. Fimbrae | |
| 42. |
Polysaccharides, fats and proteins break down into metabolites of __________________ |
| A. | Glycolysis |
| B. | TCA cycle |
| C. | RNA repair |
| D. | Membrane synthesis |
| Answer» C. RNA repair | |
| 43. |
Human mitochondrial DNA encodes for _________ |
| A. | 21 tRNAs |
| B. | 31 tRNAs |
| C. | 22 tRNA |
| D. | 24 tRNAs |
| Answer» D. 24 tRNAs | |
| 44. |
Which of the following first binds to the NLS protein sequence? |
| A. | Importin-alpha |
| B. | Importin-beta |
| C. | CAS protein |
| D. | NLS detecting protein |
| Answer» B. Importin-beta | |
| 45. |
Human mitochondrial DNA encodes for ____________ |
| A. | 2 rRNAs |
| B. | 3 rRNAs |
| C. | 1 rRNA |
| D. | 4 rRNAs |
| Answer» B. 3 rRNAs | |
| 46. |
Among which of the following Peroxisomes are absent? |
| A. | Bacillus subtilis |
| B. | Zea mays |
| C. | Homo habilis |
| D. | Euphlyctis hexadactylus |
| Answer» B. Zea mays | |
| 47. |
In the electron transport chain, each pair of electron transferred from NADH to oxygen releases sufficient energy to produce __________ |
| A. | 3 ATPs |
| B. | 1 ATP |
| C. | 2 ATPs |
| D. | 4 ATPs |
| Answer» B. 1 ATP | |
| 48. |
The TCA cycle produces _____________ |
| A. | 2 FADH₂ |
| B. | 3 FADH₂ |
| C. | 4 FADH₂ |
| D. | 1 FADH₂ |
| Answer» B. 3 FADH₂ | |
| 49. |
The ability of importins and exportins to transport molecules in and out of the nucleoporins is regulated by ______________ |
| A. | ATPases |
| B. | GTPases |
| C. | AMPases |
| D. | Both ATPases and GTPases |
| Answer» C. AMPases | |
| 50. |
Porins are present in ____________ |
| A. | Inner membrane |
| B. | Outer membrane |
| C. | Both inner and outer membrane |
| D. | Intermembrane space |
| Answer» D. Intermembrane space | |