MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the diameter of peroxisomes? |
| A. | 0.2 – 0.5 µm |
| B. | 0.1 – 1.0 µm |
| C. | 1 – 5 µm |
| D. | 1 – 10 µm |
| Answer» C. 1 – 5 µm | |
| 2. |
TCA cycle is a __________ process and glycolysis is a ______________ process. |
| A. | aerobic, anaerobic |
| B. | anaerobic, aerobic |
| C. | aerobic, aerobic |
| D. | oxidation, reduction |
| Answer» B. anaerobic, aerobic | |
| 3. |
Which of the following plays a role in oncogenic function? |
| A. | Kremer bodies |
| B. | Cajal bodies |
| C. | Splicing speckles |
| D. | None of the mentioned |
| Answer» B. Cajal bodies | |
| 4. |
Export of molecules from inside the nucleus to the cytoplasm needs hydrolysis ________ |
| A. | 1 GTP |
| B. | 1 ATP |
| C. | 2 GTPs |
| D. | 3 GTPs |
| Answer» B. 1 ATP | |
| 5. |
Nuclear speckles ______________ |
| A. | perform splicing of snRNPs |
| B. | perform splicing of rRNAs |
| C. | act as a transcription site for rRNAs |
| D. | act as a storage site for snRNPs |
| Answer» B. perform splicing of rRNAs | |
| 6. |
The TCA cycle produces ___________ |
| A. | 2 GTPs |
| B. | 1 GTP |
| C. | 3 GTPs |
| D. | 4 GTPs |
| Answer» B. 1 GTP | |
| 7. |
Which genetic disorder is associated with dysfunction of peroxisomes? |
| A. | Parkinson’s disease |
| B. | Down’s syndrome |
| C. | Zellweger Syndrome |
| D. | Bubble Boy Syndrome |
| Answer» D. Bubble Boy Syndrome | |
| 8. |
The import cycle of cargo or molecule inside the nucleus requires the hydrolysis of ___ |
| A. | 1 GTP |
| B. | 1 ATP |
| C. | 2 GTPs |
| D. | 3 GTPs |
| Answer» D. 3 GTPs | |
| 9. |
Processing of mRNA includes __________ |
| A. | 5′ capping, 3′ polyadenylation and RNA splicing |
| B. | 3′ capping, 5′ polyadenylation and RNA splicing |
| C. | 5′ capping and 3′ polyadenylation |
| D. | 5′ capping and RNA splicing |
| Answer» B. 3′ capping, 5′ polyadenylation and RNA splicing | |
| 10. |
Ionic gradient in which part of the mitochondrion drives the synthesis of ATP? |
| A. | matrix |
| B. | outer membrane |
| C. | inner membrane |
| D. | DNA |
| Answer» D. DNA | |
| 11. |
What is the major role of peroxisomes in our body? |
| A. | Breakdown of Formaldehyde |
| B. | Breakdown of proteins |
| C. | Breakdown of Hydrogen Peroxide |
| D. | Breakdown of Phthalates |
| Answer» D. Breakdown of Phthalates | |
| 12. |
The enzymes of glycolysis are located in the ______________ |
| A. | mitochondria |
| B. | golgi complex |
| C. | cytosol |
| D. | cytoplasm |
| Answer» D. cytoplasm | |
| 13. |
How many ATP molecules are produced per glucose molecules in eukaryotic Glycolysis? |
| A. | 2 ATP |
| B. | 3 ATP |
| C. | 4 ATP |
| D. | 6 ATP |
| Answer» B. 3 ATP | |
| 14. |
Which of the following cellular RNA is not dependent on RanGTP during transport outside nucleus? |
| A. | tRNA |
| B. | rRNA |
| C. | mRNA |
| D. | snRNA |
| Answer» D. snRNA | |
| 15. |
In the TCA cycle, which of the following combines with Acetyl CoA to form a 6 carbon compound? |
| A. | oxaloacetate |
| B. | glucose |
| C. | pyruvate |
| D. | thiamine |
| Answer» B. glucose | |
| 16. |
The first stable compound of Kreb’s cycle is _____________ |
| A. | Citrate |
| B. | Cis- Aconitate |
| C. | Oxaloacetate |
| D. | Malate |
| Answer» B. Cis- Aconitate | |
| 17. |
Which of the following is not involved in electron chain transport system? |
| A. | Complexes I, II, II, IV |
| B. | Ubiquinone |
| C. | Cytochrome C |
| D. | All of them are involved |
| Answer» E. | |
| 18. |
Acetyl CoA is a _____________ carbon compound. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 19. |
Nuclear Organizer Regions (NOR) is found in ________ |
| A. | Nuclear matrix |
| B. | Nucleolus |
| C. | Nuclear lamina |
| D. | Nucleoporins |
| Answer» C. Nuclear lamina | |
| 20. |
Which of the following is not a function of Cajal bodies? |
| A. | snRNP biogenesis |
| B. | histone mRNA processing |
| C. | telomere assembly |
| D. | tRNA processing |
| Answer» E. | |
| 21. |
Most of the free energy present in the glucose is stored as ATP after glycolysis. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 22. |
How many reactions that occur in the TCA cycle transfer electrons from a substrate to an electron accepting enzyme? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 23. |
What cell organelle assists in the oxidation of fatty acids along with peroxisomes? |
| A. | Ribosome |
| B. | Nucleus |
| C. | Endoplasmic Reticulum |
| D. | Mitochondria |
| Answer» E. | |
| 24. |
In the electron transport chain, each pair of electron donated by FADH₂ releases sufficient energy to produce __________ |
| A. | 3 ATPs |
| B. | 1 ATP |
| C. | 2 ATPs |
| D. | 4 ATPs |
| Answer» D. 4 ATPs | |
| 25. |
The maintenance of proton motive force requires that inner mitochondrial membrane remains permeable to protons. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 26. |
Which of the following enzyme produced by peroxisomes are present in plant cell, but absent in human cell? |
| A. | Catalase |
| B. | Peroxidase |
| C. | Uric acid oxidase |
| D. | D – amino acid oxidase |
| Answer» D. D – amino acid oxidase | |
| 27. |
Which cells in our body contains abundant peroxisomes? |
| A. | Liver cells |
| B. | Reproductive cells |
| C. | Cardiac cells |
| D. | Brain cells |
| Answer» B. Reproductive cells | |
| 28. |
The contribution made by electric potential versus pH gradient to the proton motive force (Δp) is determined by which property of the mitochondrial membrane? |
| A. | thickness |
| B. | position in the cell |
| C. | permeability |
| D. | number of cristae |
| Answer» D. number of cristae | |
| 29. |
Proton motive force is the net sum of how many gradient components? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 30. |
The free energy released during electron transport is utilized to move protons from _____________ to inner membrane and cytosol. |
| A. | extracellular environment |
| B. | outer membrane |
| C. | nucleus |
| D. | matrix |
| Answer» E. | |
| 31. |
For each molecule of glucose, how many times does the TCA cycle proceed? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 32. |
The enzyme aconitase is responsible for ________________ |
| A. | polymerization |
| B. | degradation |
| C. | assembly |
| D. | isomerization |
| Answer» E. | |
| 33. |
Nucleoporins are __________ |
| A. | Nuclear pores |
| B. | Ribosomes on nuclear membranes |
| C. | rRNAs in the nucleolus |
| D. | None of the mentioned |
| Answer» B. Ribosomes on nuclear membranes | |
| 34. |
Which of following processes does not require oxygen? |
| A. | respiration |
| B. | fermentation |
| C. | redox reaction |
| D. | oxidation |
| Answer» C. redox reaction | |
| 35. |
Which of following is lost during an oxidation reaction? |
| A. | electron |
| B. | proton |
| C. | hydrogen atom |
| D. | nitrogen atom |
| Answer» B. proton | |
| 36. |
What is free energy change per mole of glucose that is decomposed? |
| A. | 600 kcal |
| B. | 886 kcal |
| C. | 196 kcal |
| D. | 686 kcal |
| Answer» E. | |
| 37. |
Which of following is gained during an oxidation reaction? |
| A. | proton |
| B. | hydrogen atom |
| C. | nitrogen atom |
| D. | electron |
| Answer» E. | |