MCQOPTIONS
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MCQOPTIONS
This section includes 180 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. |
According to laws of thermodynamics, the energy of the Universe is _________ whereas the entropy ______________ |
| A. | constant, increases |
| B. | constant, decreases |
| C. | increases, remains constant |
| D. | decreases, remains constant |
| Answer» B. constant, decreases | |
| 2. |
NAD⁺ can be derived from which vitamin? |
| A. | A |
| B. | C |
| C. | Riboflavin |
| D. | Niacin |
| Answer» E. | |
| 3. |
Why are enzymes required? |
| A. | Enzymes help to yield more product |
| B. | Enzymes increase the activation energy of the reaction |
| C. | Enzymes decrease the activation energy of the reaction |
| D. | Enzymes maintain the equilibrium in the reaction |
| Answer» D. Enzymes maintain the equilibrium in the reaction | |
| 4. |
How many basal body rings do Gram positive bacteria have in the flagella? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» B. 3 | |
| 5. |
Viruses can be cultivated in_________________ |
| A. | Whole plant |
| B. | Cell lines |
| C. | Chick Embryo |
| D. | All of the mentioned |
| Answer» E. | |
| 6. |
The functions of ATP are ___________ |
| A. | ATP acts as the main source of energy in cells |
| B. | Plays a role in transporting solutes and proteins across cell membranes |
| C. | Contribute to the building blocks of DNA |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Human Genome Project was focused on discovering the details of ___________ |
| A. | sNRPs |
| B. | 3D DNA structure |
| C. | Junk DNA |
| D. | VNTRs |
| Answer» D. VNTRs | |
| 8. |
Application of non-ionizing ultraviolet radiation causes _________ |
| A. | formation of pyrimidine dimers |
| B. | deletion of pyrimidine bases |
| C. | formation of methyl guanine |
| D. | formation of methyl thymine |
| Answer» B. deletion of pyrimidine bases | |
| 9. |
What will happen if heat is applied to an enzyme mediated reaction? |
| A. | Rate will increase |
| B. | pH will increase |
| C. | pH will decrease |
| D. | Denaturation of enzyme |
| Answer» B. pH will increase | |
| 10. |
The enzyme that catalyzes the transfer of a proton from a reactant to NAD+ is known as ______ |
| A. | Hydrolase |
| B. | Proton carrier |
| C. | Dehydrogenase |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 11. |
Those part of the DNA or gene that contribute to the mRNA product is called _________ |
| A. | Introns |
| B. | Intervening sequences |
| C. | Exons |
| D. | Split genes |
| Answer» D. Split genes | |
| 12. |
Giant polytene chromosomes are found in ___________ |
| A. | Egg of fruit fly |
| B. | Salivary gland of larvae of fruit fly |
| C. | Salivary gland of adult fruit fly |
| D. | All of the mentioned |
| Answer» C. Salivary gland of adult fruit fly | |
| 13. |
How many structural and non-structural proteins are there in the dengue virus? |
| A. | 7 ; 2 |
| B. | 3 ; 8 |
| C. | 3 ; 7 |
| D. | 3 ; 9 |
| Answer» D. 3 ; 9 | |
| 14. |
How can it be determined whether the parent progeny is homozygous or heterozygous? |
| A. | Test cross |
| B. | Back cross |
| C. | Monohybrid cross |
| D. | Reciprocal cross |
| Answer» B. Back cross | |
| 15. |
In FISH technology, which fluorescence confirms a BCR/ABL translocation? |
| A. | Red signal |
| B. | Green signal |
| C. | Yellow signal |
| D. | Orange signal |
| Answer» D. Orange signal | |
| 16. |
Who proposed that plant embryo arose from a single cell? |
| A. | Matthias Schleiden |
| B. | Theodor Schwann |
| C. | Robert Hooke |
| D. | Pasteur |
| Answer» B. Theodor Schwann | |
| 17. |
Enzymes have no effect on which of the following, in a chemical reaction? |
| A. | activation energy |
| B. | speed |
| C. | thermodynamics |
| D. | completion time |
| Answer» D. completion time | |
| 18. |
Genes that show tendency to be inherited together is known as ____________ |
| A. | Linkage group |
| B. | Homologous group |
| C. | Co-dependent genes |
| D. | None of the mentioned |
| Answer» B. Homologous group | |
| 19. |
The capsomeres contain small protein subunits known as ___________________ |
| A. | Protomeres |
| B. | Capsoproteins |
| C. | Prions |
| D. | None of the mentioned |
| Answer» B. Capsoproteins | |
| 20. |
Which are the two most important macromolecules of a cell? |
| A. | Proteins, Carbohydrates |
| B. | Nucleic Acids, Lipids |
| C. | Nucleic Acids, Proteins |
| D. | Lipids, Carbohydrates |
| Answer» D. Lipids, Carbohydrates | |
| 21. |
Protein catalysts are called __________ and RNA catalysts are called _____________ |
| A. | enzymes, ribozymes |
| B. | ribozymes, enzymes |
| C. | enzymes, ribosomes |
| D. | ribosomes, enzymes |
| Answer» B. ribozymes, enzymes | |
| 22. |
RNA does not have the nitrogen base of _______ |
| A. | Uracil |
| B. | Cytosine |
| C. | Thymine |
| D. | Adenine |
| Answer» D. Adenine | |
| 23. |
The integrated genetic material of a virus is called __________________ |
| A. | Viroid |
| B. | Provirus |
| C. | Virus-like-particle (VLP) |
| D. | Prion |
| Answer» C. Virus-like-particle (VLP) | |
| 24. |
In fermentation, which of the following is regenerated? |
| A. | Starch |
| B. | Oxygen |
| C. | NAD⁺ |
| D. | NADH |
| Answer» D. NADH | |
| 25. |
Proteome is a ____________ |
| A. | A precursor of protein |
| B. | Storehouse of proteins |
| C. | An inventory of the total amount of proteins |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 26. |
An example of polar but uncharged amino acid is ___________ |
| A. | Lysine |
| B. | Aspartate |
| C. | Serine |
| D. | Arginine |
| Answer» D. Arginine | |
| 27. |
Which of the following is a tenet of cell theory, as proposed by Theodor Schwann? |
| A. | Cell can be seen with naked eyes |
| B. | Only animals are composed of cells |
| C. | Cell is the structural unit of life |
| D. | Not all organisms have cells |
| Answer» D. Not all organisms have cells | |
| 28. |
Who was the first person to describe various forms of bacteria? |
| A. | Robert Hooke |
| B. | Schwann and Schleiden |
| C. | Antonie van Leeuwenhoek |
| D. | Peter |
| Answer» D. Peter | |
| 29. |
Which of the following are responsible virtually for every reaction that takes place inside a cell? |
| A. | Carbohydrates |
| B. | ADP |
| C. | Nucleic acids |
| D. | Enzymes |
| Answer» B. ADP | |
| 30. |
Which of the following is not a difference between cilia and flagella? |
| A. | Cilia is short hairlike; flagella is long thread-like |
| B. | Nexin present in cilia; Nexin absent in flagella |
| C. | Axoneme present in cilia; Axoneme absent in flagella |
| D. | Rapid rotational motion of Flagella; Sweeping slow movement of cilia |
| Answer» D. Rapid rotational motion of Flagella; Sweeping slow movement of cilia | |
| 31. |
Which of the following is not true for TMV Virus? |
| A. | It does not contain spikes |
| B. | TMV Virus affects tobacco plants |
| C. | It contains viral coat containing copies of multiple proteins |
| D. | It is a retrovirus |
| Answer» D. It is a retrovirus | |
| 32. |
Which of the following is a non-competitive inhibitor against protease produced by HIV? |
| A. | Tipranavir |
| B. | Acetylcholinesterase |
| C. | Ritonavir |
| D. | Phenicols |
| Answer» B. Acetylcholinesterase | |
| 33. |
Catabolic pathways result in _______________ of the molecules. |
| A. | assembly |
| B. | functionalization |
| C. | conformation |
| D. | disassembly |
| Answer» E. | |
| 34. |
How many types of protein kinases are there? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 35. |
In humans, glucose in the body is released by _____________ |
| A. | Intestine |
| B. | Kidney |
| C. | Liver |
| D. | Lungs |
| Answer» D. Lungs | |
| 36. |
Chymotrypsin is a ___________ |
| A. | starch |
| B. | polymer |
| C. | buffer |
| D. | enzyme |
| Answer» E. | |
| 37. |
Feedback inhibition occurs due to _______ |
| A. | Excess of the reactants in the reaction |
| B. | Presence of competitive inhibitor |
| C. | Increase in product to a certain level |
| D. | Presence of irreversible inhibitor |
| Answer» D. Presence of irreversible inhibitor | |
| 38. |
The segregation of alleles on one trait did not have any effect on the segregation of alleles on a different trait. This is based on ____________ |
| A. | Mendel’s law of Heredity |
| B. | Mendel’s law of Dominance |
| C. | Mendel’s law of Independent Assortment |
| D. | Mendel’s law of Segregation |
| Answer» D. Mendel’s law of Segregation | |
| 39. |
Which of the following is not true? |
| A. | Steroids are built around a four-ringed hydrocarbon skeleton |
| B. | Cholesterol, testosterone, progesterone are examples of steroids |
| C. | Steroids are found in the cell membranes of both plant and animal |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 40. |
In case of repeated contraction, muscle cells regenerate NAD⁺ by converting pyruvate to _____________ |
| A. | glycogen |
| B. | lactate |
| C. | starch |
| D. | cellulose |
| Answer» C. starch | |
| 41. |
Energy released by catabolic pathways is stored in how many forms? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 42. |
Feedback inhibition is cell’s mechanism to _____________ the process of anabolism. |
| A. | activate |
| B. | inhibit |
| C. | increase |
| D. | decrease |
| Answer» C. increase | |
| 43. |
Induced fit in an enzyme refers to ____________________ |
| A. | error |
| B. | loop |
| C. | conformational change |
| D. | torsional change |
| Answer» D. torsional change | |
| 44. |
The DNA binding proteins bind at the _______________ |
| A. | Minor groove |
| B. | Major groove |
| C. | Phosphate molecules |
| D. | Pentose sugars |
| Answer» C. Phosphate molecules | |
| 45. |
Hybrid vigour results from ____________ |
| A. | dominance |
| B. | co-dominance |
| C. | over dominance |
| D. | incomplete dominance |
| Answer» D. incomplete dominance | |
| 46. |
Anabolic pathways are energy-requiring. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 47. |
Allosteric enzymes are which _______ |
| A. | Have single subunit |
| B. | Have multiple subunits |
| C. | Follows Michaelis-Menten kinetics |
| D. | Do not affect the binding affinity |
| Answer» C. Follows Michaelis-Menten kinetics | |
| 48. |
Microvilli are composed of ____________ |
| A. | red blood cells |
| B. | myosin |
| C. | white blood cells |
| D. | actin |
| Answer» E. | |
| 49. |
Hydrolysis of ATP is which type of reaction? |
| A. | Physical |
| B. | Mechanical |
| C. | Endergonic |
| D. | Exergonic |
| Answer» E. | |
| 50. |
Escherichia coli and Vibrio cholerae are ________________ |
| A. | lophotrichous; monotrichous |
| B. | amphitrichous; lophotrichous |
| C. | peritrichous; monotrichous |
| D. | peritrichous; amphitrichous |
| Answer» D. peritrichous; amphitrichous | |