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. |
Which of the following is true based on the strength of the bond? |
| A. | Ionic > Covalent > Vanderwaal > Hydrogen |
| B. | Covalent > Ionic > Vanderwaal > Hydrogen |
| C. | Covalent > Ionic > Hydrogen > Vanderwaal |
| D. | Covalent > Ionic > Hydrogen = Vanderwaal |
| Answer» C. Covalent > Ionic > Hydrogen > Vanderwaal | |
| 2. |
Which of following mechanisms do not contribute to shuffling of genes during reproduction? |
| A. | crossing over |
| B. | independent assortment |
| C. | fertilization |
| D. | SNP |
| Answer» E. | |
| 3. |
Individuals of same species living in one area and interbreeding are called |
| A. | herd |
| B. | population |
| C. | den |
| D. | group |
| Answer» C. den | |
| 4. |
How many olfactory receptor genes are present in humans? |
| A. | 350 |
| B. | 400 |
| C. | 600 |
| D. | 700 |
| Answer» B. 400 | |
| 5. |
Presence of which of following elements in rock layers indicated mass extinction caused by a meteorite about 65 million years ago? |
| A. | iridium |
| B. | calcium |
| C. | titanium |
| D. | oxygen |
| Answer» B. calcium | |
| 6. |
Which of following is a crustacean? |
| A. | cray fish |
| B. | jelly fish |
| C. | silver fish |
| D. | spider |
| Answer» B. jelly fish | |
| 7. |
Which of following is not a blood group type in humans? |
| A. | a positive |
| B. | b negative |
| C. | ab |
| D. | abo |
| Answer» E. | |
| 8. |
Glycolysis begins with which of the following reactions? |
| A. | reduction |
| B. | oxidation |
| C. | phosphorylation |
| D. | acidification |
| Answer» D. acidification | |
| 9. |
ATP is abbreviation of which of following? |
| A. | Adenosine triphosphate |
| B. | Adenosine tetra phosphate |
| C. | Adenine triphosphate |
| D. | Alanine triphosphate |
| Answer» B. Adenosine tetra phosphate | |
| 10. |
Molecule that an enzyme acts on is called |
| A. | substrate |
| B. | key |
| C. | reactant |
| D. | proton |
| Answer» B. key | |
| 11. |
Which of following is smallest unit of classification? |
| A. | kingdom |
| B. | phyla |
| C. | domain |
| D. | specie |
| Answer» E. | |
| 12. |
The rotary engine made of protein at the base of the flagella is driven by ______________ |
| A. | Vanderwaal’s foce |
| B. | Proton- motive force |
| C. | Electron passage |
| D. | Exchange of sodium and potassium ions |
| Answer» C. Electron passage | |
| 13. |
Which of the following is a non-polar molecule? |
| A. | Water |
| B. | Ammonia |
| C. | Ethylene |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 14. |
Competitive enzyme inhibitors are ________ |
| A. | Reversible inhibitors |
| B. | Irreversible inhibitors |
| C. | Permanent inhibitors |
| D. | None of the mentioned |
| Answer» B. Irreversible inhibitors | |
| 15. |
In cellular division, one cell gives rise to two daughter cells containing equal volume. However such a case of regular division is not observed in ________________ |
| A. | White blood cells |
| B. | Liver cells |
| C. | Oocytes |
| D. | Red blood cells |
| Answer» D. Red blood cells | |
| 16. |
The non-protein constituents of conjugated proteins are called ___________ |
| A. | enzymes |
| B. | cofactors |
| C. | amino acids |
| D. | nucleosides |
| Answer» C. amino acids | |
| 17. |
The following diseases is caused by viruses ____________ |
| A. | Influenza |
| B. | Measles |
| C. | Typhoid |
| D. | Both Influenza and Measles |
| Answer» E. | |
| 18. |
How many mechanisms exist for altering the shape of an enzyme, playing a role in regulating glucose oxidation? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 19. |
Which of the following has the largest DNA sequence? |
| A. | Pithovirus sibericum |
| B. | Megavirus chilensis |
| C. | TMV |
| D. | T4 bacteriophage |
| Answer» C. TMV | |
| 20. |
Escherichia coli commonly inhabit the _______________ place. |
| A. | Human endodermal layer |
| B. | Human digestive tract |
| C. | Human bronchioles |
| D. | Human skin surface |
| Answer» C. Human bronchioles | |
| 21. |
Which of following gas causes ocean acidification? |
| A. | oxygen |
| B. | carbon dioxide |
| C. | nitrogen |
| D. | sulphur |
| Answer» C. nitrogen | |
| 22. |
Fruit fly is heterozygous for how much of its loci? |
| A. | 0.19 |
| B. | 0.14 |
| C. | 0.9 |
| D. | 0.01 |
| Answer» C. 0.9 | |
| 23. |
Temperature at which most of thermophilic bacterial enzymes work best is approximately |
| A. | 100 °C and above |
| B. | 70 °C and above |
| C. | 20 °C and above |
| D. | 10 °C and above |
| Answer» C. 20 °C and above | |
| 24. |
At which temperature enzyme works best? |
| A. | highest temperature |
| B. | lowest temperature |
| C. | optimum temperature |
| D. | medium temperature |
| Answer» D. medium temperature | |
| 25. |
Initial free energy required to start reaction is called |
| A. | initial energy |
| B. | activation energy |
| C. | free energy |
| D. | first energy |
| Answer» C. free energy | |
| 26. |
Which of the following was first examined under a microscope that later led to the discovery of cells? |
| A. | Honeycomb |
| B. | Cork |
| C. | Drosophila |
| D. | Dead leaves |
| Answer» C. Drosophila | |
| 27. |
Groove on surface of enzyme where reaction occurs is called |
| A. | substrate site |
| B. | product site |
| C. | enzyme site |
| D. | active site |
| Answer» E. | |
| 28. |
In which of following, enzymes for cellular respiration is present? |
| A. | endoplasmic reticulum |
| B. | mitochondria |
| C. | lysosomes |
| D. | nucleus |
| Answer» C. lysosomes | |
| 29. |
Geospiza fortis is scientific name for which of following? |
| A. | mice |
| B. | rat |
| C. | finch |
| D. | toad |
| Answer» D. toad | |
| 30. |
Which of the following is absent in Gram- negative bacteria and present in Gram- positive bacteria? |
| A. | Teichoic acids |
| B. | Periplasmic space |
| C. | Outer membrane |
| D. | Lipopolysaccharide |
| Answer» B. Periplasmic space | |
| 31. |
A branching diagram that shows evolutionary history is called |
| A. | diagram of life |
| B. | Punnett's square |
| C. | phylogenetic tree |
| D. | specie tree |
| Answer» D. specie tree | |
| 32. |
Reactions that lose heat are termed as _____________ |
| A. | endothermic |
| B. | exothermic |
| C. | chemical |
| D. | physical |
| Answer» C. chemical | |
| 33. |
Which of following scientist wrote famous book 'Origin of species'? |
| A. | Darwin |
| B. | Mendel |
| C. | Watson and crick |
| D. | Marie curie |
| Answer» B. Mendel | |
| 34. |
During translation of proteins, the aminoacyl tRNA arrives at ____________ |
| A. | Ribosomal A site |
| B. | Ribosomal P site |
| C. | Ribosomal T site |
| D. | Ribosomal S site |
| Answer» B. Ribosomal P site | |
| 35. |
How many molecules of ATP are formed per molecule of oxidation of glucose? |
| A. | 12 |
| B. | 24 |
| C. | 36 |
| D. | 48 |
| Answer» D. 48 | |
| 36. |
Which of the following RNA is artificially made? |
| A. | snRNA |
| B. | scRNA |
| C. | miRNA |
| D. | siRNA |
| Answer» C. miRNA | |
| 37. |
Rudolf Virchow, a German pathologist proposed the ___________________ |
| A. | cell theory |
| B. | first tenet of cell theory |
| C. | second tenet of cell theory |
| D. | third tenet of cell theory |
| Answer» E. | |
| 38. |
The electron clouds around the nucleus are of ___________ |
| A. | Spherical shape |
| B. | Spherical and Dumbbell shape |
| C. | Spherical and Hexagonal shape |
| D. | Cannot be determined |
| Answer» C. Spherical and Hexagonal shape | |
| 39. |
Cellular metabolism is a non-equilibrium metabolism. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 40. |
HIV antagonizes the ___________ cell in human body. |
| A. | Red Blood Cell (RBC) |
| B. | Cytotoxic T cell |
| C. | B cell |
| D. | Helper T cell |
| Answer» E. | |
| 41. |
Atoms or molecules having orbitals containing a single unpaired electron is known as ___________ |
| A. | Captions |
| B. | Anions |
| C. | Free radicals |
| D. | Carbocation |
| Answer» D. Carbocation | |
| 42. |
Which of the following viruses is found in saliva? |
| A. | HIV |
| B. | Dengue virus |
| C. | Hepatitis B virus |
| D. | Epstein-Barr virus (EBV virus) |
| Answer» E. | |
| 43. |
Mutations in non-coding regions of DNA that have no significant results are called |
| A. | neutral mutations |
| B. | silent mutations |
| C. | point mutations |
| D. | single nucleotide polymorphisms |
| Answer» B. silent mutations | |
| 44. |
Nitrogen fixation can be done by ______________ |
| A. | All prokaryotes |
| B. | Certain cyanobacteria |
| C. | Certain archaebacteria |
| D. | None of the mentioned |
| Answer» C. Certain archaebacteria | |
| 45. |
Parts of a cell can be isolated and cultured in a laboratory. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 46. |
The TCA cycle occurs in which region of a prokaryotic cell? |
| A. | cytosol |
| B. | mitochondria |
| C. | ribsomes |
| D. | golgi complex |
| Answer» B. mitochondria | |
| 47. |
Light energy is converted to chemical energy by photosynthesis and is stored in________________ |
| A. | Glial cells |
| B. | Mitochondria |
| C. | Proteins |
| D. | Carbohydrates |
| Answer» E. | |
| 48. |
A small population that is separated from original and taken to a new environment takes new features. This is called |
| A. | phenotypic effect |
| B. | mutagens |
| C. | genetic drift |
| D. | founders effect |
| Answer» E. | |
| 49. |
Pseudopeptidoglycan is a found in the cell wall of _______________ |
| A. | Fungi |
| B. | Archaea |
| C. | Bacteria |
| D. | Protozoa |
| Answer» C. Bacteria | |
| 50. |
Which of the following statements is correct according to Chargaff’s rules? |
| A. | All DNA molecules contain the same proportions of A, C, G and T |
| B. | Single-stranded RNA molecules contain the same amount of A and U |
| C. | In double-stranded DNA, the amount of T equals the amount of C |
| D. | In double-stranded DNA, the amount of G equals the amount of C |
| Answer» E. | |