MCQOPTIONS
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MCQOPTIONS
This section includes 67 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Due to lack of protoplasm, these are not considered cells |
| A. | bacteria |
| B. | virus |
| C. | fungi |
| D. | algae |
| Answer» C. fungi | |
| 2. |
Cell membrane of a bacteria invaginates in to cytoplasm and form a structure called |
| A. | mesosomes |
| B. | ribosomes |
| C. | spores |
| D. | plasmids |
| Answer» B. ribosomes | |
| 3. |
Procedures which help to eliminate or reduce possibility of infection is called |
| A. | antisepsis |
| B. | antiseptics |
| C. | antibodies |
| D. | anti inflammatory |
| Answer» B. antiseptics | |
| 4. |
Dormant, resistant bodies which develop during differentiation of vegetative cells are |
| A. | pili |
| B. | cysts |
| C. | buds |
| D. | spores |
| Answer» C. buds | |
| 5. |
Other name for "blue green algae" is |
| A. | cyanobacteria |
| B. | green bacteria |
| C. | blue bacteria |
| D. | brunobacteria |
| Answer» B. green bacteria | |
| 6. |
Example of rod-shaped viruses include |
| A. | Influenza virus |
| B. | Bacteriophages |
| C. | Tobacco mosaic virus |
| D. | Norwalk virus |
| Answer» D. Norwalk virus | |
| 7. |
Bacteria which are fully dependent on their host for its nutrition are |
| A. | parasites |
| B. | chemosynthetic |
| C. | photosynthetic |
| D. | respiratic |
| Answer» B. chemosynthetic | |
| 8. |
Chemical substances which act as inhibitor for growth of microorganisms are called |
| A. | antibodies |
| B. | antiseptics |
| C. | antibiotics |
| D. | anti inflammatory |
| Answer» C. antibiotics | |
| 9. |
Chemotherapeutic chemical substances which are used to treat infectious diseases are |
| A. | antibseptics |
| B. | antibiotics |
| C. | antifungal |
| D. | anti inflammatory |
| Answer» C. antifungal | |
| 10. |
Antoine Van Leeuwenhoek described microbes as bacteria and protozoa and called them as |
| A. | animalcules |
| B. | macromolecules |
| C. | micromolecules |
| D. | planolecules |
| Answer» B. macromolecules | |
| 11. |
Viruses can only be destroyed by |
| A. | antibodies present in blood of host's body |
| B. | white blood cells present in host's body |
| C. | red blood cells present in host's body |
| D. | antibodies and white blood cells present in host's body |
| Answer» E. | |
| 12. |
Metabolically dormant bodies of bacteria are resistant to adverse physical environmental conditions are the |
| A. | spores |
| B. | mesosome |
| C. | ribosomes |
| D. | plasmids |
| Answer» B. mesosome | |
| 13. |
Viruses attacking the bacterial cells are |
| A. | bacterioplasts |
| B. | bacteriocytes |
| C. | bacteriophages |
| D. | saprophytes |
| Answer» D. saprophytes | |
| 14. |
Green sulphur bacteria and purple sulphur bacteria are examples of |
| A. | photosynthetic bacteria |
| B. | chemosynthetic bacteria |
| C. | heterotrophic |
| D. | autotrophic |
| Answer» B. chemosynthetic bacteria | |
| 15. |
Type of bacteria which is spherical in shape and possesses several distinct arrangements based on planes of division is |
| A. | cocci |
| B. | bacilli |
| C. | Spirillum |
| D. | helical |
| Answer» B. bacilli | |
| 16. |
Robert Koch formulated germ theory of disease and discovered that specific bacteria which caused Tuberculosis and |
| A. | epilepsy |
| B. | Cholera |
| C. | pneumonia |
| D. | cancer |
| Answer» C. pneumonia | |
| 17. |
Appendages of bacteria which are hollow, non-helical and filamentous are called |
| A. | villi |
| B. | pili |
| C. | vibrio |
| D. | spirochete |
| Answer» C. vibrio | |
| 18. |
Trachome splits near to heterocyst and helps in fragmentation by formation of |
| A. | trachom divisiom |
| B. | metagonia |
| C. | harmogonia |
| D. | archegonia |
| Answer» D. archegonia | |
| 19. |
Rocky coastlines in intertidal zone have common algae called |
| A. | green algae |
| B. | brown algae |
| C. | brown green algae |
| D. | yellow algae |
| Answer» C. brown green algae | |
| 20. |
Campylobacter require a very low concentration of oxygen for growth therefore it is called as |
| A. | microaerophillic |
| B. | macroaerophilic |
| C. | aerobic |
| D. | anaerobic |
| Answer» B. macroaerophilic | |
| 21. |
Reserve food material in cyanobacteria is |
| A. | proteins |
| B. | sugar |
| C. | peptidoglycan |
| D. | glycogen |
| Answer» E. | |
| 22. |
Microorganisms could cause disease, was proved by |
| A. | Robert Hook |
| B. | Herbert Copeland |
| C. | Louis Pasteur |
| D. | John hogg |
| Answer» D. John hogg | |
| 23. |
Thick walled, enlarged vegetative cells which accumulate food are called as |
| A. | cytokinesis |
| B. | Akinetes |
| C. | endokinetes |
| D. | exokinetes |
| Answer» C. endokinetes | |
| 24. |
A disease which is transmitted to people by bites from rabid dogs and cats is |
| A. | rabies |
| B. | mental retardness |
| C. | fever |
| D. | epilepsy |
| Answer» B. mental retardness | |
| 25. |
A thick rigid spiral is called |
| A. | vibrio |
| B. | Spirrilum |
| C. | spirochete |
| D. | baccili |
| Answer» C. spirochete | |
| 26. |
Protein factories of bacteria are |
| A. | mesosomes |
| B. | ribosomes |
| C. | spores |
| D. | plasmids |
| Answer» C. spores | |
| 27. |
Number of bacteria and its kinds vary with respect to changes in locality and |
| A. | size |
| B. | environment |
| C. | shape |
| D. | material |
| Answer» B. environment | |
| 28. |
The flagellum is not found in |
| A. | non-motile bacterium |
| B. | motile bacterium |
| C. | non-motile virus |
| D. | motile virus |
| Answer» B. motile bacterium | |
| 29. |
Spherical viruses are |
| A. | tobacco mosaic virus |
| B. | bacteriophages |
| C. | influenza virus |
| D. | spiral in shape |
| Answer» D. spiral in shape | |
| 30. |
Definite but changeable shape is given to ciliates by its outer covering called a |
| A. | cell wall |
| B. | pedicle |
| C. | pellicle |
| D. | cell membrane |
| Answer» D. cell membrane | |
| 31. |
Effect that instantly kills microbes is |
| A. | sterilization |
| B. | microbicidal |
| C. | antiseptic |
| D. | antibiotic |
| Answer» C. antiseptic | |
| 32. |
Under suitable conditions, the mycelia threads grow |
| A. | in the host cells |
| B. | undergo binary fissions |
| C. | grow over the substratum |
| D. | form spores for later reproduction |
| Answer» D. form spores for later reproduction | |
| 33. |
Microbiologists have divided bacteria in to two major groups eubacteria and |
| A. | prokaryotic bacteria |
| B. | archaeobacteria |
| C. | free bacteria |
| D. | inverted bacteria |
| Answer» C. free bacteria | |
| 34. |
Transfer of genes from one species to another can be studied through |
| A. | bacteria |
| B. | vectors |
| C. | fungi |
| D. | algae |
| Answer» C. fungi | |
| 35. |
Shield of macromolecules which provides greater pathogenicity to bacteria and protect them against phagocytosis is known as |
| A. | capsule |
| B. | slime |
| C. | cell wall |
| D. | pili |
| Answer» C. cell wall | |
| 36. |
If there is a tuft of flagella on both two poles of bacteria, it is called as |
| A. | Amphitrichous |
| B. | lophotrichous |
| C. | monotrichous |
| D. | peritrichous |
| Answer» B. lophotrichous | |
| 37. |
Viruses are not considered cells because they |
| A. | cannot divide |
| B. | do not have a nucleus |
| C. | do not have a protoplasm |
| D. | are non-living things |
| Answer» D. are non-living things | |
| 38. |
Cyanobacteria use accessory pigments called |
| A. | glycogen |
| B. | phycobilins |
| C. | trichomes |
| D. | vibrio |
| Answer» C. trichomes | |
| 39. |
Just beneath cell membrane there are extremely thin hair like appendages called as |
| A. | flame cell |
| B. | pili |
| C. | villi |
| D. | flagella |
| Answer» E. | |
| 40. |
Pseudomonas is an example of bacteria which is |
| A. | aerobic |
| B. | anaerobic |
| C. | facultative |
| D. | parasitic |
| Answer» B. anaerobic | |
| 41. |
If division of cell takes place in three planes it will produce a cube of 8 cocci which is named as |
| A. | tetrad |
| B. | sarcina |
| C. | spiral |
| D. | helical |
| Answer» C. spiral | |
| 42. |
Majority of bacteria possesses a unique macromolecule known as |
| A. | glycan |
| B. | glycogen |
| C. | peptidoglycan |
| D. | peptoglycan |
| Answer» D. peptoglycan | |
| 43. |
Chains of cells which are surrounded by mucilaginous sheet are called |
| A. | trichomes |
| B. | dichomes |
| C. | tetrachomes |
| D. | tetrad |
| Answer» B. dichomes | |
| 44. |
Misuse of antibiotic streptomycin can cause |
| A. | dumb |
| B. | deafness |
| C. | mental retardness |
| D. | memory loss |
| Answer» C. mental retardness | |
| 45. |
Bacteria can range in size from 0.1µm to |
| A. | 600µm |
| B. | 400µm |
| C. | 300µm |
| D. | 100µm |
| Answer» B. 400µm | |
| 46. |
Bacteria reproduces asexually by process of |
| A. | multiple fission |
| B. | budding |
| C. | binary fission |
| D. | trinary fusion |
| Answer» C. binary fission | |
| 47. |
A thin flexible spiral is known as spirochete |
| A. | vibrio |
| B. | Spirrilum |
| C. | spirochete |
| D. | baccili |
| Answer» D. baccili | |
| 48. |
Flagellates rely on dead or decomposing organic matter to obtain its |
| A. | food |
| B. | air |
| C. | water |
| D. | transport |
| Answer» B. air | |
| 49. |
Flagella respond to chemical signals by movement with help of flagella, this behavior is called as |
| A. | chemotaxis |
| B. | phototaxis |
| C. | thermotaxis |
| D. | hypotaxis |
| Answer» B. phototaxis | |
| 50. |
A huge bacterium has been discovered in intestine of brown surgeonfish and its size grow as large as 600µm by |
| A. | 60µm |
| B. | 80µm |
| C. | 40µm |
| D. | 20µm |
| Answer» C. 40µm | |