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. |
How long is diameter of Thiomargarita namibiensis? |
| A. | 750 um |
| B. | 100 um |
| C. | 10 um |
| D. | 5000um |
| Answer» B. 100 um | |
| 2. |
An ecological relationship in which one participant benefits and other is not affected is called |
| A. | symbiosis |
| B. | mutualism |
| C. | commensalism |
| D. | parasitism |
| Answer» D. parasitism | |
| 3. |
Which of following bacteria is cork screw shaped? |
| A. | diplococci |
| B. | spirilla |
| C. | streptococci |
| D. | spirochetes |
| Answer» E. | |
| 4. |
Which of following is an example of spirochetes? |
| A. | Nongonococcal urethritis |
| B. | Borrelia burgdorferi |
| C. | Bdellovibrios |
| D. | Thiomargarita namibiensis |
| Answer» C. Bdellovibrios | |
| 5. |
Prokaryotic cells typically have a diameter of about how many micrometers? |
| A. | 5 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» B. 100 | |
| 6. |
First organisms to inhabit earth were |
| A. | prokaryotes |
| B. | eukaryotes |
| C. | animals |
| D. | plants |
| Answer» B. eukaryotes | |
| 7. |
Cocci present in chains are called |
| A. | monococci |
| B. | diplococci |
| C. | streptococci |
| D. | staphylococci |
| Answer» D. staphylococci | |
| 8. |
Methanogens release which of following compounds as a by-product of their metabolism? |
| A. | ammonia |
| B. | sulphur |
| C. | methane |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 9. |
Which of following scientists invented Gram stain technique? |
| A. | Mendel |
| B. | Watson |
| C. | Hans Christian |
| D. | Marie curie |
| Answer» D. Marie curie | |
| 10. |
From which of following Chemotroph organisms obtain energy? |
| A. | oxygen |
| B. | sulphur |
| C. | chemicals |
| D. | CO₂ |
| Answer» D. CO₂ | |
| 11. |
An ecological relationship in which both participants benefit is called |
| A. | mutualism |
| B. | commensalism |
| C. | parasitism |
| D. | symbiosis |
| Answer» B. commensalism | |
| 12. |
Why is an extreme thermophile found in hydrothermal vents named as 'strain 121'? |
| A. | it can reproduce at 121 °C |
| B. | it has 121 genes |
| C. | it has 121 strains |
| D. | it produces 121 types of proteins |
| Answer» B. it has 121 genes | |
| 13. |
Which of following bacteria cause syphilis? |
| A. | treponema pallidum |
| B. | salmonella |
| C. | Bdellovibrios |
| D. | Nongonococcal urethritis |
| Answer» B. salmonella | |
| 14. |
Which of following disease is caused by Salmonella typhi? |
| A. | typhoid |
| B. | Lyme disease |
| C. | tuberculosis |
| D. | anthrax |
| Answer» B. Lyme disease | |
| 15. |
Harmless bacteria living on skin of humans feeding off sebum have which of following ecological relationship? |
| A. | mutualism |
| B. | commensalism |
| C. | parasitism |
| D. | symbiosis |
| Answer» C. parasitism | |
| 16. |
Which of following is an example of sulfur bacteria? |
| A. | Nitrosomonas |
| B. | agrobacterium |
| C. | neisseria gonorrhoeae. |
| D. | Thiomargarita namibiensis |
| Answer» E. | |
| 17. |
Which of following has been used in producing transgenic plants? |
| A. | Streptomyces |
| B. | Borrelia burgdorferi |
| C. | Leptospira |
| D. | agrobacterium tumefaciens |
| Answer» E. | |
| 18. |
Which of following have only one kind of RNA polymerase? |
| A. | bacteria |
| B. | archaea |
| C. | fungi |
| D. | plants |
| Answer» B. archaea | |
| 19. |
Deinococcus radiodurans can survive in which of following extreme conditions? |
| A. | heat |
| B. | CO₂ |
| C. | ph |
| D. | radiation |
| Answer» E. | |
| 20. |
'marsh gas' present in marches is actually |
| A. | carbon dioxide |
| B. | methane |
| C. | sulphuric acid |
| D. | nitrogen |
| Answer» C. sulphuric acid | |
| 21. |
Lyme disease is carried by which of following vectors? |
| A. | mosquito |
| B. | ticks |
| C. | cows |
| D. | spiders |
| Answer» C. cows | |
| 22. |
Which of following archaea is used as source of DNA polymerase for use in laboratory experiments? |
| A. | treponema pallidum |
| B. | Halobacterium |
| C. | Borrelia burgdorferi |
| D. | Pyrococcus furiosus |
| Answer» E. | |