MCQOPTIONS
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MCQOPTIONS
This section includes 122 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. |
When phages carry DNA from one host to another its called |
| A. | dead |
| B. | transformed |
| C. | transfected |
| D. | transduction |
| Answer» E. | |
| 2. |
Bacteria living in gut of humans that help with digestion have which of following relationship with host? |
| A. | parasitism |
| B. | symbiosis |
| C. | mutualism |
| D. | commensalism |
| Answer» D. commensalism | |
| 3. |
Which of following bacteria can photosynthesize? |
| A. | cyanobacteria |
| B. | treponema pallidum |
| C. | salmonella |
| D. | Nongonococcal urethritis |
| Answer» B. treponema pallidum | |
| 4. |
Cocci present in clusters are called |
| A. | staphylococci |
| B. | monococci |
| C. | diplococci |
| D. | streptococci |
| Answer» B. monococci | |
| 5. |
From which of following subgroups of proteobacteria mitochondria have most likely been derived? |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | epsilon |
| Answer» B. beta | |
| 6. |
Which of following bacteria play a part in nitrogen recycling? |
| A. | rhizobium |
| B. | Nitrosomonas |
| C. | agrobacterium |
| D. | e coli |
| Answer» C. agrobacterium | |
| 7. |
Which of following disease in humans is caused by bacteria Helicobacter? |
| A. | damage to blood vessels |
| B. | stomach ulcer |
| C. | blood poisoning |
| D. | blocked vessels |
| Answer» C. blood poisoning | |
| 8. |
Which of following rarely have introns in their genes? |
| A. | animals |
| B. | bacteria |
| C. | archaea |
| D. | fungi |
| Answer» C. archaea | |
| 9. |
Which of following structures is produced by help of F factor? |
| A. | Pilli |
| B. | filaments |
| C. | hair |
| D. | fimbriae |
| Answer» B. filaments | |
| 10. |
When a prokaryote takes up foreign DNA from surroundings its called |
| A. | mutant |
| B. | dead |
| C. | transformed |
| D. | transfected |
| Answer» D. transfected | |
| 11. |
A movement based on a stimulus is called |
| A. | Pilli |
| B. | pull |
| C. | stimulus |
| D. | taxis |
| Answer» E. | |
| 12. |
Membrane lipids of which of following have branched hydrocarbons? |
| A. | archaea |
| B. | prokaryotes |
| C. | fungi |
| D. | animals |
| Answer» B. prokaryotes | |
| 13. |
What is average diameter of one of smallest bacteria, Mycoplasma? |
| A. | 5 um |
| B. | 1 um |
| C. | 0.1 um |
| D. | 10 um |
| Answer» D. 10 um | |
| 14. |
Which of following is an example of filamentous cyanobacterium? |
| A. | Borrelia burgdorferi |
| B. | Leptospira |
| C. | oscillatoria |
| D. | Thiomargarita namibiensis |
| Answer» D. Thiomargarita namibiensis | |
| 15. |
Which of following is not a part of bacterial flagellum? |
| A. | motor |
| B. | tail |
| C. | hook |
| D. | filament |
| Answer» C. hook | |
| 16. |
Horizontal gene transfer occurs from |
| A. | one organism to another |
| B. | replication |
| C. | reproduction |
| D. | ancestors |
| Answer» B. replication | |
| 17. |
Which of following bacteria are responsible for causing cholera? |
| A. | salmonella |
| B. | neisseria gonorrhoeae. |
| C. | Thiomargarita namibiensis |
| D. | vibrio cholerae |
| Answer» E. | |
| 18. |
Cocci present in pairs are called |
| A. | diplococci |
| B. | streptococci |
| C. | staphylococci |
| D. | gonococci |
| Answer» B. streptococci | |
| 19. |
Which of following is contained by most of bacteria? |
| A. | proteins |
| B. | peptidoglycan |
| C. | proteoglycan |
| D. | sugars |
| Answer» C. proteoglycan | |
| 20. |
Gram-negative bacteria are classified in to which of following clades? |
| A. | archaea |
| B. | eukaryote |
| C. | proteobacteria |
| D. | photoautotroph |
| Answer» D. photoautotroph | |
| 21. |
What is larger organism in Asymbiotic relationship? |
| A. | host |
| B. | symbiont |
| C. | provider |
| D. | supporter |
| Answer» B. symbiont | |
| 22. |
Cyanobacteria is an example of which of following? |
| A. | phototrophs |
| B. | heterotrophs |
| C. | Chemotrophs |
| D. | autotrophs |
| Answer» B. heterotrophs | |
| 23. |
Which of following can survive without oxygen? |
| A. | facultative anaerobes |
| B. | obligate aerobes |
| C. | obligate anaerobes |
| D. | heterotrophs |
| Answer» B. obligate aerobes | |
| 24. |
Which of following bacteria is most common cause of blindness in world? |
| A. | chlamydia trachomatis |
| B. | salmonella |
| C. | Bdellovibrios |
| D. | Thiomargarita namibiensis |
| Answer» B. salmonella | |
| 25. |
Which of following bacteria is not an example of spirochetes? |
| A. | treponema pallidum |
| B. | Borrelia burgdorferi |
| C. | Leptospira |
| D. | salmonella |
| Answer» E. | |
| 26. |
Which of following disease in humans is caused by bacteria Campylobacter? |
| A. | damage to neurons |
| B. | blood poisoning |
| C. | stomach ulcer |
| D. | neurodegeneration |
| Answer» C. stomach ulcer | |
| 27. |
Which of following are appendages that facilitate conjugation? |
| A. | pilus |
| B. | flagella |
| C. | pseudomonas |
| D. | cilia |
| Answer» B. flagella | |
| 28. |
When DNA is transferred between two individuals of same species its called |
| A. | transformed |
| B. | transfected |
| C. | transduction |
| D. | conjugation |
| Answer» E. | |
| 29. |
Which of following bacteria produce tumors in plants? |
| A. | agrobacterium |
| B. | rhizobium |
| C. | Nitrosomonas |
| D. | Thiomargarita namibiensis |
| Answer» B. rhizobium | |
| 30. |
Approximately how many genes have been horizontally transferred in bacterial genome? |
| A. | 0.05 |
| B. | 0.18 |
| C. | 0.3 |
| D. | 0.75 |
| Answer» E. | |
| 31. |
Which of following diseases is caused by Bacillus anthracis? |
| A. | flu |
| B. | common cold |
| C. | tuberculosis |
| D. | anthrax |
| Answer» E. | |
| 32. |
Our intestines are home to how many species of bacteria? |
| A. | 1000 |
| B. | 200 |
| C. | 10000 |
| D. | 100 |
| Answer» B. 200 | |
| 33. |
Which of following bacterial types have large amounts of peptidoglycans in their cell walls? |
| A. | gram positive |
| B. | gram negative |
| C. | infectious |
| D. | lytic phages |
| Answer» B. gram negative | |
| 34. |
Which of following bacteria is coil-shaped? |
| A. | monococci |
| B. | diplococci |
| C. | spirochetes |
| D. | spirilla |
| Answer» E. | |
| 35. |
Which of following archaea live in extremely hot and sulphuric conditions like volcanoes? |
| A. | treponema pallidum |
| B. | Halobacterium |
| C. | Sulfolobus |
| D. | Nongonococcal urethritis |
| Answer» D. Nongonococcal urethritis | |
| 36. |
Borrelia burgdorferi causes which of following diseases? |
| A. | stomach ulcer |
| B. | blood poisoning |
| C. | blocked vessels |
| D. | Lyme disease |
| Answer» E. | |
| 37. |
Rhizobium belongs to which of following proteobacteria subgroup? |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | epsilon |
| Answer» B. beta | |
| 38. |
Which of following is a diarrheal disease? |
| A. | Lyme disease |
| B. | tuberculosis |
| C. | anthrax |
| D. | cholera |
| Answer» E. | |
| 39. |
Which of following is an example of nitrogen-fixing bacteria? |
| A. | Rhodobacter |
| B. | t phage |
| C. | e coli |
| D. | cyanobacteria |
| Answer» E. | |
| 40. |
Ammonium is oxidized to produce which of following by Nitrosomonas? |
| A. | methyl |
| B. | nitrogen |
| C. | nitrite |
| D. | nitrate |
| Answer» D. nitrate | |
| 41. |
Picrophilus oshimae bacteria can survive in which of following extreme conditions? |
| A. | CO₂ |
| B. | acidic environment |
| C. | radiation |
| D. | heat |
| Answer» C. radiation | |
| 42. |
Bacteria obtain energy from which of following forms of sulfur? |
| A. | h2s |
| B. | hs2 |
| C. | sulphuric acid |
| D. | sulphur nitrate |
| Answer» B. hs2 | |
| 43. |
How many types of proteins make up a flagellum? |
| A. | 30 |
| B. | 42 |
| C. | 69 |
| D. | 100 |
| Answer» C. 69 | |
| 44. |
Nitrogen fixation is caused by which of following? |
| A. | phototrophs |
| B. | heterotrophs |
| C. | halophiles |
| D. | heterocyst |
| Answer» B. heterotrophs | |
| 45. |
Streptomyces is soil-dwelling species of which of following bacterial types? |
| A. | gram positive |
| B. | gram negative |
| C. | cyanobacteria |
| D. | spirochetes |
| Answer» B. gram negative | |
| 46. |
Smaller rings of genomic DNA in Prokaryotes are called |
| A. | plasmid |
| B. | nucleoid |
| C. | nucleolus |
| D. | ribosomes |
| Answer» B. nucleoid | |
| 47. |
Which of following are harmful proteins secreted by bacteria? |
| A. | exotoxins |
| B. | endotoxins |
| C. | lipopolysaccharide |
| D. | proteoglycans |
| Answer» B. endotoxins | |
| 48. |
Which of following are present in outer cell wall of gram-negative bacteria and are released when bacteria die? |
| A. | exotoxins |
| B. | endotoxins |
| C. | lipopolysaccharide |
| D. | proteoglycans |
| Answer» C. lipopolysaccharide | |
| 49. |
Which of following bacteria is an example of slime secreting myxobacteria? |
| A. | Chondromyces crocatus |
| B. | neisseria gonorrhoeae. |
| C. | Thiomargarita namibiensis |
| D. | vibrio cholerae |
| Answer» B. neisseria gonorrhoeae. | |
| 50. |
Mycoplasma genitalium has approximately how many genes? |
| A. | 100 |
| B. | 343 |
| C. | 1000 |
| D. | 517 |
| Answer» E. | |