Biology Kingdom Prokaryotes Test Online Mcqs

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Question 1

1. What is the purpose of Gram staining in bacteria?

Answer

To identify plasmids

Answer

To differentiate cell wall structure

Answer

To determine oxygen requirement

Answer

To measure bacterial size

Question 2

2. Which of the following is NOT a shape of bacteria?

Question 3

3. Which structure helps in bacterial conjugation?

Question 4

4. Which part of a prokaryotic cell contains the genetic material?

Question 5

5. Which of the following components is absent in bacterial cells?

Question 6

6. Which of these bacterial forms is involved in bioremediation?

Answer

Pseudomonas

Answer

Bacillus subtilis

Answer

Staphylococcus

Question 7

7. Bacteria reproduce by:

Answer

Binary fission

Question 8

8. Which method is used to grow bacteria in laboratories?

Answer

Microscopy

Answer

Culture in nutrient agar

Answer

DNA sequencing

Question 9

9. Which of the following bacteria is beneficial to humans?

Answer

Lactobacillus

Answer

Mycobacterium tuberculosis

Answer

Vibrio cholerae

Answer

Salmonella

Question 10

10. Which enzyme is produced by bacteria to resist antibiotics like penicillin?

Answer

Penicillinase (Beta-lactamase)

Question 11

11. Which of the following is used to classify bacteria?

Answer

Their shape and Gram stain reaction

Answer

Their ability to photosynthesize

Answer

Their RNA sequence

Question 12

12. Which of the following is a sexually transmitted bacterial disease?

Answer

Hepatitis B

Question 13

13. Which of the following processes allows bacteria to resist unfavorable conditions?

Answer

Sporulation

Answer

Conjugation

Answer

Binary fission

Question 14

14. Which of the following is a harmful effect of bacteria?

Answer

Vitamin K synthesis

Answer

Yogurt production

Answer

Tooth decay

Answer

Nitrogen fixation

Question 15

15. Which type of bacteria requires oxygen to survive?

Answer

Obligate anaerobes

Answer

Facultative anaerobes

Answer

Aerotolerant anaerobes

Answer

Obligate aerobes

Question 16

16. Which of these structures allows bacteria to exchange genetic material?

Question 17

17. Which bacteria convert milk into yogurt?

Answer

Salmonella

Answer

Lactobacillus

Question 18

18. Which of the following is a photosynthetic prokaryote?

Answer

Cyanobacteria

Question 19

19. What is the term for spherical-shaped bacteria?

Question 20

20. Which of the following is used in the preparation of antibiotics?

Answer

Bacteria only

Answer

Fungi and some bacteria

Question 21

21. What kind of cell wall is found in Gram-negative bacteria?

Answer

No peptidoglycan

Answer

Thin peptidoglycan with outer membrane

Answer

Thick peptidoglycan

Answer

Only cellulose

Question 22

22. Which of the following diseases is caused by bacteria?

Answer

Tuberculosis

Question 23

23. What is the function of the bacterial flagellum?

Answer

Energy production

Answer

Protein synthesis

Answer

DNA replication

Question 24

24. Which of the following best describes the DNA in prokaryotic cells?

Answer

Present inside lysosomes

Answer

Linear and enclosed in a nucleus

Answer

Circular and free in cytoplasm

Answer

Found in mitochondria

Question 25

25. Which method is used to sterilize surgical tools to kill bacteria?

Answer

Autoclaving

Answer

Pasteurization

Question 26

26. Which bacterial structure can survive extreme conditions?

Question 27

27. Which structure helps bacteria attach to surfaces?

Question 28

28. Which of the following is a rod-shaped bacterium?

Question 29

29. Which of the following is a function of bacterial capsule?

Answer

Photosynthesis

Answer

Protection against phagocytosis

Answer

DNA replication

Answer

Protein synthesis

Question 30

30. Which of the following bacterial infections affects the lungs?

Answer

Tuberculosis

Question 31

31. What is the typical size range of most bacteria?

Answer

10–100 mm

Answer

1–10 µm

Answer

100–1000 µm

Question 32

32. Which structure protects bacteria from harsh conditions?

Question 33

33. Which of the following structures is found in all prokaryotic cells?

Answer

Mitochondria

Answer

Chloroplast

Question 34

34. Which bacteria is used in nitrogen fixation in legumes?

Answer

Salmonella

Answer

Vibrio cholerae

Question 35

35. Which bacterial cell structure is targeted by penicillin?

Answer

Plasma membrane

Question 36

36. Which of the following is true for Gram-positive bacteria?

Answer

Are always pathogenic

Answer

Retain crystal violet stain

Answer

Have thin peptidoglycan layer

Answer

Have outer membrane

Question 37

37. How do bacteria reproduce?

Answer

Binary fission

Question 38

38. Which bacteria is comma-shaped?

Question 39

39. Which of the following terms refers to bacteria that can survive without oxygen?

Answer

Facultative aerobes

Answer

Obligate aerobes

Question 40

40. Which cellular structure is responsible for protein synthesis in bacteria?

Question 41

41. Which type of bacteria converts nitrogen into a usable form for plants?

Answer

Cyanobacteria

Answer

Nitrogen-fixing bacteria

Answer

Lactobacillus

Question 42

42. What is the primary role of ribosomes in bacterial cells?

Answer

Waste removal

Answer

ATP production

Answer

Protein synthesis

Answer

DNA storage

Question 43

43. The main difference between prokaryotes and eukaryotes is:

Answer

Presence of nucleus

Answer

Ability to reproduce

Answer

Presence of cytoplasm

Answer

Presence of cell wall

Question 44

44. What is the shape of Streptococcus bacteria?

Answer

Spherical in chains

Answer

Comma-shaped

Question 45

45. What is a plasmid?

Answer

A membrane

Answer

A protein factory

Answer

A bacterial chromosome

Answer

A small circular DNA molecule

Question 46

46. Which of the following can survive boiling temperatures?

Answer

Endospores

Answer

Gram-negative bacteria

Question 47

47. Which of the following is used to kill or inhibit bacteria?

Answer

Antibiotic

Question 48

48. Which of the following bacteria is spiral-shaped?

Answer

Lactobacillus

Question 49

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Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Biology Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Biology Interview Question Answer Universities Entrance Test

Biology Kingdom Prokaryotes Test Online Mcqs

Important Biology Prokaryotes Question and Answer

Prokaryotes Practice Test Online With Explanation

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Important Biology Prokaryotes Question and Answer

Prokaryotes Practice Test Online With Explanation

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