Biology Kingdom Prokaryotes Test Online Mcqs

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Question 1

1. Which structure helps in bacterial conjugation?

Question 2

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

Answer

Tooth decay

Answer

Yogurt production

Answer

Nitrogen fixation

Answer

Vitamin K synthesis

Question 3

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

Answer

Have thin peptidoglycan layer

Answer

Have outer membrane

Answer

Retain crystal violet stain

Answer

Are always pathogenic

Question 4

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

Answer

Bacillus subtilis

Answer

Staphylococcus

Answer

Pseudomonas

Question 5

5. Which structure protects bacteria from harsh conditions?

Question 6

6. What is a plasmid?

Answer

A membrane

Answer

A bacterial chromosome

Answer

A protein factory

Answer

A small circular DNA molecule

Question 7

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

Question 8

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

Question 9

9. Which bacteria is comma-shaped?

Question 10

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

Answer

To determine oxygen requirement

Answer

To measure bacterial size

Answer

To differentiate cell wall structure

Answer

To identify plasmids

Question 11

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

Answer

Nitrogen-fixing bacteria

Answer

Cyanobacteria

Answer

Lactobacillus

Question 12

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

Answer

Tuberculosis

Question 13

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

Answer

Tuberculosis

Question 14

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

Answer

Pasteurization

Answer

Autoclaving

Question 15

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

Answer

Chloroplast

Answer

Mitochondria

Question 16

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

Answer

Thick peptidoglycan

Answer

Thin peptidoglycan with outer membrane

Answer

No peptidoglycan

Answer

Only cellulose

Question 17

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

Question 18

18. What is the shape of Streptococcus bacteria?

Answer

Comma-shaped

Answer

Spherical in chains

Question 19

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

Answer

Facultative aerobes

Answer

Obligate aerobes

Question 20

20. Which structure helps bacteria attach to surfaces?

Question 21

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

Answer

Antibiotic

Question 22

22. Which bacterial cell structure is targeted by penicillin?

Answer

Plasma membrane

Question 23

23. What is the function of the bacterial flagellum?

Answer

DNA replication

Answer

Energy production

Answer

Protein synthesis

Question 24

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

Question 25

25. Which type of bacteria requires oxygen to survive?

Answer

Aerotolerant anaerobes

Answer

Facultative anaerobes

Answer

Obligate anaerobes

Answer

Obligate aerobes

Question 26

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

Answer

Salmonella

Answer

Vibrio cholerae

Question 27

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

Question 28

28. The main difference between prokaryotes and eukaryotes is:

Answer

Presence of cell wall

Answer

Ability to reproduce

Answer

Presence of cytoplasm

Answer

Presence of nucleus

Question 29

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

Answer

Present inside lysosomes

Answer

Linear and enclosed in a nucleus

Answer

Found in mitochondria

Answer

Circular and free in cytoplasm

Question 30

30. Which bacterial structure can survive extreme conditions?

Question 31

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

Answer

Bacteria only

Answer

Fungi and some bacteria

Question 32

32. Which of the following can survive boiling temperatures?

Answer

Endospores

Answer

Gram-negative bacteria

Question 33

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

Answer

Binary fission

Answer

Conjugation

Answer

Sporulation

Question 34

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

Answer

Their RNA sequence

Answer

Their shape and Gram stain reaction

Answer

Their ability to photosynthesize

Question 35

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

Question 36

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

Answer

DNA sequencing

Answer

Microscopy

Answer

Culture in nutrient agar

Question 37

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

Answer

Waste removal

Answer

ATP production

Answer

DNA storage

Answer

Protein synthesis

Question 38

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

Question 39

39. Which of the following is a photosynthetic prokaryote?

Answer

Cyanobacteria

Question 40

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

Answer

Protection against phagocytosis

Answer

DNA replication

Answer

Photosynthesis

Answer

Protein synthesis

Question 41

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

Answer

Mycobacterium tuberculosis

Answer

Vibrio cholerae

Answer

Salmonella

Answer

Lactobacillus

Question 42

42. How do bacteria reproduce?

Answer

Binary fission

Question 43

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

Answer

Lactobacillus

Question 44

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

Answer

Penicillinase (Beta-lactamase)

Question 45

45. Bacteria reproduce by:

Answer

Binary fission

Question 46

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

Answer

Hepatitis B

Question 47

47. Which bacteria convert milk into yogurt?

Answer

Lactobacillus

Answer

Salmonella

Question 48

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

Answer

10–100 mm

Answer

1–10 µm

Answer

100–1000 µm

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

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