Biology Kingdom Prokaryotes Test Online Mcqs

Malik TahirLast Updated: October 14, 2025

Important Biology Prokaryotes Question and Answer

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

Prokaryotes Practice Test Online With Explanation

Please wait...

0%

Page 1 of 2
Uncategorized

1. Which of the following best describes the DNA in prokaryotic cells?
Linear and enclosed in a nucleus
Circular and free in cytoplasm
Found in mitochondria
Present inside lysosomes

Loading...

2. Which of the following is a photosynthetic prokaryote?
Fungi
Cyanobacteria
Amoeba
Protozoa

Loading...

3. Which of the following components is absent in bacterial cells?
Nucleus
Cytoplasm
Ribosomes
Cell wall

Loading...

4. What is a plasmid?
A membrane
A protein factory
A small circular DNA molecule
A bacterial chromosome

Loading...

5. What is the shape of Streptococcus bacteria?
Spiral
Spherical in chains
Rod
Comma-shaped

Loading...

6. Which structure helps in bacterial conjugation?
Ribosomes
Capsule
Pili
Flagella

Loading...

7. What is the term for spherical-shaped bacteria?
Bacillus
Spirillum
Coccus
Vibrio

Loading...

8. Which of the following processes allows bacteria to resist unfavorable conditions?
Binary fission
Conjugation
Budding
Sporulation

Loading...

9. Which of the following is true for Gram-positive bacteria?
Have thin peptidoglycan layer
Retain crystal violet stain
Are always pathogenic
Have outer membrane

Loading...

10. Which of the following bacterial infections affects the lungs?
Tuberculosis
Cholera
Botulism
Typhoid

Loading...

11. Which bacterial structure can survive extreme conditions?
Capsule
Pili
Flagellum
Endospore

Loading...

12. What is the function of the bacterial flagellum?
DNA replication
Movement
Energy production
Protein synthesis

Loading...

13. Which of the following structures is found in all prokaryotic cells?
Cell wall
Chloroplast
Nucleus
Mitochondria

Loading...

14. Which enzyme is produced by bacteria to resist antibiotics like penicillin?
Penicillinase (Beta-lactamase)
Catalase
Protease
Lipase

Loading...

15. Which of the following is NOT a shape of bacteria?
Polygonal
Coccus
Bacillus
Spirillum

Loading...

16. Which method is used to sterilize surgical tools to kill bacteria?
Autoclaving
Boiling
Freezing
Pasteurization

Loading...

17. Which bacteria convert milk into yogurt?
Lactobacillus
Salmonella
Vibrio
E. coli

Loading...

18. What is the typical size range of most bacteria?
10–100 mm
100–1000 µm
1–10 µm
1–10 cm

Loading...

19. Which structure protects bacteria from harsh conditions?
Cytoplasm
Cell wall
Capsule
Ribosome

Loading...

20. Which of the following can survive boiling temperatures?
Gram-negative bacteria
Fungi
Endospores
Protozoa

Loading...

21. What kind of cell wall is found in Gram-negative bacteria?
Thin peptidoglycan with outer membrane
No peptidoglycan
Only cellulose
Thick peptidoglycan

Loading...

22. Which part of a prokaryotic cell contains the genetic material?
Nucleoid
Capsule
Nucleus
Ribosome

Loading...

23. Which of the following bacteria is beneficial to humans?
Salmonella
Lactobacillus
Vibrio cholerae
Mycobacterium tuberculosis

Loading...

24. Which method is used to grow bacteria in laboratories?
Culture in nutrient agar
DNA sequencing
PCR
Microscopy

Loading...

25. Which of the following is used in the preparation of antibiotics?
Viruses
Algae
Fungi and some bacteria
Bacteria only

Loading...

Page 2 of 2

26. Which type of bacteria requires oxygen to survive?
Obligate aerobes
Obligate anaerobes
Aerotolerant anaerobes
Facultative anaerobes

Loading...

27. The main difference between prokaryotes and eukaryotes is:
Presence of cytoplasm
Presence of nucleus
Presence of cell wall
Ability to reproduce

Loading...

28. Which of the following terms refers to bacteria that can survive without oxygen?
Anaerobic
Obligate aerobes
Facultative aerobes
Aerobic

Loading...

29. Which of these structures allows bacteria to exchange genetic material?
Ribosomes
Capsule
Pili
Flagella

Loading...

30. Which structure helps bacteria attach to surfaces?
Flagella
Pili
Ribosomes
Nucleoid

Loading...

31. How do bacteria reproduce?
Budding
Mitosis
Binary fission
Meiosis

Loading...

32. Which of the following is a harmful effect of bacteria?
Yogurt production
Tooth decay
Vitamin K synthesis
Nitrogen fixation

Loading...

33. Which of the following is a rod-shaped bacterium?
Vibrio
Coccus
Spirillum
Bacillus

Loading...

34. Which of these bacterial forms is involved in bioremediation?
Bacillus subtilis
Pseudomonas
Staphylococcus
E. coli

Loading...

35. Which bacteria is used in nitrogen fixation in legumes?
Rhizobium
E. coli
Salmonella
Vibrio cholerae

Loading...

36. Which bacteria is comma-shaped?
Spirillum
Coccus
Vibrio
Bacillus

Loading...

37. Which of the following is a function of bacterial capsule?
Protection against phagocytosis
DNA replication
Photosynthesis
Protein synthesis

Loading...

38. What is the purpose of Gram staining in bacteria?
To differentiate cell wall structure
To determine oxygen requirement
To identify plasmids
To measure bacterial size

Loading...

39. Which of the following is used to kill or inhibit bacteria?
Alcohol
Antibiotic
Hormones
Insulin

Loading...

40. Which type of bacteria converts nitrogen into a usable form for plants?
Lactobacillus
Cyanobacteria
Nitrogen-fixing bacteria
Vibrio

Loading...

41. Which of the following is used to classify bacteria?
Their RNA sequence
Their shape and Gram stain reaction
Their age
Their ability to photosynthesize

Loading...

42. Bacteria reproduce by:
Meiosis
Binary fission
Mitosis
Budding

Loading...

43. Which of the following bacteria is spiral-shaped?
Lactobacillus
Bacillus
Coccus
Spirillum

Loading...

44. Which of the following diseases is caused by bacteria?
Tuberculosis
Malaria
Influenza
AIDS

Loading...

45. What is the primary role of ribosomes in bacterial cells?
Protein synthesis
ATP production
Waste removal
DNA storage

Loading...

46. Which cellular structure is responsible for protein synthesis in bacteria?
Nucleoid
Capsule
Ribosomes
Pili

Loading...

47. Which bacterial cell structure is targeted by penicillin?
Plasma membrane
Cell wall
Capsule
Ribosomes

Loading...

48. Which of the following is a sexually transmitted bacterial disease?
AIDS
Dengue
Syphilis
Hepatitis B

Loading...

Loading...

<<
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
>>

More Related Resources

NTS NAT Biology Repeated MCQs 2026 ... 11th Class Biology Chapter 7 Short ... PPSC Syllabus for Biology Lecturer ... KPK 11th Class Biology Chapter 6 Pr...

Can't find what you're looking for? Search below:

Malik TahirLast Updated: October 14, 2025

22 Comments

Nida ali says:

October 19, 2022 at 9:55 pm

I got 92 percentage

Memoona Nawaz says:

July 30, 2022 at 2:28 pm

92%

Syed salam shah says:

April 19, 2022 at 7:21 am

92 mine percent of this test

Dia says:

March 11, 2021 at 1:00 am

Kya mdcat test m is app se question aty so kindly koi bata sakta h ??

Aon Abbas says:

October 26, 2020 at 10:19 pm

96%

Danish zia says:

July 8, 2017 at 7:03 am

93%

1. Malja Sehar says:
  
  May 24, 2022 at 3:48 pm
  
  Last mcq option is rod. How vibrio is classified in rod shaped bacteria.it should be none.Because vibrio is the type of spiral shaped bacteria.
  
sanafatima says:

July 3, 2017 at 9:07 am

100%…woohoooooo

salman says:

June 15, 2017 at 12:57 pm

80%

Nayaab says:

March 31, 2017 at 11:20 am

I want to get admission in d.pharm in comsats abbottabad. Can anyone tell me what was the last year’s closing merit for d.pharm in comsats??

Nayaab says:

March 3, 2017 at 8:17 pm

100%

KASHIF ISMAIL says:

July 27, 2016 at 8:26 pm

94%

1. Nayaab says:
  
  March 12, 2017 at 1:42 pm
  
  How did you get 94%?? :p If your one mcq is wrong then percentage will be 96 n if two then 92
  
  1. KASHIF ISMAIL says:
    
    March 31, 2017 at 11:05 am
    
    hi
    
naina khan says:

July 26, 2016 at 2:21 pm

96% woww

Hassan Fareed says:

April 19, 2016 at 12:07 am

Qstn 9 explain plz

Hassan Fareed says:

April 19, 2016 at 12:06 am

88%

Important Biology Prokaryotes Question and Answer

Prokaryotes Practice Test Online With Explanation

Uncategorized

More Related Resources

Latest Updates

Malik Tahir

22 Comments

Leave a Reply Cancel reply