Bacteria MCQs online test 1

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Test Details:

Subject: Biology
Class: 1st year or 11
Chapter name: Bacteria
Test: MDCAT 2023
Book: Sindh Textbook
Total No. Of MCQS: 50
Time Allowed: 50 Minutes

489

Created on July 12, 2023 By

medicoengineer.com

Mdcat Biology XI Bacteria Mcqs test 1

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NameEmailPhone Number

1 / 50

1. How gram negative bacteria differ from gram positive bacteria?

a) In having wall without lipids

b) In having complex wall

c) In having simple wall

d) none

2 / 50

2. _______ are used to transfer genetic material during conjugation.

a) Bacterial Fimbriae

b) Bacterial Pili

c) Bacterial Flagellum

d) A and B

3 / 50

3. Cyst formation is generally observed in:

a) Rhizobium radicicola

b) Azotobacter species

c) Cyanobacteria

d) All of these

4 / 50

4. Bacteria that are intermediate to spiral and rod shape are known as:

a) Coccobacillus

b) Vibrio

c) Spirillum

d) Diplobacillus

5 / 50

5. Bacterial flagellum consists of how many part(s)?

a) Four parts

b) Three parts

c) Two parts

d) Only one long thread

6 / 50

6. The chain of many spherical cells, such bacteria are known as:

a) Sarcina

b) Streptobacillus

c) Streptococci

d) Staphylococcus

7 / 50

7. Peptidoglycan layer is found in much concentration in:

a) Gram-positive bacteria

b) Gram-negative bacteria

c) Fungi

d) Algae

8 / 50

8. Chill, cough and pleuritic pain with rusty sputum are the symptoms of:

a) T.B

b) Typhoid

c) Pneumonia

d) Cholera

9 / 50

9. What is true about actinomycetes?

a) It is a group of spore forming bacteria

b) Gram positive bacteria

c) Can grow by filaments

d) All of these

10 / 50

10. Which one of the following options represents bacterial appendages?

a) Pili

b) Flagella

c) Fimbriae

d) All of these

11 / 50

11. What is true about bacterial flagellum?

a) It is composed of microtubules.

b) It is non-contractile.

c) It is present in all types of bacteria.

d) All of these

12 / 50

12. Which of the following is related to gram-positive bacteria?

a) Outer membrane

b) Periplasmic space present

c) Teichoic acid

d) B and C

13 / 50

13. Generally, the shape of a bacterial cell is:

a) Determined by cell membrane

b) Determined by cell wall

c) Determined by ribosomes

d) None of these

14 / 50

14. A complex outer layer of cell wall consisting of lipopolysaccharide and lipoprotein is found in:

a) Gram negative bacteria

b) Gram positive bacteria

c) All types of bacteria

d) A and B

15 / 50

15. Certain rod-shaped bacteria have spherical ends like-cocci; such bacteria are called:

a) Staphylococcus

b) Pleomorphic

c) Bacillospiral

d) Coccobacilli

16 / 50

16. What is general chemical composition of glycocalyx?

a) Peptidoglycan in nature.

b) Cellulose in nature.

c) Polysaccharide in nature.

d) Lipoprotein in nature.

17 / 50

17. Which one of the following bacteria can change its shape between helical and spherical form?

a) E. coli

b) Pneumococcus

c) Helicobacter pylori Helicobacter pylori

d) Mycoplasma

18 / 50

18. Diplococci bacteria are formed due to:

a) Single (vertical) plane of cell division

b) Single (horizontal) plane of cell division

c) Double (vertical) plane of cell division

d) Double (horizontal) plane of cell division

19 / 50

19. What is the length of bacterial flagellum?

a) Up to 0.2 um in length

b) Up to 2 um in length

c) Up to 10 um in length

d) Up to 20 um in length

20 / 50

20. Many digestive enzymes and proteins that can destroy harmful

substances are present in:

a) Phospholipid bilayer

b) Periplasmic space

c) Plasmids

d) Cytoplasm

21 / 50

21. Certain microorganisms are involved in removal of environmental pollutants; and are involved in:

a) Cleaning of oil contamination

b) Cleaning of radioactive waste contamination

c) Cleaning of oil mercury contamination

d) All of these

22 / 50

22. The bacterium lacking cell wall is:

a) Bacillus

b) Mycoplasma

c) Escherichia coli

d) None, as all of these have cell wall

23 / 50

23. In bacteria, the structures that are shorter in length and are used for attachment are:

a) Pili

b) Fimbriae

c) Cilia

d) A and B

24 / 50

24. Escherichia coli bacterium is

a) Sphere-shaped

b) Rod-shaped

c) Coil-shaped

d) Comma-shaped

25 / 50

25. Attachment on the surface of tissues of an infected person occurs by the help of:

a) Bacterial Fimbriae

b) Bacterial Pili

c) Bacterial Flagellum

d) A and B

26 / 50

26. By three plane of cell divisions, bacteria appear in ____ called ____.

a) Cubical arrangement of eight cells; Tetrads

b) Square arrangement of four cells; Sarcinae

c) Cubical arrangement of eight cells; Sarcinae

d) Square arrangement of eight cells; Tetrads

27 / 50

27. Dead bodies of plants and animals are decomposed by:

a) Fungi

b) Bacteria

c) Viruses

d) A and B

28 / 50

28. Basal body of bacterial flagellum consists of:

a) Two pairs of discs

b) Three pairs of discs

c) Four pairs of discs

d) Six pairs of discs

29 / 50

29. The suitable term for gap between cell wall and cell membrane is known as:

a) Pericycle

b) Matrix

c) Periplasmic space

d) Intermembrane space

30 / 50

30. Blight disease in rice is caused by:

a) Xanthosomonas campestris

b) Xanthosomonas oryzae

c) Corynebacterium

d) Both A and B

31 / 50

31. Bacterial cyst formation is related to:

a) Thickening of cell wall

b) Contractions in cytoplasm

c) Both A and B

d) None of these

32 / 50

32. What is true about bacterial Capsule?

a) It gives sticky nature.

b) It is tightly associated with cell wall.

c) It can be removed from the cell.

d) A and B

33 / 50

33. Pili is made up of:

a) Pilin protein

b) Flagellin protein

c) Microtubules

d) Peptidoglycan

34 / 50

34. Pseudomonas solanocaerum causes:

a) Soft rot

b) Galls

c) Wilt disease in potato

d) None of these

35 / 50

35. Bacterial cell wall is composed of:

a) Polysaccharide

b) Cellulose

c) Chitin

d) Peptidoglycan

36 / 50

36. The hook of bacterial flagellum connects:

a) Cell membrane to cell wall

b) Basal body to the cell membrane

c) Basal body to the cell wall

d) Basal body to the filament

37 / 50

37. What is true option about spirochetes?

a) Flexible

b) Spiral-shaped

c) Thick

d) A and B

38 / 50

38. Biofilm bacteria can become very hard to kill, partly due to:

a) Presence of cell wall material

b) Presence of peptidoglycan material

c) Presence of chitinous material

d) Presence of glycocalyx material

39 / 50

39. The spore protects bacterial genome:

a) From chemical agents

b) From radiation

c) From intense heat

d) All of these

40 / 50

40. Bacterial pili are typically associated with:

a) Gram negative bacteria

b) Gram positive bacteria

c) Cyanobacteria

d) A and B

41 / 50

41. Bacterial glycocalyx may include:

a) Capsule

b) Slime layer

c) A and B

d) None of these

42 / 50

42. Which one of the following options is related to bacterial cell membrane?

a) It is involved in ATP formation.

b) It is bilayer in nature.

c) It is composed of peptidoglycan.

d) A and B

43 / 50

43. Which of the following can be removed from the bacterial cell easily?

a) Capsule

b) Biofilm

c) Peptidoglycan

d) Slime

44 / 50

44. _________ may prevent the phagocytosis of bacteria by macrophages.

a) Plasmid

b) Glycocalyx

c) Cell membrane

d) A and B

45 / 50

45. Bacterial fimbriae are tubular extensions of______ and project through_______.

a) Cell membrane; Capsule

b) Cell membrane; Cell wall

c) Cell wall; Capsule

d) Cell wall; Cell membrane

46 / 50

46. The bacterial filament is composed of :

a) Fibrous protein flagellin

b) Globular protein flagellin

c) Globular protein pilin

d) Fibrous protein pilin

47 / 50

47. Treponema pallidum belongs to which category of plants?

a) Spirillum

b) Spirochaete

c) Vibrio

d) Staphylococcus

48 / 50

48. A bacterium may become more pathogenic due to:

a) Cell membrane

b) Plasmid

c) Glycocalyx

d) A, B and C

49 / 50

49. Bacteria are being used as tools in genetic engineering experiments;__________ are used in such techniques.

a) Bacterial chromosome

b) Plasmids

c) Mesosome

d) Mesosome

50 / 50

50. The degradation of environmental pollutants by using living organisms is known as:

a) Biological control

b) Medication

c) Bioremediation

d) Biotic remedy

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