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Bacteria Online Exam Quiz

Important questions about Bacteria. Bacteria MCQ questions with answers. Bacteria exam questions and answers for students and interviews.

1. The gram-positive bacteria lack __________ structure/component?

Options

A : outer membrane

B : murein

C : teichoic acid

D : plasma membrane

2. Gram-positive bacteria, responsible for food poisoning, is/are

Options

A : Mycoplasmas

B : Pseudomonas

C : Clostridia

D : all of these

3. Which of the following gram-positive bacteria causes pharyngitis (sore throat)?

Options

A : Neisseria

B : Streptococcus

C : Staphylococcus

D : Mycobacterium

1. Gram-negative bacterium is/are

Options

A : Escherichia

B : Clostridia

C : Staphylococci

D : All of these

2. The enzyme, which hydrolyses the murein is

Options

A : perxoidase

B : tannase

C : lysozyme

D : none of these

3. Thermus thermopiles is a

Options

A : gram negative eubacteria

B : gram positive eubacteria

C : gram negative archebacteria

D : gram positive archebacteria

4. Coliform bacteria on fermentation of carbohydrates yields

Options

A : lactic acid

B : acetic acid

C : formic acid

D : all of these

5. Which of the following is a gram-positive bacteria?

Options

A : Lactobacillus

B : Staphylococci

C : Streptococci

D : All of these

6. Gram-negative bacteria, responsible for food poisoning, is/are

Options

A : Salmonella

B : Pseudomonas

C : Clostridia

D : None of these

7. Which of the following is/are not a gram-positive bacteria?

Options

A : Streptococci

B : Pseudomonas

C : Mycobacteria

D : None of these

8. Bacterial spoilage is identified by which of the following morphological characteristics?

Options

A : Encapsulation

B : Endospores

C : Cell aggregation

D : All of these

9. Bacteria are

Options

A : saprophytic

B : symbiotic

C : hyper parasitic

D : all of these

10. Which of the following gram-negative bacteria is/are not aerobic?

Options

A : Pseudomonas

B : Neisseria

C : Escherichia

D : None of these

The endoflagella is present in which class of bacteria?

Options

A : a. Spirilla

B : b. Spirochetes

C : c. Bacillus

D : d. Coccus

Where is the endoflagella located in Spirochetes?

Options

A : a. In the cell membrane

B : b. In the cytoplasm

C : c. In the peptidoglycan layer

D : d. In the periplasmic space

Spirochetes like other bacteria swim best in media of low viscosity.

Options

A : a. True

B : b. False

C : c. May be

D : d. Can't say

Which of the following methods is used for viewing spirochetes?

Options

A : a. Bright-field microscopy

B : b. Phase-contrast microscopy

C : c. Dark-field microscopy

D : d. Electron microscopy

The family Leptospiraceae are aerobes.

Options

A : a. True

B : b. False

C : c. May be

D : d. Can't say

Which among the following are microaerophilic bacteria?

Options

A : a. Spirochaeta

B : b. Cristispira

C : c. Treponema

D : d. Borrelia

Which of the following bacteria causes syphilis in humans?

Options

A : a. Treponema dysenteriae

B : b. Treponema pallidum

C : c. Leptospira biflexa

D : d. Leptospira interrogans

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