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Bacterial Capsules and their Functions

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Questions and Answers

What is the main function of pili in bacteria?

To mediate attachment to human cell surfaces (correct)
To form biofilms
To facilitate movement
To produce toxins

What is the composition of flagella in bacteria?

Lipids
Polysaccharides
Proteins called flagellins (correct)
Nucleic acids

What is the function of the glycocalyx in bacteria?

To facilitate movement
To produce toxins
To mediate attachment to human cell surfaces
To form a protective coating (correct)

What is the role of capsules in bacteria?

To limit the ability of phagocytes to engulf the bacteria (D) Signup and view all the answers

What is the function of the sex pilus in bacteria?

To form the attachment between the male and female bacteria during conjugation (A) Signup and view all the answers

What is the primary function of the glycocalyx in bacteria?

To facilitate firm adherence to various structures (A) Signup and view all the answers

What is the composition of biofilm?

Polysaccharide and protein in nature (D) Signup and view all the answers

What is the primary function of biofilm in bacteria?

To protect bacteria from antibiotics and host immune defenses (B) Signup and view all the answers

Which of the following structures is NOT associated with bacterial adherence?

Flagella (D) Signup and view all the answers

What is the primary function of capsules in bacteria?

To protect bacteria from antibiotics and host immune defenses (B) Signup and view all the answers

What is the main component of the bacterial cell wall responsible for its rigidity?

Peptidoglycan (A) Signup and view all the answers

What is the reason for the difference in Gram staining between Gram-positive and Gram-negative bacteria?

The ability of Gram-positive bacteria to retain the crystal violet–iodine complex (D) Signup and view all the answers

Which of the following is NOT a component of the bacterial cell wall?

Glycocalyx (A) Signup and view all the answers

What is the target of antibacterial drugs such as penicillins and cephalosporins?

Peptidoglycan synthesis (A) Signup and view all the answers

What is the term for the arrangement of bacteria in pairs, chains, or clusters?

Arrangement of cocci (B) Signup and view all the answers