Chapter 7: Morphology of Bacteria — Online MCQ Test
MICROBIOLOGY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 7: Morphology of Bacteria with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers bacterial cell shapes arrangements and ultrastructure including cell walls plasma membranes flagella pili capsules and endospores. Students study Gram-positive....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 7: Morphology of Bacteria — Important Questions & Answers
What is the term used for bacteria that are spherical in shape?
- A. Bacilli
- B. Cocci
- C. Spirilla
- D. Vibrio
Answer: B. Cocci
Cocci are spherical or oval-shaped bacteria, while bacilli are rod-shaped.
Cocci are spherical or oval-shaped bacteria, while bacilli are rod-shaped.
Which of the following structures is responsible for bacterial motility?
- A. Capsule
- B. Pili
- C. Flagella
- D. Mesosome
Answer: C. Flagella
Flagella are whip-like appendages that provide locomotion to bacterial cells.
Flagella are whip-like appendages that provide locomotion to bacterial cells.
Which component is present in Gram-negative bacteria but absent or very thin in Gram-positive bacteria?
- A. Teichoic acid
- B. Peptidoglycan
- C. Outer membrane
- D. Plasma membrane
Answer: C. Outer membrane
Gram-negative bacteria possess an outer membrane containing lipopolysaccharides that is absent in Gram-positive bacteria.
Gram-negative bacteria possess an outer membrane containing lipopolysaccharides that is absent in Gram-positive bacteria.
Compare Gram-positive and Gram-negative cell walls: which statement is correct?
- A. Gram-negative have thicker peptidoglycan.
- B. Gram-positive have an outer membrane.
- C. Gram-positive contain teichoic acids.
- D. Gram-negative lack periplasmic space.
Answer: C. Gram-positive contain teichoic acids.
Teichoic acids are characteristic components of the cell wall of Gram-positive bacteria.
Teichoic acids are characteristic components of the cell wall of Gram-positive bacteria.
A bacterium with a single flagellum at one pole is classified as:
- A. Peritrichous
- B. Lophotrichous
- C. Monotrichous
- D. Amphitrichous
Answer: C. Monotrichous
Monotrichous bacteria have a single flagellum located at one end of the cell.
Monotrichous bacteria have a single flagellum located at one end of the cell.