Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

7. Prokaryotic Cell Structures & Functions

Prokaryotic Flagellar Structure

Microbiology

7. Prokaryotic Cell Structures & Functions

Prokaryotic Flagellar Structure

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Multiple Choice

Which of the following statements is TRUE?

Gram-positive flagellar basal bodies have 4 protein rings.

Gram-negative flagellar basal bodies have 2 protein rings.

Gram-positive flagellar basal bodies have 2 protein rings.

Gram-positive & gram-negative flagellar basal bodies have 4 protein rings.

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Verified step by step guidance

Understand the structure of flagella in bacteria, which are responsible for motility. Flagella are composed of a filament, a hook, and a basal body.

Recognize the difference between Gram-positive and Gram-negative bacteria. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thin peptidoglycan layer and an outer membrane.

Identify the components of the flagellar basal body. In Gram-positive bacteria, the basal body typically consists of two rings: the MS ring and the C ring, which are embedded in the cytoplasmic membrane.

In Gram-negative bacteria, the basal body is more complex due to the presence of an outer membrane. It consists of four rings: the L ring (in the outer membrane), the P ring (in the peptidoglycan layer), the MS ring, and the C ring (both in the cytoplasmic membrane).

Evaluate the statements based on the structural differences: Gram-positive flagellar basal bodies have 2 protein rings, while Gram-negative flagellar basal bodies have 4 protein rings. This makes the statement about Gram-positive flagellar basal bodies having 2 protein rings true.