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Cell Biology: Cytoplasmic Membrane

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Questions and Answers

Which of the following is a consequence of cell wall damage in bacteria?

Enhanced biofilm formation

Loss of cell shape and structure (correct)

Increased antibiotic resistance

Increased DNA replication

What is the function of lipopolysaccharides in Gram-negative bacteria?

To maintain cell shape and structure

To regulate gene expression

To synthesize peptidoglycan

To play a role in the innate immune response (correct)

What is the characteristic of acid-fast cell walls?

High lipid content (correct)

High peptidoglycan content

High water content

High protein content

What is the function of the periplasm in Gram-negative bacteria?

<p>To break down toxic compounds</p> Signup and view all the answers

What is the purpose of Gram staining in microbiology?

<p>To distinguish between Gram-positive and Gram-negative bacteria</p> Signup and view all the answers

Study Notes

The Cytoplasmic Membrane

The cytoplasmic membrane is 7 nm thick and composed of phospholipid and protein molecules.
It has a distinctive structure with 2 dark bands separated by a light band.
Prokaryotic membranes, excluding mycoplasmas, lack sterols.

Functions of the Cytoplasmic Membrane

Acts as an osmotic or permeability barrier, allowing for passive and facilitated diffusion.
Performs other functions, but these are not specified.

Cell Structure of the Domain Bacteria

Consists of two main components:
- The cytoplasmic membrane
- The bacterial cell wall

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Description

Learn about the composition and characteristics of the cytoplasmic membrane in cells, including its thickness, molecular structure, and differences in prokaryotic membranes.