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Teichoic Acids in Gram-Positive Cell Walls

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Questions and Answers

What is the main function of teichoic acids in relation to ions?

To prevent the movement of all ions into the cell
To bind and regulate the movement of cations into and out of the cell (correct)
To regulate the movement of anions into the cell
To enhance the movement of potassium ions into the cell

What is the role of teichoic acids in cell growth?

To regulate cell division
To inhibit cell growth
To prevent cell death
To assume a role in cell growth (correct)

What is the main component of the Gram-negative cell wall?

Teichoic acid
Peptidoglycan (correct)
Lipoproteins
Outer membrane

Where is the peptidoglycan located in Gram-negative cell walls?

In the periplasm (D) Signup and view all the answers

What is the function of teichoic acids in relation to the cell wall?

To provide antigenic specificity (D) Signup and view all the answers

What is the main function of the periplasm in Gram-negative cell walls?

To house degradative enzymes and transport proteins (D) Signup and view all the answers

What is the primary function of the cell wall in bacterial cells?

To prevent bacterial cells from rupturing due to osmotic pressure (D) Signup and view all the answers

What is the chemical composition of the bacterial cell wall?

A macromolecular network called peptidoglycan (B) Signup and view all the answers

What is the disaccharide portion of peptidoglycan composed of?

N-acetylglucosamine and N-acetylmuramic acid (A) Signup and view all the answers

What is the function of peptidoglycan in the Gram-positive cell wall?

To create a thick and rigid structure (B) Signup and view all the answers

What is attached to the disaccharide portion of peptidoglycan?

Polypeptides (C) Signup and view all the answers

What is the primary function of the capsule in pathogenic bacteria?

To protect from phagocytosis (C) Signup and view all the answers

What is the role of peptidoglycan in the cell wall?

To maintain cell shape and structure (A) Signup and view all the answers

What is the composition of the glycocalyx?

Polysaccharide, polypeptide, or both (D) Signup and view all the answers

What is the term used to describe a glycocalyx that is firmly attached to the cell wall?

Capsule (B) Signup and view all the answers

What is the purpose of the hook and basal body in flagella?

To anchor the flagellum to the cell wall and plasma membrane (D) Signup and view all the answers

What is the term used to describe a glycocalyx that is unorganized and loosely attached to the cell wall?

Slime layer (B) Signup and view all the answers

How can the presence of a capsule be determined?

Using staining (B) Signup and view all the answers

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