02 02 Quiz 16 Q

What is one of the primary functions of the cell wall in prokaryotes?

• Assisting in cellular respiration

• Providing a site for protein synthesis

• Offering protection and maintaining the cell shape

• Aiding in DNA replication

Which substance primarily composes the bacterial cell wall?

• Lipopolysaccharide

• Phospholipid

• Peptidoglycan

• Chitin

How does the cell wall structure of gram-positive bacteria differ from that of gram-negative bacteria?

• Gram-positive bacteria have a thin layer of peptidoglycan, while gram-negative bacteria have a thick layer.

• Gram-positive bacteria have a thick layer of peptidoglycan, while gram-negative bacteria have a thin layer surrounded by an outer membrane.

• Both gram-positive and gram-negative bacteria have an identical cell wall structure.

• Gram-negative bacteria do not have a cell wall.

Which statement about the cell wall composition of archaea is correct?

• Archaea have cell walls made primarily of peptidoglycan.

• Archaea have cell walls made of pseudopeptidoglycan.

• Archaea do not have a cell wall.

• Archaea have cell walls made primarily of lipopolysaccharide.

Which statement accurately describes the function of the prokaryotic cell wall?

• The cell wall is primarily involved in energy production.

• The cell wall is responsible for the synthesis of nucleic acids.

• The cell wall provides protection against physical stress and environmental damage.

• The cell wall facilitates the transport of substances into the cell.

In bacteria, the cell wall plays a role in:

• Storing genetic material.

• Producing ATP.

• Cell division and anchoring the flagella.

• Synthesizing lipids.

Which component of the cell wall in gram-negative bacteria can act as endotoxins and trigger immune responses?

• Peptidoglycan

• Pseudopeptidoglycan

• Lipopolysaccharides

• Phospholipids

What are the repeating disaccharide units in the peptidoglycan layer of bacterial cell walls?

• Glucose and Fructose

• N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)

• Galactose and Mannose

• Ribose and Deoxyribose

Which component may be found in the cell wall of gram-positive bacteria and contributes to cell wall charge and structure?

• Lipopolysaccharides

• Teichoic acids

• Lipoteichoic acids

• Pseudopeptidoglycan

Where is the peptidoglycan layer located in gram-negative bacteria?

• Outside the outer membrane

• Directly beneath the outer membrane

• In the periplasmic space, between the inner cell membrane and an additional outer membrane

• Inside the inner cell membrane