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Bacterial Cell Wall Composition

Created by

@ComplimentaryCyclops

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Questions and Answers

Which conjugated molecule in murein provides important ligands for adherence and receptor sites for viruses or antibiotics?

Lipoglycan

N-Acetylglucosamine

Peptidoglycan (correct)

Pentaglycine

What is the main function of murein in the bacterial cell wall?

Generate energy for the cell

Provide cell shape and protect the cell (correct)

Facilitate communication between cells

Regulate cell division

Why do Gram-positive bacteria retain crystal violet stain during the staining process?

Lack of peptidoglycan in their structure

Due to high content of peptidoglycan in their structure (correct)

Due to outer lipopolysaccharide content

Presence of lipoglycan in their cell walls

What happens to Gram-negative bacteria during the staining process involving alcohol treatment?

They fail to retain stain and are washed out Signup and view all the answers

Which component is responsible for the cross-linking in the structure of peptidoglycan?

Pentaglycine Signup and view all the answers

What is the characteristic feature that distinguishes Gram-positive bacteria from Gram-negative bacteria?

High content of peptidoglycan in cell wall structure Signup and view all the answers

Describe the main features of molluscs' body organization.

Triploblastic, bilaterally symmetrical, coelomates, and protostomes with organ system grade of body organization. Signup and view all the answers

What are the three main parts of a mollusc's body and their functions?

Muscular foot (movement), visceral mass (internal organs), and mantle (secretes shell). Signup and view all the answers

How do many molluscs feed, and what organ do they use for this purpose?

Many molluscs feed using a radula, a strap-like rasping organ, to scrape food. Signup and view all the answers

Explain the reproduction strategies observed in molluscs.

Reproduction in molluscs is always sexual. Some species have separate sexes, while others are hermaphrodites. They all pass through a trochophore larvae stage. Signup and view all the answers

Which molluscs have reduced or completely lost their shells during evolution?

Slugs, squids, and octopus have reduced or lost their shells during evolution. Signup and view all the answers