Question

A bacterial cell wall is composed of: A) A polysaccharide consisting of a single type of monosaccharide unit and cross-linking oligopeptides. B) A polysaccharide consisting of 2 types of monosaccharide units and cross-linking oligopeptides. C) A polysaccharide consisting of 3 types of monosaccharide units and cross-linking oligopeptides. D) Two different polysaccharides and 1 type of oligopeptide, which are cross-linked.

Answer 1

The bacterial cell wall is made of peptidoglycan, which consists of chains of two alternating types of monosaccharides (NAG and NAM) cross-linked by oligopeptides, making option B the correct answer.

Step-by-step explanation:

A bacterial cell wall is composed of a type of polymer called peptidoglycan, which includes polysaccharide chains that are cross-linked by short chains of amino acids. The structural integrity of a bacterial cell wall is attributed to N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM), two types of monosaccharides that alternate in the polysaccharide chains. These chains are attached to oligopeptides that cross-link for additional strength. Therefore, the correct answer to the question is B) A polysaccharide consisting of 2 types of monosaccharide units and cross-linking oligopeptides.

Answer 2

B) A polysaccharide consisting of 2 types of monosaccharide units and cross-linking oligopeptides.

Step-by-step explanation:

A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.

Also, a unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

A bacterial cell is made up of peptidoglycan and its main function is to maintain the shape of a cell while preventing it from bursting due to osmotic pressure. Also, the bacterial cell inhibits the passage of larger molecules but allows the free movement (passage) of smaller molecules in the body of a living organism.

Basically, bacterial cell wall comprises a polysaccharide that's typically made up of two (2) types of monosaccharide units and cross-linking oligopeptides.