Question

In: Biology

The carbohydrates of mammalian tissues include     , while the carbohydrates of bacteria include     . a. galactosamine…....

The carbohydrates of mammalian tissues include     , while the carbohydrates of bacteria include     .

a.

galactosamine…. glucosamine

b.

lactose… sucrose

c.

hemiacetals… hemiketals

d.

proteoglycans… peptidoglycans

e.

NAG… NAM

Solutions

Expert Solution

The right option is (d) proteoglycan.... peptidoglycan

Explanation:

Galactosamine: It is a sugar-protein compound derivative of galactose sugar. It is found in the metabolite of humans, and some bacteria and fungal cell walls contain galactosamine. [ so it is the wrong option]

Glucosamine is a sugar-protein that naturally found in bones, bone marrow, shellfish, and fungus. [not in bacteria so wrong option]

lactose: It is a sugar found in milk.

Sucrose: This is table sugar (a disaccharide of glucose and fructose). [not produced in bacteria]

Hemiacetals and hemiketals: A hemiacetal or a hemiketal is a compound that forms after the addition of an alcohol to aldehyde or ketone, respectively. [wrong option]

Proteoglycans and peptidoglycans: proteoglycans are sugar amino protein that found on the cell membrane of mammalian, and peptidoglycans are a sugar-peptide carbohydrate that consists cell wall of bacteria. [ So it is the right option]

NAG and NAM: NAG (N-acetyl glucosamine) and NAM (N-acetyl muramic acid) are components of peptidoglycans. [so it is the wrong option]


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