NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Fungi has a cell wall composed of what?
A
Peptidoglycan
B
Chitin
C
Cellulose
D
None of the above
Explanation: 

Detailed explanation-1: -Abstract. Chitin and chitosan are two related polysaccharides that provide important structural stability to fungal cell walls. Often embedded deeply within the cell wall structure, these molecules anchor other components at the cell surface.

Detailed explanation-2: -Chitin is an essential component of the cell walls and septa of all pathogenic fungi, and occurs in the cyst walls of pathogenic amoebae, the egg-shells and gut lining of parasitic nematodes and the exoskeletons of invertebrate vectors of human disease including mosquitoes, sand flies, ticks and snails.

Detailed explanation-3: -The cell wall is a characteristic structure of fungi and is composed mainly of glucans, chitin and glycoproteins. As the components of the fungal cell wall are not present in humans, this structure is an excellent target for antifungal therapy.

Detailed explanation-4: -Chitin, a biopolymer of N-acetylglucosamine with some glucosamine, is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans and insects, the radulas of mollusks and the beaks of cephalopods.

Detailed explanation-5: -Candida albicans cell wall is a two-layered structure. The main core of the cell wall is composed of a -glucan-chitin skeleton, which is responsible for the strength and shape of the cell wall (see Figure 1).

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