NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Chitin cell walls are characteristic of which taxonomic group?
A
archaea
B
algae
C
fungi
D
bacteria
Explanation: 

Detailed explanation-1: -Chitin can be found in the majority of fungi, including those belonging to the Deuteromycetes, Basidiomycetes, Ascomycetes, and Chytridiomycetes. These fungi mostly contain alpha-chitin in their cell walls.

Detailed explanation-2: -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-3: -Chitin structure and diversity in fungi. Chitin is a (1, 4)-homopolymer of N-acetylglucosamine that folds in an anti-parallel manner forming intra-chain hydrogen bonds. Chitin chains are cross-linked covalently to (1, 3)-glucan (green) to form the inner skeleton of most fungi.

Detailed explanation-4: -Fungal cell walls, unlike those of plants, aren’t made of cellulose. Instead, they contain the carbohydrate polymer called chitin. A form of chitin is also a component of the external skeletons of insects and their relatives. Most hyphae are divided into cells by cross-walls called septa.

There is 1 question to complete.