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Fungi - Molds and Yeasts Questions and Answers

1.

Fungi can synthesize one of the following structural polysaccharide from the beta-glucose :

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: B

Fungi synthesise chitin.

Chitin is the structural polysaccharide of fungal cell walls. It is a beta-1,4 linked polymer of N-acetylglucosamine, a derivative of beta-glucose, built like cellulose but with an acetylamino group at C-2.

Cellulose, the beta-1,4 polymer of glucose itself, is the wall material of plants and of oomycetes, which are no longer classed as fungi. Amylopectin is a branched alpha-glucose storage polysaccharide of plants, and lignin is a phenolic polymer, not a polysaccharide.

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2.

Most fungi derive nutrition through :

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: C

Most fungi obtain nutrition by Digesting organic substrates.

Fungi are heterotrophs with absorptive nutrition. Their hyphae secrete enzymes into the material they grow on (dead matter, or a host's tissues), digest it outside the body and absorb the small molecules released. This is why they are such important decomposers.

Fungi have no chlorophyll and cannot photosynthesise, and their rigid chitin walls prevent them from engulfing bacteria or protozoa, which is how amoeboid protists feed.

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