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Wall Composition Questions

Question 1

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Answer 1

Walls consist of a fibrillar backbone set in a polysaccharide matrix.

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Question 2

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Answer 2

All true fungi have chitin fibres. The divisions of fungi differ in their presence of chitosan and the types of glucan fibrils, and the range of polysaccharides used in the matrix.

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Question 3

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Answer 3

During elongation, materials are still deposited in all of the walls. Essentially nothing specific happens to the wall except at the tip. Here, existing fibrils are disrupted, specific wall initials are deposited and the tip expands.

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Question 4

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Answer 4

The wall consists of thick layer which retards movement of water and solutes. Embedded in the wall are a variety of nonpolar compounds such as waxes and hydrophobins which specifically prevent movement of water, except through polar channels.

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Question 5

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Answer 5

Chemical messages are transmitted through the wall very rapidly. Processes such as anastomosis between compatible hyphae involve a complex signalling process which is carried out through existing walls. It is assumed that proteins in the wall detect and transfer these messages to the cytoplasm.

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Question 6

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Question 7

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