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Q.

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?

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a

 Fungi- Chitinase

b

Plant cells - Cellulase

c

 Bacteria- Lysozyme

d

Algae - Methylase

answer is A.

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Detailed Solution

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Algal cell wall has two layers. The inner layer is always made up of cellulose. Depending on the type of algae, the composition of the outer layer is variable. In green algae, it has pectin; in brown algae, it has algin; and in
red algae, it has carrageenan or agar-agar. Methylase adds methyl groups (methylation) to restriction sites of
bacterial DNA to protect it from the action of restriction enzymes.

(2) Chitinase is the enzyme used to digest fungal cell wall, which is made up of N– acetyl glucosamine.

(3) Lysozyme is the enzyme used to digest bacterial cell wall, which is made up of peptidoglycan. It hydrolyses the glycosidic bonds between NAG and NAM.

(4) Cellulase is the enzyme used to digest cellulosic cell wall of plant cells. 

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