Consider the following substances : I) Pectin II) Lignin III)Cutin ` IV) Chitin Which of these substances occur in plant cell wall?

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Q: 107 (CDS-I/2003)
Consider the following substances : I) Pectin II) Lignin III)Cutin ' IV) Chitin
Which of these substances occur in plant cell wall?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,9,16,9,13,1,2

keywords: 

{'plant cell wall': [0, 0, 1, 0], 'pectin ii': [0, 0, 1, 0], 'chitin': [4, 0, 1, 0], 'substances': [0, 0, 1, 1], 'iv': [6, 110, 77, 8]}

The correct answer is option 1: I, II, and III.

Pectin is a complex carbohydrate that is found in the plant cell wall. It acts as a glue-like substance, helping to hold plant cells together.

Lignin is another component of the plant cell wall. It is a complex polymer that provides rigidity and strength to the cell wall.

Cutin is a waxy substance that is present on the outer layer of plant cells. It acts as a protective barrier, preventing water loss and protecting the cell from pathogens.

Chitin, on the other hand, is not found in the plant cell wall. It is a tough, fibrous substance that is primarily found in the exoskeleton of animals such as insects and crustaceans. Therefore, option 2 (I, II, III, and IV) is incorrect.

To summarize, pectin, lignin, and cutin are substances that occur in the plant cell wall, while chitin does not.