Polysaccharides: Chitin

Polysaccharides: Chitin

Assessment

Interactive Video

Science, Chemistry

University

Hard

Created by

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The video explores chitin, a polymer of carbohydrates, comparing it to cellulose. It details chitin's structure, highlighting its repeating units of N-acetyl glucosamine and its unbranched, homopolymer nature. The video discusses chitin's presence in insect exoskeletons and its strong, resilient properties due to hydrogen bonding. It explains the beta 1-4 linkage pattern and why humans cannot digest chitin, unlike alpha-linked carbohydrates like starch. The video concludes with a discussion on the role of microorganisms in digesting beta-linked polymers in some animals.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary structural difference between cellulose and chitin?

Chitin has a beta 1 to 4 linkage, while cellulose has an alpha 1 to 4 linkage.

Chitin is made of N-acetyl glucosamine, while cellulose is made of glucose.

Chitin is a branched polymer, while cellulose is unbranched.

Chitin is found in plants, while cellulose is found in insects.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What makes chitin a strong polymer?

Its ability to dissolve in water

Its presence in plant cell walls

Its beta 1 to 4 linkage

Its branched structure

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where is chitin commonly found?

In the cell walls of plants

In the exoskeletons of insects

In the bones of mammals

In the shells of mollusks

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the linkage pattern in chitin?

Alpha 1 to 6

Alpha 1 to 4

Beta 1 to 4

Beta 1 to 6

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are beta linkages more stable than alpha linkages?

They allow for more hydrogen bonding

They are easier to digest

They are found in energy storage molecules

They are more flexible

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of linkage is found in energy storage molecules like glycogen?

Beta 1 to 4

Alpha 1 to 4

Beta 1 to 6

Alpha 1 to 6

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can't humans digest chitin?

Humans lack the enzyme to break beta linkages

Chitin is not present in the human diet

Chitin is insoluble in water

Chitin is too large to be digested

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