Chitin,a Modified Form of Cellulose,is Not Only Cross-Linked with Proteins

question 41

Multiple Choice

Chitin,a modified form of cellulose,is not only cross-linked with proteins but also its glucose units are modified with atoms of

• A)nitrogen.
• B)hydrogen.
• C)oxygen.
• D)sulfur.
• E)phosphorous.

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Definitions:

Ciliary Ring

A structure in the eye made up of muscles that control the shape of the lens for focusing light on the retina.

Vitreous Humor

The clear gel that fills the space between the lens and the retina of the eyeball, helping maintain its shape and allowing light to pass through.

Fibrous Tunic

Outer layer of the eye; composed of the sclera and the cornea.

Transparent

Allowing light to pass through so that objects behind can be distinctly seen; clear; see-through.