Biology, 21.05.2020 22:15 floresvanexel4pejp1p

What is the chemical composition and purpose of structure 3?
A It is made of chitin, and it acts to protect and support the cell.
B. It is made of DNA and proteins, and it acts to control cell activities
C. It is made of cellulose and other carbohydrates, and it acts to protect and support the cell.
D. It is made of a lipid bilayer and proteins, and it acts to allow passage of certain substances in and out of the cell.

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What is the chemical composition and purpose of structure 3?
A It is made of chitin, and it ac...

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