Question

20. Which macromolecule is structure A composed of and what is its function?

A.) Carbohydrates - makes quick energy

B.) Lipid - makos fats

C.) Nucleic acid - makes genetic material

D.) Protein- facilitates diffusion

Answer 1

The awnser is D... I hope this helps

Answer 2

The structure A is a PROTEIN, it is composed of amino acids and its function is to facilitate diffusion (option D).

• Channels and/or carriers are specific membrane proteins that enable the movement of molecules across biological membranes.

• In facilitated diffusion, specific carriers enable the passage of molecules across biological membranes in favor of a concentration gradient, ie., from a region of high concentration to a region of low concentration.

• For example, aquaporins are membrane proteins (carriers) used by cells to allow the passage of water molecules across biological membranes.

In conclusion, structure A is a PROTEIN, it is composed of amino acids and its function is to facilitate diffusion (option D).

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