PLEASE ANSWER QUICK! 50 POINTS How does the structure of amino acids allow them to form a polypeptide?

Options:
A. Each amino acid has an amino group and a carboxyl group.
B. Each amino acid has a hydrogen atom and a carboxyl group.
C. Each amino acid has a carboxyl group and an R group.
D. Each amino acid has an R group and a hydrogen atom.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Calcium chloride +gold(1) oxide—>

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this