How many different kinds of monomers are there

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

Study this image which statement best describes the rock shown check all that apply

The first amino acid of a new polypeptide chain is