The main goal is to move substance across the cell membrane. There is one main difference between facilitated diffusion and active transport. ... With active transport, the protein changes shape by using ATP. Energy is needed in this form of transport because the substances are going against the concentration gradient.
Mountain building and defrostation
Answer:
Explanation:
A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O). ... Polypeptides and proteins are chains of amino acids held together by peptide bonds, as is the backbone of PNA.
Far end is the answer i presume
