PRACTISE TEST 1 1. One electron is transferred from one atom to another. What do we call the resulted atoms?

the backbone of the dna and rna compound is sugar phosphate.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.