Are polymers that consist of atoms of carbon, hydrogen, and oxygen and are important for insulation and long term energy. Group of answer choices

proteins

solvents

Lipids

nucleic acids

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.