The energy used by cells comes from what? Molecules diffusing across the cell membrane.
The synthesis of water molecules.
Proteins produced in the ribosomes.
The breakdown of food in the presence or absence of oxygen.

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.