Chlorophyll is a green pigment found in plants, algae, and some types of bacteria.

A chloroplast is a specialized organelle found in plant cells and some algae.

Enzymes are macromolecular biological catalysts that accelerate chemical reactions.

Homeostasis is the ability of living organisms to maintain a stable internal environment despite changes in their external surroundings.

Membrane proteins are common proteins that are part of, or interact with, biological membranes.