Review

a double-layered membrane that surrounds the cell. Also called the plasma membrane, it
regulates what enters and leaves the cell.

Nucleus

a round body in the cell that contains DNA
and regulates gene expression.

Nuclear Membrane

a double-layered membrane that surrounds
the nucleus

Mitochondria

organelles that, using oxygen, convert
nutrients into energy that can be used
by the cell.

Chloroplast

an organelle that converts the radiant energy of the Sun into chemical energy through the
process of photosynthesis.

Cell Wall

the rigid, porous outer layer of a plant cell.