B2 REVISION

nucleus: controls the activities of the cell

cytoplasm: controls the chemical reactions in the cell

ribosomes: protien synthesis happens there

mitochondria: most energy used in respiration is from here

cell membrane: controls the substances that go in and out the cell

cell wall: found in plant cells, strengthens the cell

vacuole: filled with cell sap, keeps it turgid

chloroplasts: contain chlorophyll used for photosynthesis

DIFFUSION: high concentration-low concentration

its when particles spread and it happens between dissolved substances.

e.g. smell of cooking travelling around a room.

OSMOSIS: