CELLS

CELLS

1. Animal cells

   • Nucleus - contains genetic material that controls the activities of the cell
   • Cytoplasm - gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions.
   • Cell membrane - holds the cell together and controls what goes in and out of the cell
   • Mitochondria - these are where most of the reactions for respiration take place. Respiration releases energy that the cells need to work.
   • Ribosomes - these are where proteins are made in the cell.

2. Plant cells

   • Plant cells normally contain all the bits Animal cells do plus a few extra.
   • Cell wall - made of cellulose. It supports the cell and strengthens it.
   • Permanent vacuole - contains cells sap, a week solution of sugar and salts.
   • Chloroplast - these are where photosynthesis occurs, which makes food for the plant. They contain s green substance called chlorophyll.

3. Yeast cell

   • Yeast is a microorganism.
   • A yeast cell has a nucleus, cytoplasm and a cell membrane surrounded by a cell wall.

4. Bacterial cells

   • Bacteria are single-celled microorganisms
   • A bacterial cell has a cytoplasm and a cell membrane surrounded by a cell wall.
   • The genetic material floats in the cytoplasm because bacterial cells dont have a nucleus.