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Cells The function of the different parts of animal cells The difference between plant and animal cells Animal cells Nucleus – contains DNA and controls all the activities of the cell. It also contains instructions for making new cells or organisms Cytoplasm – a liquid gel in which most of the chemical reactions needed for life take place. Ribosomes – where protein synthesis takes place Animal cells Cellmembrane – controls the passage of substances in and out of the cell Mitochondria – structures found in the cytoplasm where most of the energy is released during respiration. Plant cells Chloroplast Cytoplasm Ribosomes Permanent vacuole Cell membrane Cellulose cell wall Nucleus Plant cells All plants cells have: Cell wall made of cellulose which strengthens the cell and gives it support Many (but not all) plant cells also have: Chloroplasts are found in the green part of the plants. They contain a green substance called chlorophyll which is needed to absorb light to make food by photosynthesis Permanent vacuole which is important for keeping the cells rigid to support the plant Enzymes An enzyme is a biological catalyst. It helps speed up chemical reactions with out being changed or used up itself.
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