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1)All living things are made of cells and the products of cells 2) All cells arise from pre-existing cells |
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Cell membrane Cytoplasm Ribosome DNA |
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Cells tend to be small because: |
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This maitains a higher surface area to volume ratio, and allows for more efficient diffusion in supplying of the cells needs eg. oxygen supply |
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Prokaryotic cells lack: Size: |
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Nucleus, membrane bound organelles. 1- 10 um |
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is circular, usually one large chromosome. Some also have smaller DNA rings calles plasmids. |
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Prokaryotic cells make up: |
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Bacteria and blue-green algae |
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1) Eukaryotic cells make up: 2) Size: |
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1)animals, plants, fungi, protists. 2) 10 - 100 um |
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What do plant cells contain that animal cells do not? |
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Large, central vacuole Cell wall Chloroplasts Carbohydrates stored in starch grains |
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What do animal cells contain that plant cells do not? |
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Centrioles Carbohydrates stored as glycogen granules |
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For aerobic respiration. Make ATP to supply energy for cell. |
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Controls what enters and leaves the cell |
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Contains DNA which directs the functions of the cell. |
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The site of protein synthesis |
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Rough Endoplasmic Reticulum |
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Internal transport, has ribosomes attached and modify the proteins produced. |
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Smooth Endoplasmic Reticulum |
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Internal Transport, produces fats and oils. |
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Package cell products for secretion. |
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The site of photosynthesis in plant cells |
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Provides support Plant cells: made of cellulose Fungi: made of chitin or chitosan Bacteria: made of peptidoglycan |
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Only in Plant cells. Stores water and nutrients. |
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Contain digestive enzymes which break down worn out cell components |
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Consists of microfilaments, intermediate filaments and microtubules. Supports the cells to maintain shape, enables cell movement, holds organelles in place and strengthens the cell. |
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