Term
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Definition
| structure in a cell division from which spindel fibres develop |
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Term
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Definition
s t r a n d s
of cytoplasm linking cells t-o-g-e-t-h-e-r |
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Term
| What are the 4 organelles that are in plant cells only? |
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Definition
- Cell wall
- Chloroplasts
- Large perminant Vacule
- Plasmodesmata
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Term
| What are the two organelles present in an animal cell only? |
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Definition
- Small temporary vacule
- Centrioles
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Term
| What is the 2 purpose's and 2 structure's of a cellulose cell wall? |
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Definition
Consists of cellulose microfibrils embedded in a polysaccharide matrix.
functions:
- provide strenght and support
- permit movement of water from cell to cell
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Term
| What are the 3 structures and 1 function of a Vacule? |
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Definition
fluid filled sac bound by a single membrane (the tonoplast)
contain cell sap, a storage site for chemicals (e.g. glucose)
Provides an osmotic system which functions in support of young tissues. |
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Term
What is a chloroplast made up of? (5 things)
IDGSS |
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Definition
- Inter-granal thylakoid
- Double membrane
- Granum
- Stroma
- Starch grain
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Term
| What is the function of a chloroplast? |
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Definition
Photosynthesis.
The arrangement of a chloroplast creates a large surface area for trapping light energy. |
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Term
| Where is the centriole located? |
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Definition
| Just outside the nucleus in a distinct region of the cytoplasm known as the centrosome. |
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Term
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Definition
small vacules formed when portions of the Golgi body are pinched off.
They contain and isolate digestive enzymes from the remainder of the cell. |
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Term
| What happens to the lysosomes? (2) |
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Definition
They can release the enzymes to destroy worn out organelles.
They discharge their contents in the membrane lined vacuole where digestion is carried out |
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Term
| What is phagocytosis? (lysosome related) |
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Definition
When a lysosome digests material that has been taken into the cell.
E.g. white blood cells engulf bacteria by phagocytosis and the lysosomes discharge their contents into the vesicle so formed and digest the bacterium. |
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