Term
State the functions of the following:
- ribosomes
- rough endoplasmic reticulum
- lysosome
- golgi appparatus
- mitochondrion
- nucleus
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Definition
- ribosomes: main site of protien synthesis.
- rough endoplasmic reticulum:pacakage of protiens synthesised in the ribosomes.
- lysosome:digests macromolecules and contain digestive enzymes.
- golgi apparatus:modifies, stores and routes products of the endoplasmic reticulum
- motochondria: serves as the site of cell reapiration.
- nucleus:contains a cells genetic material.
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Term
| state the difference between eukaryotic and prokarotic cells |
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Definition
Prokarotics
- does not have organelle
- they have plasmids
- small ribosomes
- no cell wall
- no centriole
Eukaryotic
- have organelle
- dont have plasmids
- larger ribosomes
- no cell wall
- has centriole
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Term
| four components of plant cells |
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Definition
plants cells:
- cell wall
- chloroplasts
- vacuole
- plasmodesmata
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Term
| Roles of exrtracellular components. |
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Definition
- The plant wall maintains shape, prevents excess water up takes, holds the whole plants up against the force of gravity.
- Animal cells secrete glycoprotiens that form the extracellular matrix. This functions in support, adhesion and movement.
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Term
| Composition and function of cell wall |
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Definition
| The main component is cellulose. The cellulose are arranged in bundles called microfibrils. This gaves the cell wall great tensile strength and allows high pressures to develope inside the cell. |
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Term
| Function of starch granules. |
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Definition
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