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10 Cards in this Set
- Front
- Back
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How big is the nucleus? |
10-20μm |
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What does the nuclear envelope do? |
It has pores that allow the passage of large molecules e.g. mRNA and ribosomes. |
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What is the granular material in the nucleus? |
The nucleoplasm, which contains chromatin ( made of DNA bound to protein) During cell division chromatin condenses into chromosomes. |
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What did the nucleolus do? |
They are the site for formation of rRNA for ribosomes. |
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How big are mitochondria? |
1-10μm in length |
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What is significant about the membrane of mitochondria? |
It has a double membrane. The inner membrane folds in to form cristae, which increase surface area. |
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What is the fluid in mitochondria? |
It is called matrix. It contains many compounds e.g. lipids and proteins. |
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What allows mitochondria to self replicate and produce proteins? |
Circular DNA and 70S ribosomes. |
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Why does being cylindrical benefit mitochondria? |
It increases SA: volume ratio, so diffusion is faster. |
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Picture chloroplast structure. |
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