Biology revision

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what is magnification?
size of image / size of real object
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how many micrometres are there in a millimetre?
1000 micrometres
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What is the magnification of a light microscope?
X 2000
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what is the magnification of an electron microscope?
X 2,000,000
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What is the nucleus?
An organelle containing genetic information surrounded by the nuclear membrane
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what is the cytoplasm?
The water-based gel where most of the chemical reactions of life take place
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What is the cell membrane?
The membrane around the contents of a cell that controls what moves in and out of the cell
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What is the mitochondria?
The site of aerobic cellular respiration in a cell
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What are the ribosomes?
The site of protein synthesis in a cell
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What is the cell wall?
the rigid structure around plant and algal cells, that is made of cellulose and strengthens the cell
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What is the cellulose?
the complex carbohydrate that makes up plant and algal cell walls and gives them strength
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What are chloroplasts?
the organelles in which photosynthesis takes place
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What is chlorophyll?
the green pigment contained in chloroplast
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What is a permanent vacuole?
space in the cytoplasm filled with cell sap
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What are plasmids?
one or more extra small rings of DNA
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What are the two types of cells?
Eukaryotic (plant and animal); Prokaryotic (bacteria)
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What are the differences between eukaryotic and prokaryotic cells?
Prokaryotic cells are much smaller than eukaryotic cells. Eukaryotic cells contain membrane bound-organelles and a nucleus containing genetic material, while prokaryotes do not.
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What is the prokaryotic cell wall composed of?
Peptidoglycan
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Other cards in this set

Card 2

Front

how many micrometres are there in a millimetre?

Back

1000 micrometres

Card 3

Front

What is the magnification of a light microscope?

Back

Preview of the front of card 3

Card 4

Front

what is the magnification of an electron microscope?

Back

Preview of the front of card 4

Card 5

Front

What is the nucleus?

Back

Preview of the front of card 5
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