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Bio revision (cell Biology (1.2 cell ultra structure (1.3 membrane (1.4…
Bio revision
cell Biology
1.2 cell ultra structure
1.3 membrane
1.4 membrane transport :
passive transport
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pass through membrane, does not require energy (atp)
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structure components
prokaryotic (latin: before nucleus), does not contain nucleus
Eukaryote, nucleus contained within membrane
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Molecular biology
2.5 enzymes
-biological catalysts, speeds up reactions but not required for reaction
organic compounds
2.3 carbohydrates (molecules made up of carbon, hydrogen and oxygen )
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disaccharides
two molecules
Sucrose, lactose and maltose
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carbohydrates store and supply energy , also can serve as structural material
2.3 lipids
organic molecules composed of carbon, hydrogen, and oxygen atoms. The ratio of hydrogen atoms to oxygen atoms is much higher in lipids than in carbohydrates
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2.4 Proteins
Made up of amino acids , contains carbon, hydrogen, oxygen, and nitrogen atoms (some amino acids can contain sulfur)
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