B1: cell-level systems
- Created by: Tayyba.123
- Created on: 07-12-17 20:36
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- B1: cell-level systems
- what happens in cells?
- DNA
- a double-helix structure
- made of nucleotides
- contains codes for all characterisitics in an organism.
- there are pairs of genes; AT , CG.
- enzymes
- large protein molecules
- CATALYSTS-speed up reactions.
- each enzyme specific to one reaction.
- factors affecting rate of reaction: temperature, PH, substrate concentration, enzyme concentration.
- if too hot or PH incorrect the enzyme becomes denatured.
- digestion
- carbohydrates use CARBOHYDRASE for sugars
- proteins use protease for amino acids
- lipids use lipase for fatty acids and glycerol
- DNA
- respiration...
- aerobic respiration...
- Untitled
- aerobic respiration...
- what happens in cells?
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