Biology A-Level AQA Revision Notes - Year 12 & 13
Biology
I achieved an A* in my Biology A-level this summer. These are all my notes. They aren't very organised but you can search for keywords so you can find relevant information with ease.
I do not hold responsibility for any incorrect facts in my notes if there are any!
Sample Data
| Text | What are the 3 key limiting factors of Photosynthesis?1. {{c1::Light Intensity}}2. {{c1::CO2 concentration}}3. {{c1::Temperature}} |
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| Front | Recall: Mutation Outcomes |
| Back | Beneficial:- Results in conformational change that improves the performance of the protein- Individual better suited for survivalNeutral:- Occurs in phenotypically insignificant DNA strands- No change in polypeptide sequence (degenerate code)- No damaging effect to protein functionHarmful:- Conformational change producing a non-functional protein |
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| Front | What happens in the Krebs Cycle? |
| Back | A series of oxidation-reduction reactions.Acetylcoenzyme A is combined with a 4-carbon compound (oxaloacetate) to produce a 6-carbon compound (citrate) in the mitochondrion matrix.At two points a molecule of CO2 is removed which allows the 4-carbon compound to be recycled.During these reactions, several electrons are removed from the reactants and transferred to the coenzymes producing reduced NAD and FAD.
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