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Biology - Enzymes
05/12/2022
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Enzymes: Lock & key theory. Enzymes active site compliment the substrate precisely A Specific substrate will fit a particular active site. (like a key fits a lock) This theory of enzyme-substrate interaction, explains now enzymes exhibit specificity for a particular substrate. Induced fit theory: Enzymes active site is not a completely rigid fit for the substrate. The active site will undergo conformational change when exposed to a substrate Has 2 advantages to the lock & key theory: L> Explains how enzymes may exhibit broad specificity. L>Explains how catalysts may occur. Enzyme + Substrate: An enzyme is a globular protein (acts as a biological catalyst) L₂ Speeds up the rate of a chemical reaction. Can be reused ↳ They aren't changed or consumed by reactions Enzyme reactions typically occur in aqueous solutions. Collision frequency- the rate of enzyme catalysis can be increased via the frequency of collisions L> By increasing the molecular motion of particles. ↳ Or by increasing the concentration of particles. Temperature PH to e Ca temperature (°C) Low temp = insufficient thermal energy Increase temp-increase Speed + motion. At optimum temp, rate of enzyme activity = peak Higher temps cause enzyme Stability to decrease = loss In shape & activity. rate of reaction PH Change pH= alter the Charge of the enzyme. By doing this, it will diminish its ability to bind to the substrate. They have an optimum pH moving outside this range, diminishes enzyme activity. Substrate Conc. rate of reaction Substrate conc. Increasing the concentration will increase the activity of...
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Alternative transcript:
the correspon- ding enzyme. More substrates mean there is an Increased chance of collision. The rate of activity will cease to rise after a certain point.