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1. MOST ORGANISMS ARE ACTIVE IN A special(a) TEMPERATURE operate Identify the role of enzymes in metabolism, describe their chemical account and use a simple model to describe their ad hocity on substrates. - Enzymes are biological catalysts (speeds up a reply). This means that they weaken their energy required to start a chemical effect within a cell but do non direct used up by that reaction. E actually reaction and ferment within a cell (metabolism) is controlled by a specific enzyme. - Enzymes are globular (round) proteins whose shapes are specialized so that other chemicals (substrates) sess earn a temporary stick with them. on that point are two models used to show how an enzyme model: - matchless model used to illustrate the action of an enzyme is the lock-key model. This is where scarce atomic number 53 small part of the enzyme molecule can form a complex with the substrate. This part of the molecule is called the active turn up. unity a specific substrate(s) can bond in that post and this makes the enzyme specific to that substrate. Lock Key Model Substrates become products later reaction. [pic] - The induced fit model, a more than recent adaption on the lock-key model, proposes that the active site slightly changes its shape to concord the substrate perfectly.

[pic] Identify the PH as a focusing of describing the sourness of a substance - pH is the power of hydrogen - the ducking of ions determines the acidity of a substance - acidic things have a sour taste - rudimentary things h! ave a acerbity taste - acidic/basic things can be very corrosive (it can burn) - A pH of 0-6 indicates an acid solution, where 0 is more acidic than 6 - Neutral = pH of 7 - A pH of 8-14 indicates a basic solution, where 14 is more basic than 8 Explain why the maintenance of a unvaried internal environment is important for optimal metabolic efficiency - A constant internal environment caters for...If you lack to get a full essay, order it on our website: OrderCustomPaper.com

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