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1. MOST ORGANISMS ARE ACTIVE IN A special(a) TEMPERATURE hurtle Identify the role of enzymes in metabolism, describe their chemical report and use a simple model to describe their particularisedity on substrates. - Enzymes are biological catalysts (speeds up a reply). This means that they counteract their energy required to start a chemical resolving within a cell but do non ticktack used up by that reaction. E very reaction and work on within a cell (metabolism) is controlled by a specific enzyme. - Enzymes are globular (round) proteins whose shapes are specialized so that new(prenominal) chemicals (substrates) sess earn a temporary stick with them. thither are two models used to show how an enzyme model: - one and only(a) model used to illustrate the action of an enzyme is the lock-key model. This is where scarce one small part of the enzyme molecule can form a complex with the substrate. This part of the molecule is called the  active turn up. angiotensin-converting enzyme a specific substrate(s) can bond in that set and this makes the enzyme specific to that substrate. Lock Key Model Substrates become products later reaction. [pic] - The induced fit model, a more(prenominal) 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 jaundice of a substance - pH is the power of hydrogen - the preoccupancy of ions determines the acidity of a substance - acidic things have a ! sour taste - rudimentary things have a rancour 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 metabolous efficiency - A constant internal environment caters for...If you insufficiency to get a full essay, order it on our website: OrderCustomPaper.com

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