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WHY ENZYME ARE USED FOR?
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1.-Speed up a chemical reaction 2.- Lower the "activation energy" to start a reaction. 3.-Each one have a specific substrate 4.- As reaction occur, enzymes is not consumed by the reaction. |
What is a substrate?
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Is a substance on which enzymes acts
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Are enzymes specific? YES OR NOif yes why it does mean?
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Yes, because for each enzyme there is a specific substrate, means that it will act only on a particular substrate.
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What are actives sites?
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Are regions of the enzymes that bind specifically to substrates.
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Does each ACTIVE SITE has its own shape? YES or NO
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Yes, because each substrate is determined by shape of an active site.
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The speed of enzyme-catalized reactions depend on what?
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Depends in the number of the of enzymes and substrates molecules. Means that the more enzymes and substrates the faster the metabolic reaction.
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What are metabolic pathways?
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Are sequences of enzyme-controlled reactions leading to a formation of a product.
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What happen if enzymes are not well regulated during the metabolic pathway?
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If enzymes are not well regulated in any process of the pathway there will no be able to obtain a "Final Product"
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Explain what "Rate-Limiting enzyme"refers to....
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It refers that enzymes can become saturated when there is a high substrate concentration at any level of the pathway. In other words if there is an over production of the substrate substance the enzyme can become ineffective.
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What mechanism feedback can control "a rate-limiting enzyme" Explain briefly how?
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Negative feedback may control a rate limiting enzyme in a metabolic pathway by inhibiting the "rate of the limiting enzyme" .
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What are Cofactors? and give examples.
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*Are non-protein component that make some enzymes active. *They can be either Ions (such as, copper, Iron or Zinc) or coenzymes (small organic molecules)
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What are Coenzymes? Examples
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Coenzymes are small organic molecules. Many coenzymes are composed of vitamins. Thiamine, Riboflavin, niacin, Vit B12.
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What are the factors that alter ENZYMES?
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Heat, Radiation,Electricity, Electricity, Changes in PH."Remember that most enzymes are proteins. Proteins can be denaturated in the presence of these factors. Denaturation means that the enzyme can be altered and become ineffective"
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What is Energy?
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Energy is the capacity to change something. It is the ability to do work. Energy can be changed from one form to another form.
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Name 6 forms of energy:
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1) Mechanical 5) Sound2) Chemical 6) Heat3) Electrical4) Light
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