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Enzymes Intro Quiz
quiz on characteristics of enzymes ppt
| Question | Answer |
|---|---|
| What is activation energy | This is the energy required to start a reaction and to break the chemical bonds of a (reactant) substrate |
| Enzymatic Reaction are affected by __________, ______________, _____________ and ______________. | Temperature, pH, substrate concentration and enzyme concentration |
| How do enzymes affect the activation energy and help seed up processes? | Enzymes lower the activation energy and therefore lower the activity rate |
| What is the optimal temperature for most enzymes in humans | 37 degrees Celsius |
| Define: enzyme | A globular protein that increases the rate of a biochemical reaction by lowering the activation energy threshold |
| Define: active site | This is the region of the enzyme, to where the substrate will bind to undergo a chemical reaction |
| How does the enzyme break the bond of the substrate | The bond between the active site and the substrate put pressure on the bonds in the substrate and end up breaking them |
| Explain the 1st 2 parts of the process of an enzymatic reaction, using sucrose as your substrate | - the substrate, sucrose is made from a bond between glucose and fructose which binds to the active site of the enzyme, creating an enzyme-substrate complex - the bond of the substr.. and the enzyme place pressure on the glucose-fructose, breaking it |
| Explain the last process in an enzymatic reaction | - the products are released and the enzyme is free to bond to another substrate |
| What is the name of the hypothesis that explains how enzymes are specific to their substrate? | The Lock and Key Hypothesis |
| The Lock and Key Hypothesis states that enzymes bond to substrates in 2 different ways. What are they? | Structurally and Chemically |
| How does the Lock and Key Hypothesis support bonding structurally? | It states that the 3D structure of the active site is specific to its substrate. Substrates that don't fit won't react. |
| How does the Lock and Key Hypothesis support bonding chemically | It states the substrates that are not chemically attracted to the active site won't react |
| Explain the relationship between temperature and enzyme activity | As the temperature increases, so will the rate of an enzymatic reaction. However, each enzyme has an optimal temperature where the rate is at it's maximum and after this temperature is surpassed, the enzyme becomes denatured and is no longer able to work |
| Explain the relationship between pH levels an enzyme activity | Every enzyme has a specific pH level range. Whenever that enzyme is somewhere outside of that range, this will always result in the denaturing of that enzyme. |
| Explain the relationship between substrate concentration and enzyme activity. | As the substr. conc. increases, so will the activity rate. But only up to a certain point, because after the substr. has reached a certain amount, the rate of reaction flatlines. This is because the enzymes are handling their maximum amount of substr. |
| Low temperatures result in ___________ _____________ ___________ for the activation of an enzyme catalyzed reaction to be achieved | insuffifient thermal energy |
Created by:
king-a
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