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How do pH temperature and substrate availability affect the rate of action of enzymes?
Wiki User
∙ 13y ago
All enzymes have optimal conditons, when it will work at its best. For example, if the temprature is too high the protein can become denatured. This is alos the case with Ph. Substrate level also affects enzyma activity because the more substartes there are, the more enxymes can bind to them.
Wiki User
∙ 13y ago
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The graph below shows how two different enzymes react with a substrate as the temperature increases. Based on the results what conclusion can be drawn about the action of the enzymes as?
Enzyme A reacts with less substrate than B. [APEX]
Is a substrate an enzyme?
NO. The enzyme acts on the substrate. The substrate is the chemical/compound being altered by the action of the enzyme. They are NOT the same.
How do chemical reactions occur at the relatively low temperature found within Cells?
They occur under the strict and highly specific action of Enzymes.
How does the lock and key model of enzymes action explain the highly specific way some enzymes select a substrate?
This refers to the hypothesis proposed by Emil Fischer in 1894 but confirmed until the 20th century. Fischer proposed that the specificity of an enzyme (the lock) for its substrate (the key) arises from their geometrically complementary shapes. More specifically, the noncovalent forces through which substrates and other molecules bind to the enzyme are identical in character to the forces that dictate the conformations of the proteins themselves. Both involve van der Waals, electrostatic, hydrogen bonding, and hydrophobic interactions.A substrate-binding site consists of an interaction or cleft on the surface of an enzyme molecule that is complementary in shape to the surface (geometrical complementarity). Molecules that differ in shape of functional group distribution from the substrate cannot productively bind to the enzyme; that is, they cannot form enzyme-substrate complexes that lead to the formation of products.
What is the temperature that promotes enzymatic action?
Different enzymes are most efficient at different temperatures, these are called 'the optimum temperature'. A temperature far lower than this will cause the rate of reaction to slow until barely noticable. A temperatuere far higher than this will cause the shape of the enzyme to change and the enzyme will become denatured.
The graph below shows how two different enzymes react with a substrate as the temperature increases. Based on the results what conclusion can be drawn about the action of the enzymes as?
Enzyme A reacts with less substrate than B. [APEX]
The graph below shows how two different enzymes react with a substrate as the temperature increases. Based on the results what conclusion can be drawn about the action of the enzymes as the temperatur?
enzyme B stays effective at higher temperatures than enzymes A
What are the 3 factors that can change the rate of enzyme reaction?
The first factor is Enzyme concentration or subtrate concentration.The rate of enzyme action is directly proportional to to the availability of enzyme provided the substrate concentration unlimited.Or the rate is directly proportional to the substrate concentration if enzymes are limited but if enzyme concentration is kept constant then upto the certain level the increase in substrate amount will no longer increase the rate of enzyme action. Second factor is temperature.The rate if an enzyme action is always directly proportional to the increase in temperature but upto the specific limit called as optimum temperature. Third factor is the pH value.Enzymes can work efficiently over a narrow range of pH called as Optimum pH.A minor change in pH value can denature the enzyme.
What are three factors that affect the action of an enzyme?
pH . Temperature . Substrate's Concentration
Why are enzymes so specific in their actions?
The enzymes are so specific to their action because they have substrate binding site which has three dimensional configuration which binds to the complementarity three dimensional substrate molecule and hence the enzymes are specific in binding the site and their action In case if the structural configuration of the enzyme changes the substrate is unable to bind at that site and the reaction does not take place
What happens to enzymes at -0 degrees?
At 0°C enzyme action is low because the movement of molecules is low. This causes the collision frequency between enzyme and substrate to be low. Increasing the temperature speed up the movement of molecules and thus the collision frequency increases therefore enzyme action increases. Human bio enzymes work best at 37 degrees Celsius. As the temperature raises the shape of the enzyme changes and the enzyme becomes denatured. Temperature above 50 degrees Celsius will denature most human enzymes.
What is the Mode of action of enzymes in terms of substrate complex?
These are the modes: 1. Lock and Key hypothesis 2. Induced Fit Hypothesis
Do Temperature of the cytoplasm influence the action of enzymes?
Yes, enzymes have optimal working temperatures that differ from enzyme to enzyme
Which hypothesis most likely explains the results at 60C and 70C in relative rate of enzyme action?
The substrate has changed shape because of the high temperature.
How does temperature change the action of enzymes?
The temperature is one of the key factors that can denature an enzyme. When the temperature is too low or two high, the enzyme will denature and not function.
Who does the substrate work on enzyme action?
The substrate is the molecule(s) that an enzyme works on
Is a substrate an enzyme?
NO. The enzyme acts on the substrate. The substrate is the chemical/compound being altered by the action of the enzyme. They are NOT the same.
