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Why enzymes activity slows down and eventually stops above 35 degree C and below 0 degree C explain why?
Wiki User
∙ 10y ago
the normal working speed of human enzymes is 37 degrees c.If enzymatic activity below the 37 degrees c it works slow and if enzymatic activity is above the 37 degrees c its works very high.
Wiki User
∙ 10y ago
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What happens to proteins in the human body when they are heated up above 40 degree celsius why is this dangerous?
They become denatured; enzymes lose activity and cannot catalyze reactions effectively.
Tess has second- and third-degree burns on her arms and face Explain why the burns that Tess suffered make her very susceptible to infection?
Because 2nd degree burns and 3 degree burns can get infected
Why is it important that cells maintain homeostasis in order for enzymes to work properly?
Homeostasis is important for our system to be functional!, for example our body maintains 37 degree Celsius inside. So cellular enzymes require the same temperature to carry out biological reactions, if it drops to 30 degrees and we don't have homeostasis to bring back 37 degrees, then most of the enzymes that need 37 degrees would be poorly active.
How does pH affect an enzyme?
When the pH level rises, the enzyme's bonds become weakened, changing the enzyme's structure and disabling its function (so its substrates can't enter its active site). Enzymes, like all proteins, are folded into three-dimensional shapes (called tertiary structure). Their structures are determined by their amino acid sequences and the conditions of the solution they're in. The acidity of a solution can affect the tertiary structure of the protein, making it more or less accessible to the substrates or ligands(molecules that affect enzyme activity but are not processed by the enzyme). In most cells, enzymes acting in the cytosol and mitochondria have pH optima of around 7.2 (physiological pH). However, some enzymes in these compartments actually work better at lower pH, which occurs when the cells are stressed. The vacuole and apoplastic space (between plasma membrane and cell wall) of plant cells is much more acidic, therefore enzymes acting there have pH optima between 3-5. In the human digestive tract, there are enzymes operating at basic pH (mouth and intestine) and highly acidic pH (stomach). So the effect of pH depends on the "native" conditions that the enzyme is optimized to use.
What is effect of temperature on an enzyme?
Many of the enzymes in our bodies work best at body temperature. At significantly lower temperatures the substrate molecules do not have enough kinetic energy for the reaction to take place even in the presence of the enzyme. At body temperatures significantly higher than normal, the enzyme will not work well because the kinetic energy from the molecules in the solution containing the enzyme is so high, that the enzyme's shape is pulled apart to the point that the enzyme is not able to properly function.Indeed the enzyme's structure may be so disrupted or denatured that the enzyme molecule cannot return to its original shape. Indeed the danger of high fevers stems in large part from the potential damage to enzymes and other proteins from the high temperature. The optimum performance of most human enzymes is at about 37o celcius, or the temperature of the human body. Exposing enzymes to elevated temperatures can cause them to denature, which basically means they will no longer be functional. Enzymes are more active at a specific temperature. At higher temperatures they get denatured, so their structure breaks down. Same effect as pH. At lower temperatures they become inactive, in this case when they reach their optimum temperatures, they will become active again.temperature directly affects the rate of enzyme activity.On every 10 degree Centigrade rise in temperature,rate of enzyme activity doubles.but temperature affects up to its optimum range.For example:optimum temperature range of human is 37 degree centigrade.beyond this level of temperature,it can destroy the enzyme's structure and enzyme can be denatured due to fast vibration among its molecules which can lead to the bonds to break
What effect does cooking have on enzyme activity?
You mean heating the enzymes? heating to a certain degree increases their rate of catalytic activity, until about 30-40 degrees Celsius. However if you continue heating, the enzyme's basic structure will be deformed (it changes shape), and since structure is essential to function, the enzymes activity will be reduced. that happens around 60-70 degrees Celsius, but it is different in various organisms.
What happens to proteins in the human body when they are heated up above 40 degree celsius why is this dangerous?
They become denatured; enzymes lose activity and cannot catalyze reactions effectively.
What is the optimum temperature of enzymes of thermophilic bacteria?
55 to 65 degree Celsius
Can cell repiration occur in organism at a temp above 65 deg centigrade - give reason?
The rate of any reaction depends on the active masses of the reactants, the pH and the temperature. This applies to the biological reactions involving enzymes like cellular respiration The enzymes in general get more and more active as the temperature increases. This would be true till the temperature reaches up to 45 degree Celsius (in general for humans). Above which some enzymes denature and their activity completely drops off. This temperature is variable and is dependent on the enzyme. (A few enzymes are active even at high temperatures). But at 65 degree Celsius most of the intracellular enzymes are denatured. So as the temperature increases, the cellular respiration increases up to a certain point and then there is a sharp decline so at or after 65 degree Celsius cellular respiration is virtually impossible.
At 100 degrees the amylase does not function at all what happends to the enzyme?
Enzymes are proteins and temperature have profound effect on their activity. At 100 degree Celsius enzyme amylase denatures meaning its structure changes irreversibly. At that point it renders useless and cannot breakdown starch.
How to Write my name with business degree?
What? Please explain.
How do you explain one who has one Ba degree and master degree but two degree are from different stream?
There is no reason for that to need any explanation!
What are some factors that may influence enzyme activity?
Factors affecting enzyme activity1: Enzyme concentrationIf the quantity of enzyme is doubled, the enzymatic activity will also be doubled because more enzymes are now available to work. After a certain level of enzyme concentration, there will be no more increase in the enzymatic activity because all the substrate molecules are combined with an enzyme and the rate of reaction will stabilize.2: Substrate concentrationBy increasing substrate concentration, enzymatic activity increases. Increasing the substrate further without increasing the enzyme concentration will not affect the enzymatic activity because all the enzymes are occupied by a substrate molecule.3: pH valueSome enzymes require acidic surroundings, most require a more neutral condition for their activity. Change in the pH can change the enzyme's structure and enzyme become useless.4: TemperatureAn increase in temperature of 10 degree celsius doubles the enzymatic activity. Each enzyme has its own optimum temperature at which its enzymatic activity is maximum. Very high temperatures break the bonds that maintain shape of enzyme. If the enzyme denatures, the substrate can not fit in to the active sites and enzyme become useless.
What kind of activity could you do in 15 degree Fahrenheit weather?
Ice-fish
Degree of flexibility older adults have is affected by?
present lever of physical activity
How are depressants classified?
is depreesants classified according to the degree they decrease cns activity
Enzymes are usually inactivated at what temperature?
The optimal range for the enzymatic activity goes from 25oC to 32oC.
