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Phosphorylated enzymes may be more or less active than non-phosphorylated enzymes
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∙ 12y ago
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What is varied when tested the effect of pH enzyme activity?
The pH is varied to effect, by its affect, this test.
How does initial concentration of substrate effect enzyme activity?
At low concentration of substrate , rate of enzyme action is directly proportional to conc. of substrate .
What is the effect of pH upon the relative enzyme activity?
Different enzymes work best at different pH. This is refered to as the ideal pH for the enzyme. For example, the digestive enzyme trypsin works best at an acidic pH while alkaline phosphatase works best at a basic pH. Therefore, enzyme activity varies with pH and this variation depends on the enzyme being studied
What switchs on enzyme activity while what can switch off or reduce enzyme activity?
activators; inhibitors
What is a function of enzyme protein for example hexokinase?
Hexokinase is an enzyme involved in the phosphorylation of hexose (five carbon sugar). It speeds the process on adding a phosphorus to the sugar.
Can hormones alter the enzyme activity in cells?
Yes. Hormones may stimulate the reversible covalent modification of an enzyme via phosphorylation or dephosphorylation and alter the activity of the molecule.
What is the effect of hydrochloric acid on the enzyme activity?
Denature enzyme activity
What is the effect of cold temperatures on enzyme activity?
Cold temperatures have a drastic effect on an enzyme's activity level. Cold temperatures usually dramatically slow down an enzyme's activity.
How does inorganic phosphate inhibit enzyme activity?
Inorganic phosphate can be used as an inhibitor under covalent modification. Phosphorylation/ Dephosphorylation can either activate or deactive an enzyme.
Phosphorylation of glycogen phosphorylase has what effect on the enzyme?
Activation, conversion from glycogen phosphorylase B to glycogen phosphorylase A
What is varied when testing the effect of pH on enzyme activity?
pH
What enzyme catalyze the phosphorylation of glucose after a meal?
glucokinase
Which enzyme is responsible for the phosphorylation of creatine?
Creatine KINASE
What is hexokinase?
a hexokinase is an enzyme that catalyzes the phosphorylation of hexoses.
What is varied when tested the effect of pH enzyme activity?
The pH is varied to effect, by its affect, this test.
What two internal body conditions effect enzyme activity?
temperature and pH
How does initial concentration of substrate effect enzyme activity?
At low concentration of substrate , rate of enzyme action is directly proportional to conc. of substrate .
