Biology Questions and Answers
own structures to obtain energy.
Elevation odenaturation of temperatuf enzymes and the organsre later reverts (^)
and tissues also preserved by other
specific techniques may the receptors. be grafted into
- Does pH affect the enzyme
activity?
The concentrationsolution affects the enzyme activity. of hydrogen ions in
Each enunder an optimum pzyme has maximal efH. ficiency
Since pH is one of the factors fdenaturation of proteins, if an enzyme isor the (^)
submitted to a pH level under which it is
denatured there will be no enzymaticactivity.
- Do enzymes act better
under acid or basic pH?
Most enzymes act in pH between 6 and
8, a range that correspgeneral acidic level of cells and blood.onds to the (^)
There are enzymes, however, that act
only under very acid oSo enzyme activity depends on pHr very basic pH.
interval.
In the stomach,juice has a very low pH, around 2, and for example, the gastric
there the enzyme pintensively digest proteins. Iepsin actsn the to (^)
duodenum, pancreatic secretions
increase ththe action oe pH of the enteric jf other digestive enzymes,uice for
for example, trypsin.
- Since pepsin is a gastric
enzyme does it have an acid
or basic optimum pH? What
happens to pepsin when it
passes into the duodenum?
Pepsin actsoptimum pH is aro within the stomachund 2, an acid p so itsH. (^)
When the enzyme passes into the
duodenum it meets a henzyme activity ends. igher pH and its
- What are enzyme
cofactors?
Some enzymes need other associatedmolecules to work. These molecules are (^)
called enzyme cofactorsbe, for example, organic io and they canns like
mineral salts, or organic molecules.
Inactive eto their conzymes which arfactors are callede not bound
apoenzymes. Active etheir cofactors are called hnzymes bound tooloenzymes.
- What is the relationship
between vitamins and enzyme
cofactors?
Many vitaminsthat cannot be synthesized are enzyme coby thefactors
organism athe diet. nd must be obtained from
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