43-45 50-52 ch the following is of true of A) B) Enzyme alter the substrate c) E
ID: 166865 • Letter: 4
Question
43-45
50-52
ch the following is of true of A) B) Enzyme alter the substrate c) Enzyme function is of enzymes. D) is independent of structure E) temperature. physical and chemical environmental is 44. Enzymes increase the rate of chemical reaction factors such as p Zinc, an increase the rate of by lowering energy barriers. A) essential trace reaction by providing activation subs B) competitive element for most is present in the active site of the enzym inhibitor most organisms, a of the as (n) C) allosteric inhibitor of the enzyme. activator of the enzyme. D) cofactor necessary for enzyme activity. E) coenzyme derived from a vitamin. 45. How does a inhibitor decrease the rate of an enzyme reaction? A) by binding at the active of enzyme B) by binding to the enzyme, but not enzyme's active site C) by changing the free-energy change of the reaction D) by acting as a coenzyme for the reaction E) by decreasing the activation energy of the reactionExplanation / Answer
43.
Statement A is false as non protein co factors act as helping or inhibitor material to enzymes and does not alter their substrate specifity.
B is false as enzymes functionality can be increased or decreased after altering it's conformation or 3 dimensions.
C is false as enzymes function is dependent on physical and chemical parameters. For example lactase enzyme catalyse reaction on certain p temperature only .
Statement d is true that is enzymes increases rate of chemical reaction by lowering activation energy barriers.
Enzymes do not provide any activation energy to substrate. So statement E is false.
44
Zinc act as a cofactor necessary for enzyme activity for example carbonic anhydrase enzyme tightly binds zinc at active site to form carbonic acid from water and carbon dioxide which latter converted to bicarbonate ion after displacement of water.
45
Non competitive inhibitor binds to enzyme active site irrespective of enzyme binding to substrate.
50
Statement B best depicts the diagram of enzyme substrate reaction at their reaction stage, that is E+S -- ES + P as during reaction stage whole substrate is not converted to product and part of enzyme substrate complex will be present.
51
Hill is analogous to activation energy here.
52i
E is correct that is action of enzyme on substrate reduces it's strain, remove charge and lines up it at active site of action.
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