PLEASE ANSWER AND EXPLAIN WHY FOR EACH QUESTION PLEASE. Also is Flux control pre

Question

PLEASE ANSWER AND EXPLAIN WHY FOR EACH QUESTION PLEASE. Also is Flux control pretty much seeing an enzymes contribution to a series of reactions?

a. can have a C value that exceeds 1.0.

b. must exhibit allostery.

c. is rapid and reversible.

d. can be regulated by small increases in [S].

e. has been covalently modified.

2.An enzyme’s activity is low relative to other enzymes within the same path. This enzyme:

b. must exhibit a C value less than 0.5.

c. is cooperative.

d. is the only regulator of flux for the path.

e. likely catalyzes a reaction that is at equilibrium.

3.Reversible steps in metabolic paths:

a. are catalyzed by allosteric enzymes.

b. can have negative standard free energy changes.

c. must have negative actual free energy changes.

d. are catalyzed by inefficient enzymes that are low in concentration.

e. are in the minority whereas irreversible steps are more common.

Explanation / Answer

1. An enzymatic reaction with a negative delta G is characterized by the release of energy . These kind of reactions are also known as exergonic reaction. Here the substrate or the initial energy content is higher than the final energy. As this enzymatic reaction does not require any additional energy for the initiation of the reaction so these reactions are rapid and reversible.

2. The enzymes may show slow activity because they are cooperative in nature. In these enzymes the binding of substrate to one active site can modulate its affinity to another substrate binding to the other active site.

3. Reversible steps in a pathway has to be favorable energetically so should not require nergy from out side so must have a negative delta G.

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