6) Reactions far from equilibrium are highly regulated in metabolic pathways bec

ID: 310475 • Letter: 6

Question

Reactions far from equilibrium are highly regulated in metabolic pathways because:

The net flux through these steps is easily reversed

These reactions are highly exergonic

The rate differences between the forward and reverse steps are often small

These reactions occur most frequently in the cell

Enzymes that catalyze reactions far from equilibrium are more easily phosphorylated

Enzymes that contain both a catalytic and regulatory subunit are often advantageous to the control of metabolic pathways. Why?

More than one of the choices listed

Multi subunit enzymes are resistant to allosteric control

Alternative substrates can be employed depending on the regulatory subunit present

There are more ways to regulate enzymatic activity

These enzymes have a greater effect on deltaG for the reactions they catalyze

Which statement is true for anaerobic fermentation?

ATP is generated by consuming oxygen

Pyruvate is oxidized to Lactate

NAD+ is regenerated

More than one of these choices

None of the choices listed

The net flux through these steps is easily reversed

These reactions are highly exergonic

The rate differences between the forward and reverse steps are often small

These reactions occur most frequently in the cell

Enzymes that catalyze reactions far from equilibrium are more easily phosphorylated

7:- Answer---option d

Exp:- enzymes with allosteric sites in addition to catalytic site can regulated by many ways as compared simple catalytic site enzymes.

8:- option C

During anaerobic fermentation the NAD+ are regenerated.

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