chapter 6

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Two general factors that determine the fate of a chemical reaction in living cells

direction and rate

amount of available energy that can be used to promote change or do work is called

free energy

in the biochemical regulaion of metabolic pathways, how would one overcome the effects of a competitve inhiitor on enzyme activity

increase the amount of substrate for the enzyme

(TRUE/FALSE) noncompetitive inhivition within a metabolic pathway prevents excess accumulation of the pathways product. this occurs when the product binds the active site of an enzyme recucing its activity and the subsequent accumulation of product

False

(TRUE/FALSE) atabollic and anabolic reactions in living cells involve the transfer of electrons from one molecule to another in reduction-oxydation reactions.

True

RNA exposed to ________ will release ________ which the cell can recycle.

exonuclease, neucleotides

Protien exposed to a ____________ will release __________ which the cell can recycle

Proteasome, amino acids

concider the biochemical pathway: A-E1->B-E2->C Enzyme 1 can utilize...

only A as a substrate

what function do many B vitamins serve in the production of energy

they function as co-enzymes

enzymes are

proteins

________ binds to the active site of an enzyme

substrate

water held behind a dam would best reflect __________ energy

potential

according to the first law of themodynamics,

energy cannot be created or destroyed

what is a logical consequence of the second law of thermodynamics

every chemical reaction must increase the total entropy of the universe

the primary function of an enzyme or any biological catalyst is to

reduce the energy of activation and increase the rate of a reaction

which term most precisely describes the process of building larger molecules from smaller ones

anabolism

which term most precisely describes the cellular process of breaking down large molecules into smaller ones

catabolism

Kinetic energy can best be described as:

energy associated with movement

Which of the following equations would best describe free energy?

ΔH - TΔS

In an endergonic reaction:

ΔG is positive and the reaction is not spontaneous

When reactions are in chemical equilibrium:

the rate of formation of products equals the rate of formation of reactants

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