Ch 10 Intro Metabolism

Synthesis of complex bio molecules from simpler ones (anabolism)

Take up nutrients, export waste & maintain ion balances

Cell motility and movement of structures within cell.

Capacity to do work

Adenosine 5’-triphosphate a high E molecule used as cells energy currency

Study of E changes in a system

E neither created nor destroyed

Chemical and physical processes proceed such that Entropy increases

Measure of randomness and/or disorder

Give off heat.

Absorb heat

Amt of heat E need to raise 1g water 1 degree C

Units of work capable of being done

Heat content in a system

Amount of E in a system available to do useful work at constant temp and pressure

The free E of the system decreases

State where no net change is occurring & free E is at a minimum (forward rxn = reverse rxn)

[C][D] / [A][B] ( >1 then more products than reactants at equilibrium and will proceed as written

Free E change for a process at defined conditions of [], pressure, pH, and temp

Standard free E change when pH is 7 ( ie most cells) = -2.303 RT x log Keq (R=gas constant T=absolute temp)

1.9872 cal/ mol-degree 8.3145 J/mol-degree

A rxn than spontaneously goes to completion. Standard free E change is NEGATIVE, Keq > 1

Exergonic reactions ( Neg delta G)

Endergonic reactions ( used by cells to make ATP to “store” E)