lecture 1.10 Flashcards
(33 cards)
Catabolism=
as in take apart
Anaboilsm=
as in put together
Describe catabolism
usable energy-producing reactions or fueling reactions
provide ready source or reducing power (electrons)
generate precursors for biosynthesis
Describe Anabolism
the synthesis of complex organic molecules from simpler ones
requires energy derived by fueling reactions
Describe the first law of thermodynamics
Energy can be neither created nor destroyed
Total energy in universe remains constant
Describe the second law of thermodynamics
Entropy–amount of disorder in a system
Physical and chemical processes proceed in such a way that the disorder of the universe increases
Calorie=
amount of heat energy needed to raise 1 gram of water from 14.5 to 15.5°C
Joules=
units of work capable of being done by a unit of energy
1 cal = ___ joules?
1 cal of heat is equivalent to 4.1840 J of work
if G is negative, reaction is _________
spontaneous
if G is positive, reaction is ___________
not spontaneous
if G = 0, reaction is __________
at equalibrium
Exergonic reaction, then G is ______
negative
Endergonic reactions, then G is ________
positive
Exergonic reactions means the reaction will _______
proceed spontaneously
Endergonic reactions mean the reactions will ________
not proceed spontaneously
What is an oxidation reaction?
Electron carriers are often used to transfer electrons from an electron donor to an electron acceptor
more negative E0 means
better electron donor
more positive E0 means
better electron acceptor
The greater the difference between the E0
of the donor and the E0 of the acceptor means what in terms of G?
the more negative the Go´
What are some examples of electron carriers?
NAD, NADP, FAD, Coenzyme Q
What are the two types of Chemoorganotrophic energy supply?
Respiration
Fermentation
What are the two types of respiration and their differences?
aerobic: terminal electron acceptor is O2
anaerobic: some other terminal electron acceptor
What has no exogenous electron acceptor?
Fermentation
