Redox Reactions and Respiration Flashcards
Why are redox reactions important?
used to get energy for the cell which is then stored as ATP.
What happens during oxidation reduction reaction?
energy is released through the transfer of electrons
The molecule that ________ the electrons is oxidized
loses
the molecule that ________ the electrons is reduced
gains
What happens during the two half reactions?
- donation of electrons by the donor
- acceptance of electrons by the acceptor
T/F all half reactions are written as reductions
T
Why are all half reactions written as reduction?
easiest to put them all into the same orientation
the equilibrium constant for half reactions is called the _______ _________ ______ (delta E) and is measured in volts
standard reduction potential
If the standard reduction potential (delta E) is negative, the reaction is more likely to progress _________, and is more likely to be a ________
backwards, donator
If the standard reduction potential (delta E) is positive, the reaction is more likely to progress _________, and is more likely to be a ________
forwards, acceptor
T/F a redox pair will always be written as acceptor(+)/donor(-)
T
In the redox pair of CO2/methanol, which molecule will donate electrons
methanol
in a redox reaction with NAD+/NADH and NO3-/NO2- what will be the electron donor and what will be the acceptor?
NO3- is the acceptor
NADH is the donor
In the electron tower, the most ________ reduction potentials are at the top and the most _______ are at the bottom
negative, positive
What do the variables stand for in the following equation?
ΔG° = -nFΔE°
ΔG° = change in free energy
-n = number of electrons involved
F = faradays constant (96.5 kJ/V)
ΔE° = change in standard reduction potential
the larger the ΔE°, the _______ the amount of free energy made available
greater
E°acceptor - E°donor will always be ________
positive
Redox reactions are facilitated by enzymes and the __________ are typically electron carriers
co-enzymes
The most negative reduction potentials paired with the most positive reduction potentials will release the ________ energy
most
Coenzymes/ electron carriers are ________ linked
loosely
________ are important enzymes that act as coenzymes
vitamins
There are __ parts to NAD+ (nicotinamide adenine dinucleotide)
3
what is the key part of NAD+, why?
in the nitrogenous base is a heteroaromatic ring, which allows NAD+ to be a greta electron carrier
The key for NAD+ is its ability to ________ electrons and protons, and accept them more _______
pick-up, easily
ATP is the primary ________ currency for the cell
energy
ATP provides the _______ for the ______ needed within a cell
energy, work
