Shared Flashcard Set

Details

MCAT: BIO 3
Cellular Metabolism
30
Biology
Graduate
08/27/2009

Additional Biology Flashcards

 


 

Cards

Term
cellular metabolism
Definition
sum total of all chemical reactions that take place in a cell
Term
two types of cellular rxns
Definition
1. anabolic: use E to make things
2. catabolic: break things to make E
Term
is photosynthesis anabolic or catabolic
Definition
anabolic
Term
photosynthesis reaction equation
Definition
6CO2+6H20+E-->C6H12O6+6O2
Term
what are the main energy carriers in metabolic systems?
Definition
atp, nadh, fadh2, nadph
Term
where is atp Energy stored?
Definition
in the bonds of the phosphate
Term
how do cells release energy in ATP? how much?
Definition
hydrolysis, 7kcal/mol of ATP
Term
What are the phosphates on ATP called when they are not attached?
Definition
inorganic phosphate
Term
is the break down of glucose reduction or oxidation?
Definition
oxidation
Term
how do NAD, nadp and fad work?
Definition
they transfer high potential electrons from the oxidation of glucose to the electron transport chain
Term
in what form are high potential electrons transfered?
Definition
H-
Term
oxidation and reduction
Definition
oxidation: loss of electrons
reduction: gain of electrons
Term
what are the two main stages of the breakdown of glucose?
Definition
glycolysis and cellular respiration
Term
substrate level phosphorylation
Definition
ATP production at glycolysis and Krebs
Term
fermentation
Definition
Glycolysis in absense of O2. In order to "turn" the glycolysis wheel you need NAD+. W/o oxygen respiration isn't creating the NAD+. So instead, pyruvate is ultimately reduced by NADH to create more NAD+/
Term
two types of fermentation
Definition
alcohol fermentation
lactic acid
Term
how many atp are produced by respiration?
Definition
36-38
Term
where does cellular respiration take place?
Definition
mitochondria
Term
3 stages of cellular respiration
Definition
1. pyruvate decarboxylation
2. citric acid cycle
3. electron transport chain
Term
other names for the citric acid cycle
Definition
kreb's
tricarboxcylic acid cycle
Term
where does the electron transport chain take place
Definition
inner mitochondrial membrane
Term
ultimate product of ETC
Definition
make ATP via oxidative phosphorylation
Term
what are the most prevalent molecules of the ETC?
Definition
cytochromes
Term
what are cytochromes constructed of?
Definition
one iron atom that can be repeatedly oxidized and reduced
Term
1st molecule in ETC
Definition
flavin mononucleotide (FMN)
Term
how does the ETC turn?
Definition
NADH and FADH2 drop of electrons in the form of 2e-. THey first drop them off at FMN which is consequently reduced. As FMN passes the 2e- onto the next molecule, it becomes oxidized. repeat.
Term
sequence of ETC complex
Definition
1.FMN
2.Q
3. B-C complex
4. cytochrome oxidase complex
Term
what happens at the end of the ETC?
Definition
.5 of an O2 takes the 2e- and picks up 2H+ making h20.
Term
two poisons that effect etc
Definition
cyanide and dinitrophenol
Term
how many atp do nadh and fadh2 make? why are they different?
Definition
nadh:3 fadh2:2
Fadh2 bypasses the FMN complex
Supporting users have an ad free experience!