Flashcards in Respiration and Fermentation Deck (47)
4 stages of cellular respiration
2. pyruvate processing
3. krebs cycle
Is the process linear?
do not always have to start with glucose
made up of anabolic and pathways
Where are catabolic intermediates used?
in anabolic pathways
synthesize new molecules
break down molecules
Example of a catabolic intermediate
make up cellular respiration
Where does glycolysis take place?
outside the mitochondria, in the cytoplasm
Main goal of glycolysis
to break down glucose to make pyruvate
What does glycolysis produce?
2 molecules pyruvate, 2 net ATP, 2 NADHS
Is glycolysis anaerobic or aerobic?
Anaerobic (no O2)
What are the two phases glycolysis?
1. energy investment (input 2 ATP)
2. energy payoff
What happens during energy investment in glycolysis?
Free energy increases
direct process where ATP is bounded directly to an enzyme
occurs in glycolysis
In overall equation, what is being oxidized and what is being reduced?
glucose is being oxidized
O2 is being reduced
What does NAD+ get reduced to?
this is the form that it is carrying more electrons in
What type of molecules serve as electron acceptors?
Molecules with low potential energy
Where do all the carbons of glucose end up when glucose is completely oxidized?
*think about net equation
If glucose was labeled with radioactive carbons, where would you expect the carbons to end up?
all biological molecules
intermediates in cellular respiration can go on to form other things besides going to the ETC
Ex: Acetyl-CoA is used in synthesis of fatty acids
The molecule that is doing the reducing, therefore it is giving up electrons and being OXIDIZED
it will have less electrons and lower potential energy
What process will proceed whether oxygen is present or not?
the sum of chemical reaction that take place within each cell of a living organism and provide energy for the entire organism
an allosteric enzyme that catalyzes an early stage of glucose (breaks down fructose)
negative feedback of ATP regulates
Where does pyruvate processing take place?
In the mitochondrial matrix
What is pyruvate processing catalyzed by?
Negative feedback by ATP
Net products of pyruvate processing
What happens in pyruvate processing?
two carbons from pyruvate combine with co-A
Which energy storing molecule carries the highest amount of chemical energy?
Since it releases the most free energy when formed
Where does the citric acid cycle take place?