In the absence of oxygen, pyruvate cannot be converted into
acetyl-CoA. It is instead converted to ____ and must go
to the Cori Cycle into glucose to generate energy. You
would notice this during your exercise.
lactic acid
ketones
glucose
lactose
in detail how is energy stored in pyruvate converted into
adenosine triphosphate (ATP) in eukaryotic cells?
please explain with lots of detail as I am struggling to
understand this concept. :(
thanks in advance.
1. Oxaloacetate can be converted into
several different metabolic compounds. Briefly discuss each one,
and include whether that is part of a catabolic or anabolic
pathway.
2. There
are several allosteric regulators of pyruvate carboxylase. For each
one, explain the following:
o Is this molecule an
allosteric activator or allosteric inhibitor?
o Why does it make
sense that it would regulate the enzyme in that way?
o Does this
inhibitor/activator stabilize the R state or T state of the
enzyme?
Acetyl CoA
Aspartate
3. Draw a...
Compare the ATP yield of three glucose molecules that enter
glycolysis and are converted to pyruvate with that of three glucose
molecules that proceed through the pentose phosphate pathway such
that their carbon skeletons (as two F6P and one GAP) reenter
glycolysis and are metabolized to pyruvate. Indicate the steps
where ATP was used or produced and the overall ATP totals.
Compare the ATP yield of three glucose molecules that enter
glycolysis and are converted to pyruvate with that of three glucose
molecules that proceed through the pentose phosphate pathway such
that their carbon skeletons (as two F6P and one GAP) reenter
glycolysis and are metabolized to pyruvate. Indicate the steps
where ATP was used or produced and the overall ATP totals.
NADH is required for the one-step reaction by which pyruvate is
converted to;
A.
Oxaloacetate
B.
Acetyl CoA
C.
Phosphoenolpyruvate
D.
Lactate
Bacterial DNA is not bound to histones unlike eukaryotic DNA
T/F?
All sphingolipids have in common which of the
following?
A. A glycerol backbone
B. Ceramide
C. Phosphorylcholine
D. N-acetylneuraminic acid (NANA)
E. A steroid ring structure to which spingosine is attached
In gluconeogenesis, pyruvate is converted to PEP in two
reactions. These reactions include an initial carboxylation
followed by a decarboxylation in the second reaction. Based on
these two reactions, you would assume that if radio-labeled 14CO2
was present in the reactions, it would not be incorporated into
PEP. However, when 14CO2 is present with rat liver cells 14C slowly
begins to appear in PEP and eventually on carbons 3 and 4 of
glucose. Diagram a series of reactions that would...
Cytosolic pyruvate is
the end product of glycolysis. Its fate depends on the metabolic
status of the cell. If there is plenty of oxygen, the aerobic
pathway dominates. If oxygen is insufficient, the anaerobic pathway
dominates. Associate each of the following characteristics with
either the aerobic or anaerobic fate of pyruvate.
Catalyzed by lactate dehydrogenase
Catalyzed by pyruvate dehydrogenase complex
Oxidizes NADH
Oxidizes pyruvate
Produces acetyl CoA
Produces lactate
Recycles NADH to NAD+
Redirects glucose oxidation to the mitochondrion
Reduces...