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1.In the process of cellular respiration, oxygen ishowing page 1-2 out of 2

1.
In the process of cellular respiration, oxygen is important because it
A.
Acts as the final electron acceptor
B.
Donates protons to help establish the proton gradient in mitochondria
C.
Is essential in directly producing NADP
D.
enables the production of sugars in the choroplasts
E.
starts the process of glycolysis
2.
The disease pellagra results from
A.
insufficient quantities of NAD
B.
poisoning of the electron transport chain
C.
deficiencies in the functioning of the ATP synthase
D.
overproduction of pyruvate dehydrogenase
E.
a genetic defect in hemoglobin
3.
After absorption of a photon of light, chlorophyll
A.
donates an electron to NADPH
B.
donates a proton to the electron transport chain
C.
donates an amino group to a carboxyl group
D.
donates an electron to pheophytin
E.
donates energy to the mitochondria
4.
Chlorophyll and pheophytin differ in that
A.
chlorophyll is a protein while pheophytin is a carbohyudrate
B.
pheoyphytin is present in mitochondria while chlorophyll is in
chloroplasts
C.
chlorophyll has a magnesium ion in its ring while pheophytin does not.
D.
chlorophyll gives up protons while pheophytin gives up electrons
E.
there is no difference between clorophyll and pheophytin
5.
In plants, ATP synthase
A.
is present only in mitochondria and not chloroplasts
B.
is driven directly by electrons flowing down the electron transport chain
C.
is present in both mitochondria and chloroplasts
D.
runs backward in mitochondria compared to chloroplasts
E.
uses fundamentally different mechanisms to produce ATP in
mitochondria as compared to chloroplasts.