Hello would anyone please be able to help me with these questions? 1-All the dec

Question

Hello would anyone please be able to help me with these questions?

1-All the decarboxylation steps of the citric acid cycle:

Select one:

a. Involve FAD

b. Require NAD+

c. Take place after the substrate is reduced to four carbons

d. Require molecular oxygen

e. All of the above

2-How many ATP are obtained by substrate-level phosphorylation during a complete oxidation of a single glucose molecule (net yield, include Glycolysis, PDH reaction and the Krebs' cycle)?

Select one:

a. 1

b. 2

c. 4

d. 6

e. 32

3-Which is FALSE: During the oxidation of pyruvate through the PDH reaction and the Krebs Cycle-

Select one:

a. three oxygen atoms and nine hydrogen atoms are added to the substrates in various steps

b. the number of hydrogen pairs transferred to electron carriers equals the number of hydrogen atoms that are present in pyruvate

c. the number of oxygen atoms released as CO2 exceeds the number of oxygen atoms present in pyruvate

d. the number of carbon atoms released as CO2 equals the number of carbon atoms present in pyruvate

e. all the answers are correct

Explanation / Answer

1: decarbooxylation require NAD+ , since this reaction is catalysed by ehydrogenase; remember whenever a reactio is catalysed by dehydrogenase it involves NAD.

2: 32 ATP

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