Please, I need Help to answer these 5 Questions

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Please, I need Help to answer these 5 Questions

Post by togetherforever » Tue Mar 13, 2007 4:49 pm

Please if you know the answer of these 5 Questios help me:

1)The glycolytic pathway from glucose to pyruvic acid involves a lengthy series of different chemical reactions. Each individual reaction requires:
a) a molecule of ATP
b) a molecule of NAD+
c) a molecule of a specific enzyme
d) a molecule of NADP+

2) When a muscle cell is metabolizing glucose in the complete absence of molecular oxygen, which one of the following substances is not produced?
a) Glyceraldehyde-3-phosphate
c)Pyruvic acid
d)Lactic acid

3)When a molecule of glucose is completely broken down in a cell to water and CO2, some ATP molecules are synthesized by substrate-level phosphorylation and some by chemiosmotic phosphorylation via the electron- transport system. What percentage of the total number of ATP molecules formed comes from the latter process?

4)Cyanide blocks the respiratory electron-transport chain. As a result of:
a)The Krebs cycle speeds up
b)Electrons and hydrogen cannot flow from NADH to oxygen
c)Three ATP molecules are produced for every pair of electrons
d)Production of water increases
e)Glycolysis is inhibited

5) Which metabolic pathway is a common pathway for both anaerobic and aerobic metabolism
a)The electron-transport chain
b)The citric acid cycle
d)the oxidation of pyruvic acid
e)the formation of acetyl-CoA


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Post by mith » Tue Mar 13, 2007 7:32 pm

Try reading forum rules. Thanks.
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