2. A biochemist wanted to study how various substances were used in cellular respiration. In one...

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Biology

2. A biochemist wanted to study how various substanceswere used in cellular respiration. In one experiment, she allowed amouse to breathe air containing O2 \"labeled\" by a particularisotope. In the mouse, the labeled oxygen first showed up in
a. ATT.
b. NADH
C. CO2
d. H2O
3. A gram of fat produces _____ as much ATP as a gramof glucose.
a. two times
b. three times
c. four times
d. five times
4. The intermembrane space of mitochondria has a largeconcentration of
a. FADHz.
b. hydrogen ions.
C. NAD
d. oxygen
5. During pyruvate oxidation, a carboxyl group isfirst removed before NAD+ is reduced to NADH. Which of thefollowing molecules does the oxidized two-carbon molecule combinewith to produce the final substrate?
a. acetyl CoA
b. coenzyme A
C. pyruvate dehydrogenase
d. succinate
6. Which of the following is a true distinctionbetween cellular respiration and fermentation?
a. NADH is oxidized by passing electrons to the electron transportchain in respiration only.
b. Only respiration oxidizes glucose.
C. Substrate-level phosphorylation is unique to fermentation;
cellular respiration uses oxidative phosphorylation.
d. Fermentation is the metabolic pathway found inprokaryotes;
cellular respiration is unique to eukaryotes.

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3.6 Ratings (390 Votes)

2 the 1st step in cellular respiration is glycolysis that is breakdown of glucose into energy the oxygen combines with protons and electrons produced during the catalysis to yield water hence the 1st appearance of oxygen will be seen in water 3 A gram of fat has twice See Answer

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