Consider this reaction: PPi + H2O 2 Pi. What functional group (or linkage) in PP
ID: 95544 • Letter: C
Question
Consider this reaction: PPi + H2O 2 Pi. What functional group (or linkage) in PPi is hydrolyzed in this reaction? A. an alcohol functional group B. a phosphoester functional group C. a phosphoamide functional group D. a phosphoanhydride bond or linkage What would be the (net) yield of ATP from the complete (aerobic) catabolism of laurate (lauric acid)? A. 78 B. 80 C. 120 D. 122 Glycerol, released from triglycerides and phosphoglycerides, can be used in aerobic catabolism. How many ATP molecules would be produced in the complete aerobic catabolism of glycerol (per glycerol molecule)? A. 3 B. 16 C. 17 D. 18.5 E 32 How many CO_2 molecules would be produced in the complete aerobic catabolism of glycerol? A. 0 B.1 C. 2 D. 3 E.4 Which of the following is FALSE? A. Either pyruvate or lactate can be the starting point for gluconeogenesis in liver. B. Fatty acid synthesis is the direct reversal of fatty acid degradation. C. In the Cori cycle, gluconeogenesis occurs in liver and glycolysis in skeletal muscle. D. All of the above are false. Which of the following is an oxidizing agent (compounds capable of oxidizing other compounds)? A. NADH B. FADH2 C. ubiquinone (Q) D. all of the above Which is NOT true about transamination? A. If alpha-ketoglutarate is a reactant, Glu is a product. B. If Asp is a product, oxaloacetate is a reactant C. Pyruvate and Ala form an alpha-ketoacid/amino acid pair in transamintion. D. In a particular transamination reaction, ammonia (ammonium ion) is released from Glu. Which of the following is the overall reaction for lactic acid fermentation (the creation of 2 lactate from 1 glucose)? A. glucose + 2 ADP + 2 Pi + 2 NAD+ 2 pyruvate + 2 ATP+ 2 H2O + 2 NADH + H+ B. glucose + 2 ADP + 2 Pi + 2 NAD+ 2 lactate + 2 ATP + 2 H2O + 2 NADH + H+ C. glucose + 2 ADP + 2 Pi + 2 NAD+ 2 lactate + 2 ATP+2 H2O + 2 NADH + H + D. glucose 2 ADP + 2 Pi +2 H + 2 lactate + 2 ATP + 2 H2OExplanation / Answer
6. The pyrophosphate (PPi) is hydrolyzed to 2Pi. The B. phosphoester functional group is hydrolyzed in the reaction.
7. B. 80 ATP. Explanation: For lauric acid (C12):
in the activation step 2 ATP's are lost = -2 ATP
Dehydrogenation step occurs five times = 10 ATP
The six C2 fragments in a common pathway yields 72 ATP.
8. D. 18.5. Explanation: During aerobic catabolism, glycerol is converted to 3-phosphoglyceraldehyde, which degrades into pyruvate to form ATP through oxidative phosphorylation. The complete break down of a single glycerol molecule generates 19 ATP under aerobic conditions.
9. A.0. There are no CO2 molecules produced in the complete aerobic catabolism of glycerol.
10. B. fatty acid synthesis is the direct reversal of fatty acid degradation.
11. D. all of the above. An oxidizing agent or oxidant gains electrons and is reduced in a chemical reaction. NADH, FADH2, ubiquinone (Q) all are oxidizing agents.