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Question 24.6: What are the sites and end products for the digestion of pro...

What are the sites and end products for the digestion of proteins?

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The digestion of proteins begins in the stomach and is completed in the small intestine to yield amino acids.

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Question: 24.11

Identify the citric acid cycle intermediate produced by each of the following amino acids. Determine the number of ATP that can be produced when that intermediate proceeds through the remaining steps of the citric acid cycle and the resulting coenzymes are oxidized in electron transport: a. proline ...

Verified Answer:

a.  Proline is converted to the citric acid cycle ...
Question: 24.10

Indicate the reaction in the urea cycle where each of the following compounds is a reactant:  a. aspartate  b. ornithine  c. arginine ...

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a.  Aspartate and citrulline undergo condensation ...
Question: 24.9

Indicate whether each of the following represents a transamination or an oxidative deamination: a. Glutamate is converted to α-ketoglutarate and NH4^+.  b. Alanine and α-ketoglutarate react to fonn pyruvate and glutamate. ...

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a.  Oxidative deamination occurs when the —...
Question: 24.8

Write the equation for the transamination of glutamate and oxaloacetate by drawing the condensed structural formulas. ...

Verified Answer:

\underset{Glutamate }{{}^{-}OOC — \overset...
Question: 24.7

With a positive nitrogen balance, why are excess amino acids excreted? ...

Verified Answer:

Because the body cannot store nitrogen, amino acid...
Question: 24.5

Malonyl ACP is required for the elongation of fatty acid chains. a. Complete the following equations for the formation of malonyl ACP from the starting material: Acetyl CoA + HCO3^- + ATP →   Malonyl CoA + HS — ACP →  b. What enzymes catalyze these reactions? ...

Verified Answer:

a.  Acetyl CoA combines with bicarbonate to fonn m...
Question: 24.4

The process called ketogenesis takes place in the liver. a. What are some conditions that promote ketogenesis?  b. What are the names of the three compounds called ketone bodies? ...

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a.  When excess acetyl CoA cannot be processed by ...
Question: 24.3

How many ATP will be produced from the β oxidation of palmitic acid, a C16 saturated fatty acid? ...

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Palmitic acid (C_{16}) requires sev...
Question: 24.2

Match each of the following (a to d) with one of the reactions (1 to 4) in the β oxidation cycle: 1. first oxidation  2. hydration  3. second oxidation  4. cleavage  a. Water is added to a trans double bond.  b. An acetyl CoA is removed.  c. FAD is reduced to FADH2.  d. A 3-hydroxyacyl CoA is ...

Verified Answer:

a.  (2) hydration                                 ...
Question: 24.1

Answer each of the following about the initial steps in the digestion of triacylglycerols: a. Where do these steps take place?  b. What enzyme is involved? c. What are the initial products of the digestion of triacylglycerols? ...

Verified Answer:

a.  the small intestine                           ...