Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) Citric acid cycle intermediates are often the products from amino acid carbon skeleton degradation.
(2) The net effect of transamination is to collect the amino groups from a variety of amino acids into the amino acids glutamate and aspartate.
(3) All of the reactions of the urea cycle occur within mitochondria.

Question

Quizplus · Accepted Answer

(1) FALSE - Citric acid cycle intermediates are not products of amino acid carbon skeleton degradation. Rather, they are involved in the oxidation of acetyl-CoA to CO2 in the mitochondrial matrix.
(2) TRUE - Transamination is the transfer of an amino group from an amino acid to an α-keto acid. The net effect is to collect amino groups from a variety of amino acids into a few common amino acids such as glutamate and aspartate.
(3) FALSE - The reactions of the urea cycle occur in both the cytosol and the mitochondrial matrix.

Use the Following to Answer the Questions Below