Which of the following is NOT true of the urea cycle? Uses CO2 (or bicarbonate)

Question

Which of the following is NOT true of the urea cycle? Uses CO2 (or bicarbonate) formed by the TCA cycle. Uses NH3 released principally from glutamate by the action of GDH. Uses ATP made from ADP and Pi, as driven by NADH oxidation by the electron transport system and oxidative phosphorylation. Uses nitrogen supplied by other amino acids via intra-mitochondrial transamination. None of the above is false. Which of the following amino acids gets all of its carbon atoms from glutamate? Phenylalanine Proline Threonine Valine Leucine

Explanation / Answer

In ques 47 first option is false as urea cycle and tca are independent but they link once where urea cycle obtain its one nitrogen from tca not co2.

In ques 48 proline is such amino acid which synthesis from glutamate i.e. It gets all its carbons from glutamate only.

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