The amino acid which plays a central role in nitrogen metabolism is/are:

Identify the chemical reaction and the enzyme involved in the following process:
$\alpha$-Ketoglutaric acid + $NH_4^+ + NADPH \rightarrow$ Glutamate + $H_2O + NADP$

Which of the following is an example of a nutrient in its reduced form?

The removal of an amino group from an amino acid to transform it into a keto acid is known as:

Which one of the following enzymes contains $Mo$ as a prosthetic group?

Which mineral element plays a crucial role in nitrogen metabolism?