Exam 17: Amino Acid Metabolism

Carbamoyl phosphate synthetase

Nitrogenases

Industrially, nitrogen for use in fertilizers is converted to ammonia by .

Glycine is a precursor for all of the following except

The enzyme is one of the most abundant in liver mitochondria and catalyzes the synthesis of the molecule shown below.

Physiological roles for glutamate dehydrogenase include all of the following, except

Virtually all of the nitrogen used in metabolism comes directly from nitrogen fixation.

Which of the following amino acids is/are derived from 3-phosphoglycerate?

What type of reaction is shown below? ^{Amino acid} + ^α-^{Ketoglutarate}⇋ ^α-^{Keto acid} + ^Glutamate

Which of the following is/are true statements) about glutamine?

The degradation of which amino acid requires the coenzyme tetrahydrofolate?

In animals glutamate synthase is essential for the production of glutamate.

Which statements) apply to urea?

Most animals and plants can tolerate moderately high cellular concentrations of ammonia; however, unusable excess is generally eliminated via the urea cycle.

Transamination reactions require which coenzyme?

The carbon in urea originates from .

In the urea cycle which molecule is transported from the mitochondrial matrix to the cytosol as ornithine is transported in the opposite direction?

Protein turnover of regulatory proteins helps cells to quickly respond to changing conditions.

The proteases responsible for cell death are called . They cleave on the carboxyl side of residues.

Phenylketonuria PKU) is a disease caused by a defect in formation.