A241 AA

Pledge: I promise to uphold academic integrity by not copying, cheating, or using unauthorized assistance during this test, ensuring that my work reflects my own effort and understanding.

• Yes

• No

Which of the following is a process involved in amino acid anabolism?

• Deamidation

• Amidation

• Oxidative deamination

• Urea cycle

Which enzyme is primarily responsible for transamination in amino acid metabolism?

• Glutamate dehydrogenase

• Aminotransferase

• Carbamoyl phosphate synthetase

• N-acetylglutamate synthase

What are the main sources of the amino acid pool in the body?

• Liver synthesis, hormones, and adipose tissue

• Dietary intake, cellular protein catabolism, and liver

• Glucose metabolism, dietary fats, and muscle protein

• Only dietary protein intake

Which of the following amino acids is exclusively ketogenic?

• Leucine

• Glutamate

• Aspartate

• Alanine

What is the regulatory enzyme for the urea cycle?

• Aminotransferase

• Carbamoyl phosphate synthetase

• N-acetylglutamate synthase

• Glutamate dehydrogenase

During starvation, increased levels of urea are a result of:

• Increased dietary protein intake

• Decreased nitrogen metabolism

• Breakdown of muscle proteins for energy

• Increased levels of glucagon in the pancreas

Which of the following is true about amino acid catabolism?

• It is an endergonic process.

• It requires oxygen for energy release.

• It involves the direct incorporation of NH₄⁺.

• It converts kinetic energy into potential energy.

Which vitamin is essential for aminotransferase enzyme activity?

• Vitamin B12

• Vitamin C

• Vitamin B6

• Vitamin D

What is the role of glutamate in oxidative deamination?

• It acts as a nitrogen donor for urea synthesis.

• It is converted into α-ketoglutarate, releasing NH₄⁺.

• It serves as an energy source during catabolism.

• It catalyzes the conversion of aspartate to oxaloacetate.