1. Histidine is degraded to α-ketoglutarate and is described as a

A. gluco amino acid
B. glucogenic amino acid
C. ketogenic amino acid
D. keto-gluco amino acid

2. Which of the following amino acids is considered as both ketogenic and glucogenic?

A. Valine
B. Tryptophan
C. Lysine
D. None of these

3. A glucogenic amino acid is one which is degraded to

A. keto-sugars
B. either acetyl CoA or acetoacetyl CoA
C. pyruvate or citric acid cycle intermediates
D. none of the above

4. Which of the following is the best described glucogenic amino acid?

A. Lysine
B. Tryptophan
C. Valine
D. None of these

5. A person with phenylketonuria cannot convert

A. phenylalanine to tyrosine
B. phenylalanine to isoleucine
C. phenol into ketones
D. phenylalanine to lysine