Pre-test Biochemistry Part 2

Which of the following is not a biopolymer?

• Nucleic acids

• Carbohydrates

• Amino acids

• Lipids

Which of the following amino acids has an imino group?

• Phenylalanine

• Proline

• Tyrosine

• Threonine

Serotonin is synthesized from this amino acid.

• Tryptophan

• Threonine

• Tyrosine

• Alanine

Histamine , a chemical messenger, mediates allergic and inflammatory reactions, gastric acid secretion and neurotransmission of the brain. Which of the following amino acids, which when decarboxylated, yields histamine?

• Tyrosine

• Histidine

• Tryptophan

• Serine

The absence of this enzyme results to phenylketonuria.

• Phenylalanine dehydrogenase

• Phenylalanine hydroxylase

• Homogentisate oxidase

• Histidine decarboxylase