Amino acids present in cheese___________________?
Correct answer: C. tyrosine
- A. lysine
- B. alanine
- C. tyrosine
- D. proline
Explanation
Tyrosine is characteristically found among the amino acids present in cheese and may form crystals in aged cheese. Lysine, alanine and proline are also amino acids, but tyrosine is the expected food-chemistry answer here. A student may choose proline because it is associated with proteins, without recognising the specific cheese association tested.
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Proteins are polymers of amino acids joined by peptide bonds, and their biological roles depend on primary, secondary, tertiary and quaternary structure. Coverage includes enzymes, hormones, antibodies, transport proteins, muscle fibres and structural tissues, together with denaturation and the effects of heat, pH and chemicals.
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