BIOLOGY
AMINO ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cysteine and serine
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cysteine and threonine
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methionine and cysteine
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methionine and serine
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Detailed explanation-1: -Methionine and cysteine are the two primary sulfur-containing amino acids in mammals. Methionine is an essential amino acid, obtained by dietary intake while cysteine is non-essential and a metabolite of methionine metabolism.
Detailed explanation-2: -Methionine and cysteine are the only two amino acids which contain sulphur.
Detailed explanation-3: -The correct option is B sulphur containing amino acids. Cysteine and methionine are sulphur containing amino acids.
Detailed explanation-4: -Methionine and cysteine are found in highest concentrations in animal proteins (e.g. muscle, organ meats, and eggs), and are present but at much lower levels in dairy (e.g. casein), cereal grains, and pulses (i.e. legumes).