BIOLOGY
AMINO ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Aspartate is an essential amino acid
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Lysine is a non-essential amino acid
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Leucine is commonly used as an ingredient in the buffers of SDS page
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Tryptophan and tyrosine are significantly more polar than phenylalanine
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Detailed explanation-1: -7. Which of the following is a true statement? Explanation: Because of the tyrosine hydroxyl group and the nitrogen of the tryptophan indole ring, tryptophan and tyrosine are substantially more polar than phenylalanine.
Detailed explanation-2: -Tyrosine and tryptophan are more polar than phenylalanine due to the presence of hydroxyl group in tyrosine and nitrogen in the indole ring of tryptophan.
Detailed explanation-3: -Phenylalanine, tyrosine and tryptophan all contain non-polar aromatic rings. Tyrosine and tryptophan are slightly less hydrophobic and slightly more reactive than phenylalanine because they contain an-OH and-NH group, respectively.
Detailed explanation-4: -Since Tyrosine and Tryptophan are amino acids, their polarity is determined on their side chains or R groups. If their R groups are polar, the amino acid is polar. Both Tyrosine and Tryptophan are listed as non-polar molecules.
Detailed explanation-5: -Phenylalanine and Tyrosine. Phenylalanine is an essential amino acid meaning that it cannot be made in the body and must be ingested in the diet. Tyrosine is a nonessential amino acid and can be formed by the hydroxylation of phenylalanine in the liver when the intake of tyrosine in the diet is low.