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Which of the following are aromatic amino acids?
- a)Phenylalanine, tryptophan
- b)Serine, glutamic acid
- c)Alanine, glycine
- d)Lysine, valine
Correct answer is option 'A'. Can you explain this answer?
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Which of the following are aromatic amino acids?a)Phenylalanine, trypt...
Based on number of amino and carboxyl groups, there are acidic (e.g., glutamic acid), basic (lysine) and neutral (valine) amino acids. Similarly, there are aromatic amino acids (tyrosine, phenylalanine, tryptophan).
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Which of the following are aromatic amino acids?a)Phenylalanine, trypt...
Aromatic Amino Acids
Aromatic amino acids are characterized by the presence of an aromatic ring in their structure, which contributes to their unique properties and functions in proteins. The primary aromatic amino acids include:
Explanation of Option A
- Phenylalanine:
- Contains a benzyl side chain.
- Plays a crucial role in protein synthesis and is a precursor to other important molecules, including tyrosine, dopamine, and norepinephrine.
- Tryptophan:
- Contains an indole side chain.
- Important for the synthesis of serotonin, a neurotransmitter, and melatonin, a hormone that regulates sleep.
Why Other Options Are Incorrect
- Option B (Serine, Glutamic Acid):
- Serine is a polar amino acid, and glutamic acid is an acidic amino acid. Neither has an aromatic ring.
- Option C (Alanine, Glycine):
- Both are aliphatic amino acids without any aromatic characteristics. Alanine has a methyl side chain, and glycine is the simplest amino acid.
- Option D (Lysine, Valine):
- Lysine is a basic amino acid, and valine is branched-chain. Neither possesses an aromatic structure.
Conclusion
Thus, the correct answer is option 'A', as it includes the only aromatic amino acids listed: phenylalanine and tryptophan. Understanding these amino acids is vital for grasping their biochemical significance in various metabolic pathways and protein functions.
Aromatic amino acids are characterized by the presence of an aromatic ring in their structure, which contributes to their unique properties and functions in proteins. The primary aromatic amino acids include:
- Phenylalanine
- Tryptophan
Explanation of Option A
- Phenylalanine:
- Contains a benzyl side chain.
- Plays a crucial role in protein synthesis and is a precursor to other important molecules, including tyrosine, dopamine, and norepinephrine.
- Tryptophan:
- Contains an indole side chain.
- Important for the synthesis of serotonin, a neurotransmitter, and melatonin, a hormone that regulates sleep.
Why Other Options Are Incorrect
- Option B (Serine, Glutamic Acid):
- Serine is a polar amino acid, and glutamic acid is an acidic amino acid. Neither has an aromatic ring.
- Option C (Alanine, Glycine):
- Both are aliphatic amino acids without any aromatic characteristics. Alanine has a methyl side chain, and glycine is the simplest amino acid.
- Option D (Lysine, Valine):
- Lysine is a basic amino acid, and valine is branched-chain. Neither possesses an aromatic structure.
Conclusion
Thus, the correct answer is option 'A', as it includes the only aromatic amino acids listed: phenylalanine and tryptophan. Understanding these amino acids is vital for grasping their biochemical significance in various metabolic pathways and protein functions.
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Which of the following are aromatic amino acids?a)Phenylalanine, tryptophanb)Serine, glutamic acidc)Alanine, glycined)Lysine, valineCorrect answer is option 'A'. Can you explain this answer?
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