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Questions and Answers
Which category of amino acids contains those with a negative charge and are hydrophilic?
Which category of amino acids contains those with a negative charge and are hydrophilic?
Which amino acid is classified as neutral nonpolar and contains a sulfur atom?
Which amino acid is classified as neutral nonpolar and contains a sulfur atom?
Which amino acid is classified as neutral polar and has a hydroxyl group?
Which amino acid is classified as neutral polar and has a hydroxyl group?
Which amino acid is classified as neutral polar and is part of many important proteins and peptides, such as insulin and keratin?
Which amino acid is classified as neutral polar and is part of many important proteins and peptides, such as insulin and keratin?
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Which category of amino acids contains those with a positive charge and are hydrophilic?
Which category of amino acids contains those with a positive charge and are hydrophilic?
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Which amino acid is classified as neutral nonpolar and contains an aromatic benzene ring?
Which amino acid is classified as neutral nonpolar and contains an aromatic benzene ring?
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Which amino acid is classified as neutral nonpolar and can form disulfide bonds?
Which amino acid is classified as neutral nonpolar and can form disulfide bonds?
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Which amino acid is classified as neutral nonpolar and cannot rotate freely around alpha-C, making it unsuitable for protein structures that require rotation?
Which amino acid is classified as neutral nonpolar and cannot rotate freely around alpha-C, making it unsuitable for protein structures that require rotation?
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Which amino acid is classified as neutral nonpolar and is unique due to its ability to help bind metals?
Which amino acid is classified as neutral nonpolar and is unique due to its ability to help bind metals?
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Which amino acid is classified as neutral polar and is a site for phosphorylation?
Which amino acid is classified as neutral polar and is a site for phosphorylation?
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Which of the following is NOT a way in which nitrogen can be incorporated into an amino acid?
Which of the following is NOT a way in which nitrogen can be incorporated into an amino acid?
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Which enzyme is responsible for the conversion of glutamate to glutamine?
Which enzyme is responsible for the conversion of glutamate to glutamine?
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Which amino acid belongs to the pyruvate family?
Which amino acid belongs to the pyruvate family?
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Which amino acid family includes methionine and lysine?
Which amino acid family includes methionine and lysine?
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Which coenzyme is required for the direct incorporation of nitrogen from ammonia?
Which coenzyme is required for the direct incorporation of nitrogen from ammonia?
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Which amino acid is NOT a member of the glutamate family?
Which amino acid is NOT a member of the glutamate family?
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Which enzyme is responsible for the transamination reaction involving glutamate and pyruvate?
Which enzyme is responsible for the transamination reaction involving glutamate and pyruvate?
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Which amino acid is a precursor for the synthesis of purines and pyrimidines?
Which amino acid is a precursor for the synthesis of purines and pyrimidines?
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Which amino acid family includes threonine and lysine?
Which amino acid family includes threonine and lysine?
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Which coenzyme is required for the transamination reactions?
Which coenzyme is required for the transamination reactions?
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Which of the following is a symptom of Phenylketonuria (PKU)?
Which of the following is a symptom of Phenylketonuria (PKU)?
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What is the main function of histamine?
What is the main function of histamine?
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Which of the following is NOT a way of N-incorporation into amino acids?
Which of the following is NOT a way of N-incorporation into amino acids?
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Which part of the body has a high concentration of glutamine synthetase?
Which part of the body has a high concentration of glutamine synthetase?
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What is the purpose of the urea cycle?
What is the purpose of the urea cycle?
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Where does carbamoyl phosphate get its nitrogen from?
Where does carbamoyl phosphate get its nitrogen from?
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Which molecule is used to start the urea cycle?
Which molecule is used to start the urea cycle?
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What happens to urea after it is produced in the urea cycle?
What happens to urea after it is produced in the urea cycle?
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Which amino acids are classified as both glucogenic and ketogenic?
Which amino acids are classified as both glucogenic and ketogenic?
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Which category of amino acids contains those with a negative charge and are hydrophilic?
Which category of amino acids contains those with a negative charge and are hydrophilic?
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Which amino acid is classified as neutral nonpolar and contains an aromatic benzene ring?
Which amino acid is classified as neutral nonpolar and contains an aromatic benzene ring?
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What is a function of sulphur containing AAs?
What is a function of sulphur containing AAs?
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Which amino acid is classified as neutral polar and has a hydroxyl group?
Which amino acid is classified as neutral polar and has a hydroxyl group?
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Which of the following amino acids is classified as both glucogenic and ketogenic?
Which of the following amino acids is classified as both glucogenic and ketogenic?
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Which enzyme is responsible for the conversion of glutamate to glutamine?
Which enzyme is responsible for the conversion of glutamate to glutamine?
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Where does the ammonia come from in the urea cycle?
Where does the ammonia come from in the urea cycle?
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Which amino acid is classified as neutral polar and contains a sulfur atom?
Which amino acid is classified as neutral polar and contains a sulfur atom?
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Which amino acid family includes proline and arginine?
Which amino acid family includes proline and arginine?
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Which amino acid is classified as neutral polar and is a precursor for the synthesis of purines and pyrimidines?
Which amino acid is classified as neutral polar and is a precursor for the synthesis of purines and pyrimidines?
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Which coenzyme is required for the direct incorporation of nitrogen from ammonia?
Which coenzyme is required for the direct incorporation of nitrogen from ammonia?
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What is the main function of histamine?
What is the main function of histamine?
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Which amino acid is classified as neutral nonpolar and contains a sulfur atom?
Which amino acid is classified as neutral nonpolar and contains a sulfur atom?
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Study Notes
Amino Acid Categories and Properties
- Amino acids with a negative charge and hydrophilic characteristics belong to the acidic amino acids category.
- Neutral nonpolar amino acid containing a sulfur atom is methionine.
- Neutral polar amino acid with a hydroxyl group is serine.
- A neutral polar amino acid pivotal in proteins like insulin and keratin is cysteine.
- Amino acids with a positive charge and hydrophilic properties fall under the basic amino acids category.
- Neutral nonpolar amino acid featuring an aromatic benzene ring is phenylalanine.
- Neutral nonpolar amino acid that can form disulfide bonds is cysteine.
- Neutral nonpolar amino acid that cannot rotate freely around alpha-C is proline.
- Neutral nonpolar amino acid that aids in metal binding is histidine.
- Neutral polar amino acid functioning as a site for phosphorylation is threonine.
Enzymes and Metabolism
- Glutamate to glutamine conversion is catalyzed by glutamine synthetase.
- Alanine belongs to the pyruvate family of amino acids.
- The amino acid family that includes methionine and lysine is known for essential amino acids.
- Required coenzyme for direct nitrogen incorporation from ammonia is glutamate dehydrogenase.
- Aspartate is NOT a member of the glutamate family.
- Transamination reaction involving glutamate and pyruvate is facilitated by aminotransferases.
- Glutamine serves as a precursor for the synthesis of purines and pyrimidines.
- The family that includes threonine and lysine is termed essential amino acids.
- Required coenzyme for transamination reactions is pyridoxal phosphate.
Conditions and Functions
- Phenylketonuria (PKU) symptoms include intellectual disability and seizures.
- The main function of histamine is promoting immune responses and regulating physiological functions in the stomach.
- Glutamine synthetase is concentrated in the brain and liver.
- The urea cycle aims to detoxify ammonia and excrete it as urea.
- Carbamoyl phosphate derives its nitrogen primarily from ammonia.
- The starting molecule for the urea cycle is ornithine.
- After production, urea is transported to the kidneys for excretion.
- Amino acids classified as both glucogenic and ketogenic include tyrosine and isoleucine.
- Cysteine, classified as neutral polar, contains a sulfur atom.
- Sulfur-containing amino acids have roles in the formation of disulfide bonds, contributing to protein structure and stability.
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Description
Test your knowledge of amino acids classifications and properties with this quiz by Dr. Heisel. Categorize amino acids by polarity, identify unique groups, and match the 3-letter codes to their corresponding 1-letter codes.
