79 Questions
Which category of amino acids contains a benzene ring or a non-benzene hydrocarbon chain?
Neutral Nonpolar
Which amino acid is sometimes grouped with neutral polar amino acids due to its borderline polarity?
Cysteine
Which amino acid contains a thiol group that can form disulfide bonds?
Cysteine
Which amino acid can be phosphorylated and has an OH group?
Serine
Which amino acid can be phosphorylated and has an NH2 group?
Asparagine
Which type of amino acids contain sulfur?
Cystine and methionine
Which amino acid is part of important proteins and peptides such as keratin and insulin?
Cysteine
Which amino acid is involved in antioxidant reactions and can form disulfide bonds?
Cysteine
Which type of bonding can both the hydroxy and amido groups participate in?
Hydrogen bonding
Which amino acid is classified as Neutral Nonpolar and contains a benzene ring?
Phenylalanine
Which of the following is true about charged amino acids at pH = 7?
Acidic amino acids are negatively charged
Which of the following is NOT a way nitrogen can be incorporated into an amino acid?
Hydrogenation
Which coenzyme is required for transaminations?
PLP
Which enzyme is responsible for the transamination of glutamate to alanine?
ALT
Which amino acid family includes alanine, pyruvate, and alpha-ketoglutarate?
Glutamate family
Which amino acid belongs to the aspartate family?
Asparagine
Which amino acid family includes serine and glycine?
Serine family
Which amino acid family includes tryptophan and tyrosine?
Aromatic family
What is the clinical consideration associated with phenylketonuria (PKU)?
All of the above
What is the treatment for phenylketonuria (PKU)?
Dietary: approved diet can lead to normal development
Which vitamin coenzyme is used in the decarboxylation of histidine to histamine?
Vitamin B9
What are the two main pathways for nitrogen to get from extrahepatic tissues to the liver?
Glutamine synthetase reaction and glucose-alanine cycle
Which enzyme is responsible for the conversion of ornithine and carbamoyl phosphate to citrulline in the urea cycle?
Arginase
What is the purpose of the urea cycle?
To produce urea
Where does the ammonia come from in the urea cycle?
Glutamine synthetase reaction
Where does carbamoyl phosphate come from in the urea cycle?
Glutamine synthetase reaction
Which cycle does the urea cycle connect to via fumarate?
Krebs cycle
Which amino acids can be classified as both glucogenic and ketogenic?
Alanine, Cysteine, Glycine, Serine, Threonine, Tryptophan
Which amino acids can be classified as ketogenic?
Leucine, Phenylalanine, Tyrosine
Why are some amino acids not classified as glucogenic even though they are part of the citrate boxes in the Krebs cycle?
They are not involved in gluconeogenesis
Which of the following is true about amino acids at pH = 7?
They are zwitterions with no net charge across N- and C- terminals.
Where does the nitrogen in amino acids come from?
Plants
What happens to the nitrogen in amino acids when animals ingest plants?
It is decomposed and released back into the soil.
What are the general properties of amino acids at pH = 7?
They are amphoteric.
What is the main source of nitrogen for plants?
Atmosphere
What is the term used to describe amino acids that cannot be synthesized by the body and must be obtained from the diet?
Essential amino acids
Which of the following is NOT a property of amino acids at pH = 7?
Acidic
What is the term used to describe amino acids that have a benzene ring or a non-benzene hydrocarbon chain?
Aromatic amino acids
What is the term used to describe amino acids that can act as both glucogenic and ketogenic?
Conditionally essential amino acids
What is the term used to describe amino acids that have both a positive and a negative charge, resulting in no net charge across N- and C- terminals?
Zwitterions
Which amino acids are classified as branched chain amino acids (BCAA’s)?
Valine, Leucine, Isoleucine
Which amino acids are classified as essential amino acids (EAA)?
Lysine, Methionine, Phenylalanine, Threonine, Tryptophan
Which amino acids are considered essential in infants but not in adults?
Histidine and Arginine
Which of the following is true about complete proteins?
They contain sufficient amounts of essential amino acids (EAA) to support health
Which of the following is NOT a complete protein?
Soy
Which of the following is considered by some sources to be a complete protein?
Quinoa
Which amino acid family includes serine and glycine?
Serine family
Which category of amino acids contains a benzene ring or a non-benzene hydrocarbon chain?
Aromatic amino acids
Which type of amino acids contain sulfur?
Sulfur-containing amino acids
Which enzyme is responsible for the transamination of glutamate to alanine?
Alanine aminotransferase
Which of the following best describes the properties of amino acids at pH = 7?
A and D are correct
What is the main source of nitrogen for plants in the nitrogen cycle?
Atmospheric nitrogen
What happens to the nitrogen in amino acids when animals ingest plants?
The nitrogen is used to form proteins
Which of the following amino acids are classified as essential amino acids (EAA)?
Leucine and valine
What is the term used to describe amino acids that can act as both an acid and a base?
Amphoteric
Which of the following amino acids is classified as a branched chain amino acid (BCAA)?
Leucine
Which of the following is NOT a complete protein?
Beans
Which of the following amino acids is classified as an essential amino acid (EAA)?
Methionine
Which of the following amino acids is considered a subset of the essential amino acids (EAA) and is highly enriched in blood leaving the liver?
Leucine
Which of the following is true about plant products as a source of complete proteins?
Plant products have a variable amino acid composition
Which of the following is true about zwitterions?
They have both a positive and a negative charge
Which of the following is NOT a property of amino acids at pH=7?
Act as a reducing agent
Which of the following is true about the nitrogen cycle?
All of the above
What is the term used to describe amino acids that cannot be synthesized by the body and must be obtained from the diet?
Essential amino acids
What is the main source of nitrogen for plants?
Atmosphere
Which enzyme is responsible for the transamination of glutamate to alanine?
Alanine aminotransferase
Which amino acid is involved in antioxidant reactions and can form disulfide bonds?
Cysteine
Which amino acid is part of important proteins and peptides such as keratin and insulin?
Methionine
Which amino acid is sometimes grouped with neutral polar amino acids due to its borderline polarity?
Tyrosine
Which of the following is true about branched chain amino acids (BCAA’s)?
BCAA’s are classified as essential amino acids
Which of the following is true about essential amino acids (EAA)?
EAA’s are required in the diet and include valine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, and tryptophan
Which of the following is NOT a complete protein?
Plant products
Which of the following is true about soy as a source of complete proteins?
Soy is not usually considered a complete protein
Which of the following is true about quinoa as a source of complete proteins?
Quinoa is considered a complete protein
Which of the following is true about the amino acid composition of beans?
Beans are low in methionine
Which of the following is true about the amino acid composition of wheat?
Wheat is low in lysine
Which of the following is true about the amino acid composition of corn?
Corn is low in both methionine and lysine
Which of the following is true about amino acids in general at pH = 7?
Amino acids have no net charge
Which of the following is true about the classification of amino acids based on their charge at pH = 7?
Amino acids can have both a positive and a negative charge at pH = 7
Test your knowledge of amino acid classifications and properties with this quiz! Learn about the different categories of amino acids based on polarity, including neutral nonpolar, neutral polar, acidic, and basic. Discover the unique properties of each category and explore specific amino acid groups. Are you ready to categorize and describe amino acids like a pro? Take the quiz now!
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
