Podcast
Questions and Answers
Which one of the following is true about proteinogenic amino acids?
Which one of the following is true about proteinogenic amino acids?
- They are intermediates in biosynthetic pathways
- They are nonproteinogenic amino acids
- They are incorporated into proteins during translation (correct)
- They form peptide bonds
What is the function of proteins?
What is the function of proteins?
- Catalyzing reactions
- Transport
- DNA replication
- All of the above (correct)
Which level of protein structure refers to the overall 3D structure of a single polypeptide chain?
Which level of protein structure refers to the overall 3D structure of a single polypeptide chain?
- Primary structure
- Quaternary structure
- Tertiary structure (correct)
- Secondary structure
What are the two bond angles that biochemists look at within an amino acid chain?
What are the two bond angles that biochemists look at within an amino acid chain?
Which type of amide bond is overwhelmingly preferred in proteins?
Which type of amide bond is overwhelmingly preferred in proteins?
What are the two ends of a peptide/protein chain called?
What are the two ends of a peptide/protein chain called?
Which secondary structure is stabilized by intermolecular hydrogen bonds?
Which secondary structure is stabilized by intermolecular hydrogen bonds?
Which direction is more energetically favorable for alpha helices to turn?
Which direction is more energetically favorable for alpha helices to turn?
Which amino acid is less common in alpha helices due to its ring structure and lack of N-H bond?
Which amino acid is less common in alpha helices due to its ring structure and lack of N-H bond?
What is the function of alpha helices in proteins?
What is the function of alpha helices in proteins?
Which secondary structure is made up of linear strands of adjacent peptides?
Which secondary structure is made up of linear strands of adjacent peptides?
How can the adjacent strands of peptides in a beta sheet run?
How can the adjacent strands of peptides in a beta sheet run?
Which of the following is true about proteinogenic amino acids?
Which of the following is true about proteinogenic amino acids?
Which of the following is NOT a group in which proteinogenic amino acids are typically divided based on their side chains?
Which of the following is NOT a group in which proteinogenic amino acids are typically divided based on their side chains?
Which of the following is a hydrophobic/non-polar amino acid?
Which of the following is a hydrophobic/non-polar amino acid?
Which of the following is an acidic amino acid?
Which of the following is an acidic amino acid?
Which of the following is true about the ionization of amino acids?
Which of the following is true about the ionization of amino acids?
Which of the following is true about the ionization of acidic amino acids?
Which of the following is true about the ionization of acidic amino acids?
Which type of amino acids can be used to synthesize proteins?
Which type of amino acids can be used to synthesize proteins?
Why are amino acids considered chiral?
Why are amino acids considered chiral?
What system is typically used to describe the chirality of amino acids?
What system is typically used to describe the chirality of amino acids?
How are proteins synthesized using amino acids?
How are proteins synthesized using amino acids?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which of the following is NOT a post-translational modification of proteins?
Which of the following is NOT a post-translational modification of proteins?
What is the role of RNA polymerase II in protein synthesis?
What is the role of RNA polymerase II in protein synthesis?
What is the most common post-translational modification of proteins?
What is the most common post-translational modification of proteins?
What is the 3D structure of multiple polypeptide chains assembled together to form a protein called?
What is the 3D structure of multiple polypeptide chains assembled together to form a protein called?
What are the two types of subunits in antibodies?
What are the two types of subunits in antibodies?
What is the process called when DNA is used as a template to synthesize mRNA?
What is the process called when DNA is used as a template to synthesize mRNA?
What are the enzymes responsible for attaching phosphate groups to proteins/small molecules called?
What are the enzymes responsible for attaching phosphate groups to proteins/small molecules called?
Which amino acid is phosphorylated by kinases?
Which amino acid is phosphorylated by kinases?
Which amino acid can undergo O-linkage glycosylation?
Which amino acid can undergo O-linkage glycosylation?
What system is typically used to describe the chirality of amino acids?
What system is typically used to describe the chirality of amino acids?
Which amino acid is achiral?
Which amino acid is achiral?
Which type of bond is responsible for stabilizing secondary structures of proteins?
Which type of bond is responsible for stabilizing secondary structures of proteins?
What are the two ends of a peptide/protein chain called?
What are the two ends of a peptide/protein chain called?
Which type of amino acid can undergo O-linkage glycosylation?
Which type of amino acid can undergo O-linkage glycosylation?
Which of the following is a non-proteinogenic amino acid?
Which of the following is a non-proteinogenic amino acid?
Which of the following groups are proteinogenic amino acids typically divided into based on their side chains?
Which of the following groups are proteinogenic amino acids typically divided into based on their side chains?
Which of the following is a hydrophobic/non-polar amino acid?
Which of the following is a hydrophobic/non-polar amino acid?
At physiological pH, what is the charge of zwitterions?
At physiological pH, what is the charge of zwitterions?
What is the pKa range for carboxylic acid groups in amino acids?
What is the pKa range for carboxylic acid groups in amino acids?
What is the pKa range for amino groups in amino acids?
What is the pKa range for amino groups in amino acids?
Which of the following is true about the Ramachandran plot?
Which of the following is true about the Ramachandran plot?
What is the function of alpha helices in proteins?
What is the function of alpha helices in proteins?
Which of the following is true about beta sheets?
Which of the following is true about beta sheets?
What is the primary difference between parallel and antiparallel beta sheets?
What is the primary difference between parallel and antiparallel beta sheets?
What is the function of protein domains?
What is the function of protein domains?
What is the tertiary structure of a protein?
What is the tertiary structure of a protein?
Which of the following is true about the primary structure of proteins?
Which of the following is true about the primary structure of proteins?
Which of the following is true about the secondary structure of proteins?
Which of the following is true about the secondary structure of proteins?
Which of the following is true about the tertiary structure of proteins?
Which of the following is true about the tertiary structure of proteins?
Which of the following is true about the quaternary structure of proteins?
Which of the following is true about the quaternary structure of proteins?
Which of the following bond angles do biochemists look at within an amino acid chain?
Which of the following bond angles do biochemists look at within an amino acid chain?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which of the following is true about quaternary protein structure?
Which of the following is true about quaternary protein structure?
Which of the following is responsible for synthesizing precursor mRNA?
Which of the following is responsible for synthesizing precursor mRNA?
Which of the following is NOT a post-translational modification of proteins?
Which of the following is NOT a post-translational modification of proteins?
Which amino acid is most commonly phosphorylated by kinases?
Which amino acid is most commonly phosphorylated by kinases?
What is the addition of sugar molecules to a protein called?
What is the addition of sugar molecules to a protein called?
Which of the following is true about antibodies?
Which of the following is true about antibodies?
Which of the following is NOT a characteristic of proteinogenic amino acids?
Which of the following is NOT a characteristic of proteinogenic amino acids?
Which group of proteinogenic amino acids is based on their side chain polarity?
Which group of proteinogenic amino acids is based on their side chain polarity?
Which amino acid side chain has a pKa value of 6.04 and is 4% ionized at physiological pH?
Which amino acid side chain has a pKa value of 6.04 and is 4% ionized at physiological pH?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which type of bond is responsible for stabilizing tertiary structures of proteins?
Which amino acid is most commonly phosphorylated by kinases?
Which amino acid is most commonly phosphorylated by kinases?
What is the primary difference between parallel and antiparallel beta sheets?
What is the primary difference between parallel and antiparallel beta sheets?
Which of the following secondary structures is more extended and less tightly coiled compared to alpha helices?
Which of the following secondary structures is more extended and less tightly coiled compared to alpha helices?
What is the most common membrane-spanning motif for proteins?
What is the most common membrane-spanning motif for proteins?
Which of the following is NOT a common structural motif observed in proteins?
Which of the following is NOT a common structural motif observed in proteins?
Which of the following bond angles do biochemists look at within an amino acid chain?
Which of the following bond angles do biochemists look at within an amino acid chain?
Which of the following is true about protein domains?
Which of the following is true about protein domains?
What is the function of alpha helices?
What is the function of alpha helices?
Which of the following is true about the structure of amino acids?
Which of the following is true about the structure of amino acids?
Which of the following is true about the chirality of amino acids?
Which of the following is true about the chirality of amino acids?
How are amino acids typically grouped?
How are amino acids typically grouped?
What is the function of protein domains?
What is the function of protein domains?
What is the primary difference between parallel and antiparallel beta sheets?
What is the primary difference between parallel and antiparallel beta sheets?
What system is typically used to describe the chirality of amino acids?
What system is typically used to describe the chirality of amino acids?
Which of the following is true about peptide bonds?
Which of the following is true about peptide bonds?
What is the primary structure of a protein?
What is the primary structure of a protein?
Which of the following is true about the cis and trans isomers of amide bonds?
Which of the following is true about the cis and trans isomers of amide bonds?
What is the charge of zwitterions at physiological pH?
What is the charge of zwitterions at physiological pH?
What is the function of alpha helices in proteins?
What is the function of alpha helices in proteins?
What are the two bond angles that biochemists look at within an amino acid chain?
What are the two bond angles that biochemists look at within an amino acid chain?
Which of the following is true about post-translational modifications of proteins?
Which of the following is true about post-translational modifications of proteins?
Which of the following is true about glycosylation of proteins?
Which of the following is true about glycosylation of proteins?
Which of the following is true about the quaternary structure of proteins?
Which of the following is true about the quaternary structure of proteins?
Which of the following is true about proteinogenic amino acids?
Which of the following is true about proteinogenic amino acids?
Which of the following is true about the secondary structure of proteins?
Which of the following is true about the secondary structure of proteins?
Which of the following is NOT one of the three amino acids commonly phosphorylated by kinases?
Which of the following is NOT one of the three amino acids commonly phosphorylated by kinases?
