CHEM 1005 Week 1 Practice Evaluation
Questions With Complete Solutions
Covalent catalysis is used by many enzymes to cleave peptide
bonds. Which of the following amino acids would not facilitate
this type of catalysis? (Think of the structure of the R-group of
these amino acids) correct answer: Valine
The R-group on valine does not have an active group to
participate in covalent catalysis. This most commonly
participating amino acids are cysteine, serine and histidine.
Which of the following best describes the structure of heme?
correct answer: A planar porphyrin ring that binds iron
Heme is a prosthetic group that is planar and has a bound iron
center.
Which of the following proteins is likely to have quaternary
structure? correct answer: A multimeric protein that contains
multiple peptide chains.
Primary structure is largely unfolded strand of amino acids,
while b-shets and a=helices are examples of secondary
strucutres. how these structures interact would be an example of
tertiary strucutre. Quaternary structure is a characteristic of
interactions between several individual polypeptide chains.
Questions With Complete Solutions
Covalent catalysis is used by many enzymes to cleave peptide
bonds. Which of the following amino acids would not facilitate
this type of catalysis? (Think of the structure of the R-group of
these amino acids) correct answer: Valine
The R-group on valine does not have an active group to
participate in covalent catalysis. This most commonly
participating amino acids are cysteine, serine and histidine.
Which of the following best describes the structure of heme?
correct answer: A planar porphyrin ring that binds iron
Heme is a prosthetic group that is planar and has a bound iron
center.
Which of the following proteins is likely to have quaternary
structure? correct answer: A multimeric protein that contains
multiple peptide chains.
Primary structure is largely unfolded strand of amino acids,
while b-shets and a=helices are examples of secondary
strucutres. how these structures interact would be an example of
tertiary strucutre. Quaternary structure is a characteristic of
interactions between several individual polypeptide chains.
