Author: Joyce Buda


Proteins Quiz
Question 1
Points: 10 out of 10
This amino acid is ______________.
Question 2
Points: 10 out of 10
Where do peptide bonds form?
Between adjacent carboxyl groups on amino acids.
Between amino acids of two different protein chains.
Between the carboxyl group of one amino acid and the amino group of another amino acid.
Between adjacent amino groups on amino acids.
Question 3
Points: 10 out of 10
Which of the following is the correct result after adding the amino acid serine to a dipeptide made of two alanine residues?
Question 4
Points: 10 out of 10
The following shows the dipeptide alanine-serine. Four atoms are labeled. Which atom is part of the peptide bond that joins the two amino acids?
Atom A
Atom B
Atom C
Atom D
Question 5
Points: 10 out of 10
Which of the following changes when a protein denatures?
Length of the entire protein
Amino acid sequence
Three dimensional structure
Question 6
Points: 10 out of 10
The peptide bond that forms between two amino acids is an example of a(n):
hydrogen bond
covalent bond
ionic bond
Question 7
Points: 10 out of 10
Which of the following curves best represents the activity of an enzyme isolated from a bacteria that lives in the hot springs in Yellowstone (water temperature 120 degrees C)?
curve A
curve B
curve C
Question 8
Points: 10 out of 10
Which of the following four proteins would bind best to the antibody? The portion of the antibody the binds the protein is shown on the left, the proteins (A, B, C, D) on the right.
Protein A
Protein B
Protein C
Protein D
Question 9
Points: 10 out of 10
Which of the following plots more correctly shows the activity of pepsin as a function of pH?
plot A
plot B
plot C
plot D
Question 10
Points: 10 out of 10
An enzyme binds the indicated substrate and converts it to product by removing two hydrogen atoms and forming a double bond between the two middle carbons. Compounds A and B are inhibitors of this enzyme. Which of the two inhibitors is a non-competitive inhibitor?
Compound A
Compound B

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