12 Questions
What is the primary type of secondary structure found in hemoglobin and myoglobin?
alpha helix
What is the stereoisomerism of the chiral amino acids found in eukaryotic proteins?
L
What is the function of histidine in hemoglobin?
Buffering against acids
What causes the sickling of red blood cells in HbS?
Glutamic acid gets replaced by valine in the beta chain
What is the effect of pH on the binding of oxygen to hemoglobin?
Alters oxygen affinity to hemoglobin
What is the purpose of an apoenzyme?
To require the presence of coenzymes to fully function
What is the pH at which an equivalent distribution of acid and conjugate base exist in solution?
pKa
Which amino acid is most likely to be found in the highest concentration in collagen?
Glycine
What is a characteristic of polar amino acids?
More likely to be exposed to water than to be found in the interior of a folded protein
What is the term for a molecule that has both positive and negative areas?
Zwitterion
What is released during the formation of a peptide bond?
Water
What is the term for the pH at which a molecule is electrically neutral?
Isoelectric point
Test your knowledge of biochemistry concepts, including pKa, isoelectric points, and amino acid characteristics. Explore the properties of polar amino acids and understand the concept of zwitterions.
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