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Biochemistry: Acids, Amino Acids, and Proteins

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Biochemistry: Acids, Amino Acids, and Proteins

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Questions and Answers

What is the primary type of secondary structure found in hemoglobin and myoglobin?

random coil

alpha helix (correct)

beta sheet

gamma turn

What is the stereoisomerism of the chiral amino acids found in eukaryotic proteins?

L (correct)

What is the function of histidine in hemoglobin?

Transporting oxygen

Buffering against bases

Buffering against acids (correct)

Storing oxygen

What causes the sickling of red blood cells in HbS?

Glutamic acid gets replaced by valine in the beta chain Signup and view all the answers

What is the effect of pH on the binding of oxygen to hemoglobin?

Alters oxygen affinity to hemoglobin Signup and view all the answers

What is the purpose of an apoenzyme?

To require the presence of coenzymes to fully function Signup and view all the answers

What is the pH at which an equivalent distribution of acid and conjugate base exist in solution?

pKa Signup and view all the answers

Which amino acid is most likely to be found in the highest concentration in collagen?

Glycine Signup and view all the answers

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 Signup and view all the answers

What is the term for a molecule that has both positive and negative areas?

Zwitterion Signup and view all the answers

What is released during the formation of a peptide bond?

Water Signup and view all the answers

What is the term for the pH at which a molecule is electrically neutral?

Isoelectric point Signup and view all the answers