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)
  • DL
  • R
  • D

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?

<p>Glutamic acid gets replaced by valine in the beta chain (B)</p> Signup and view all the answers

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

<p>Alters oxygen affinity to hemoglobin (B)</p> Signup and view all the answers

What is the purpose of an apoenzyme?

<p>To require the presence of coenzymes to fully function (A)</p> Signup and view all the answers

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

<p>pKa (D)</p> Signup and view all the answers

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

<p>Glycine (A)</p> Signup and view all the answers

What is a characteristic of polar amino acids?

<p>More likely to be exposed to water than to be found in the interior of a folded protein (A)</p> Signup and view all the answers

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

<p>Zwitterion (C)</p> Signup and view all the answers

What is released during the formation of a peptide bond?

<p>Water (B)</p> Signup and view all the answers

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

<p>Isoelectric point (B)</p> Signup and view all the answers

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