Question #1: (0.8 point) Which best describes a protein that is found in the cyt
ID: 55222 • Letter: Q
Question
Question #1: (0.8 point) Which best describes a protein that is found in the cytosol?
a.) Polar amino acids will be found on the surface
b.) Acidic amino acids will be found on the surface
c.) Basic amino acids will be found on the surface
d.) Non-polar amino acids will be found in the interior
e.) All of the above
Question #2: (0.8 point)
Proline destabilizes an alpha helix because the cyclic side chain makes it rigid and the alpha carboxyl group cannot participate in hydrogen bonding when it is part of a peptide bond.
a.) True
b.) False
#3: (0.8 point) What will likely happen if two glutamates at pH 5 are next to each other in a polypeptide chain? a.) The side chains of these amino acids will be uncharged and there will be no effect.
b.) The side chains of these amino acids will be charged and they will attract each other.
c.) The side chains of these amino acids will be charged and they will repel each other.
d.) Not enough information is given to determine the effect.
Question #4: (0.8 point) Consider the amino acid Isoleucine. Which of the following best describes where you predict this amino acid would be found?
a.) This amino acid is hydrophobic and would be on the surface of a protein that is exclusively in the middle of a membrane.
b.) This amino acid is hydrophilic and would be on the surface of a protein that is exclusively in the middle of a membrane.
c.) This amino acid is hydrophobic and would be in the interior of a protein that is exclusively in the middle of a membrane.
d.) This amino acid is hydrophilic and would be in the interior of a protein that is exclusively in the middle of a membrane.
e.) Not enough information is given to determine.
Question #5: (0.8 point) The difference between fetal and adult hemoglobin with regard to oxygen binding occurs because fetal hemoglobin has an amino acid substitution in one of its chains that results in a serine being replaced by a histidine.
a.) True
b.) False
Explanation / Answer
1. e- All of the above
2. a - True
3. c - The side chains of these amino acids will be charged and they will repel each other
4. a - This amino acid is hydrophobic and would be on the surface of a protein that is exclusively in the middle of the membrane
5. a - True