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Exam practice

Terms in this set (41)

Which molecular patterns are common to both bacteria and humans
info flow from proteins to DNA
similar biomolecular composition]
genetic info flow
using ATP as energy currency
Development of tissues
genetic info flow
similar biomolecular composition
using ATP as energy currency
Which amino acid in hemoglobin is involved in coordinating iron in addition to the heme prosthetic group
histidine
True/False
Cysteine is the only amino acid with sulfur in the R group
false
Which of the following is not correct concerning myoglobin
a. the function of myoglobin is oxygen storage in muscle
b. the globin chain contains an extensive alpha-helical structure
c. the heme group is bound to the globin chain by two disulfide bonds to cysteine residues
d. the iron of the heme group is in the fe2+ oxidation state
c. the heme group is bound to the globin chain by two disulfide bonds to cysteine residues
Which of the following peptides will have a net charge 0 at neutral pH
Gly-Arg-Tyr
Ala-Ala-Ala
Arg-Ala-Arg
Ala-Glu-Glu
Pro-Lys-Lys
Ala-Ala-Ala
Draw a representation of a hydrogen bond
Central dogma, draw and label
Which is correct concerning the differences between hemoglobin and myoglobin
a. myoglobin is a dimer, hemoglobin is a tetramer
b. hemoglobin has a higher degree of O2 saturation at all physiologically relevant partial pressures of O2 than does myoglobin
c. Hemoglobin exhibits a hyperbolic O2 saturation curve while myoglobin exhibits a sigmoid shaped curve
d. Hemoglobin exhibits cooperative binding of O2 while myoglobin does not
d. Hemoglobin exhibits cooperative binding of O2 while myoglobin does not
most abundant metals in the human body
Na, K, Ca
How does a saturation curve shift with a decrease in CO2
To the left
Highest level of protein structure in human insulin
quaternary
What is the isoelectric point
the pH at which a solute has no net electric charge and does not move in an electric field
Why myoglobin does not exhibit cooperativity
It only has one subunit
The structure of normal adult hemoglobin can be described as
a tetramer composed of two alpha-beta dimers
An amino acid in a medium with a pH below its isoelectric point would have
a net positive charge
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