The interaction of several polypeptide chains
in a hemoglobin molecule is its ____ structure.
a. primary
b. secondary
c. tertiary
d. quaternary
e. combined
D
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A colleague gives you two membrane fractions from a plant cell lysate. One contains the plasma membrane fraction, the other the mitochondrial fraction. The tubes are not labeled, but you run the samples anyway, looking at the macromolecule composition of the samples. You know for certain that the second sample contains the mitochondrial fraction simply because it contains insignificant amounts of
A) lipids. B) protein. C) specifically phospholipids. D) carbohydrates. E) both choices C and D
Explain how a diving marine mammal increases its supply of stored O2, in spite of the fact that its lungs are
collapsed at depths below 25 meters.
What will be an ideal response?The term metastasis refers to the fact that cancer cells tend to ________.
Fill in the blank(s) with the appropriate word(s).
________ are blocks of mesoderm that eventually form skeletal muscles of the neck and trunk, connective tissue, and vertebrae
Fill in the blank(s) with correct word