The difference between normal and sickle-cell
hemoglobin is based upon
a. the number of amino acids in the molecule.
b. the substitution of one amino acid for another.
c. the number and orientation of the amino acid
chains attached to the heme portion of the
molecule.
d. the number of oxygen molecules that can be
carried.
e. the type of bone marrow that produces it.
Answer: b
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Pasteurization is an example of what kind of technique?
A) antiseptic B) disinfection C) sterilization D) surgical aseptic
The coding sequence of the green fluorescent protein gene (GFP) is placed under the control of an enhancer active in neurons. When this transgene is introduced into flies, GFP will be expressed in
A) all neurons or a subset of neurons. B) all fly cells that have the transgene. C) all cells in the early embryo and then GFP will be silenced. D) all cells in the late embryo after neurons form.
In indirect fluorescent testing, fluorescent _____ are used to react with the Fc region of another, specific, serum antibody.
Fill in the blank(s) with the appropriate word(s).
The amount of guanine in an organism always equals the amount of
A.) protein. B.) thymine. C.) adenine. D.) cytosine.