Each cone responds primarily to a single color. What kinds of cones do normal humans have?
a. Three cones that perceive red, blue, and yellow light.
b. Three cones that perceive red, blue, and green light.
c. Three cones that perceive orange, green, and purple light.
d. Four cones that perceive red, blue, yellow, and green light.
e. All cones respond equally to all colors of the visible light spectrum.
B
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Most vertebrates maintain homeostasis in regard to the total solute concentrations of their extracellular fluids and the concentrations of specific inorganic ions. The kidneys participate in regulating the extracellular fluid concentration of all ions below EXCEPT
A. Ca2+ ions. B. K+ ions. C. Cl- ions. D. Na+ ions. E. Fe2+ ions.
Which of the following is an example of a reporter gene?
A) The linkers that are attached to RNA molecules to perform RNA-Seq B) The lacZ coding sequence under the control of a prokaryotic promoter C) The DNase I enzyme used to digest DNA for a footprint assay D) A human protein expressed under the control of a prokaryotic promoter
If a child more strongly resembles one parent's physical traits than the other parent's, the explanation could be due to
chromosome movements during a. anaphase II. b. metaphase II. c. prophase II. d. anaphase I. e. telophase I.
Alternate forms of the same gene
A. do not exist. B. are alleles. C. are homologs. D. are sister chromatids. E. do not occur in the same individual.