If you were to use antibodies that were chemically bonded to a stain in order to visualize the expression pattern of a protein in a fixed tissue, what experimental techniques and equipment would be applicable?
A. DAPI or Hoechst stains, fluorescence microscopy
B. immunohistochemistry, bright-field microscopy
C. antibody interference assay, bright-field microscopy
D. immunohistochemistry, dark-field microscopy
Answer: B
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Genetic variation associated with meiosis is manifested as
a. new combinations of alleles due to crossing over. b. random movement of homologous pairs of chromosomes moving to spindle poles. c. random chance playing a role when a sperm fertilizes an egg. d. diploid cells expressing various traits. e. a, b, and c.
The long, cylindrical, contractile portions of a muscle fiber, which are composed of even smaller myofilaments, are called ___________________
a. myofibrils
b. sarcolemmas
c. myofilaments
d. sarcomeres
Which of the following is true regarding hemoglobin?
A. It is a lipid. B. It contains iron. C. It transports oxygen in the blood. D. It is present in all vertebrates and invertebrates. E. It is identical to hemocyanin.
In performing a Gram's staining techniques, the counterstain is
A. Methylene blue B. Crystal violet C. Safranin D. Malachite green E. Gram's iodine