The major advantage of immunofluorescent microscopy assays is that:
a. extensive training is not necessary.
b. it serves as an excellent way to preserve the reaction for referral and archiving.
c. visual assessment of the adequacy of a specimen is possible.
d. fluorescent microscopes are easily ac-cessible to most laboratories.
C
Because the viewing microscopist can observe the cells of the specimen, a major advantage of immunofluorescent microscopy assays is that an assessment of the adequacy of a specimen is possible.
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DNA replication is bidirectional in prokaryotes with circular chromosomes
Indicate whether the statement is true or false.
Most cells have a negative plasma membrane potential (Vm) because they have
A) equal concentrations of ions on both sides of the membrane. B) an excess of negatively charged solute molecules inside the cell. C) an excess of positively charged solute molecules inside the cell. D) an excess of negatively charged solute molecules outside the cell. E) an excess of water molecules inside the cell.
The sex chromosomes determine the sex of mammals and are
A. female, YX; male, XX. B. female, Y; male, X. C. female, X; male, XX. D. female, XX; male, XY.
In conifers, meiosis of diploid cells in an ovule produces ____.
A. microspores B. pollen sacs C. pollination droplets D. pollen grains E. megaspores