Dead and injured white blood cells are removed from circulation by the
A) spleen.
B) tonsils.
C) red bone marrow.
D) kidney.
E) thymus.
A
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Which assay is the current recommended method of detection in most laboratories for influenza A and B viruses?
a. Conventional cell culture b. Enzyme immunoassays c. Reverse transcriptase polymerase chain reaction (RT-PCR) d. Shell vial culture
What is the role of the histone proteins of the chromatin?
A) They contain the instructions to build a protein. B) They act as a spool around which the DNA is wrapped. C) They help assemble ribosomes. D) They maintain the nuclear membrane.
Which of the following are considered to be frameshift mutations?
A) insertions only B) inversions only C) deletions only D) both inversion and insertions E) both deletions and insertions
For the following questions, choose the letter from the list below that best matches the description (please note the answer should be a single upper case letter):A. DesertB. SavannaC. TaigaD. Temperate grasslandE. Tropical rain forestCentral region of most continents; long, cold winters; moderate amount of rainfall; grazing mammals and burrowing rodents; fires.
Fill in the blank(s) with the appropriate word(s).