Who discovered that DNA was the genetic material (or "transforming principle") that could convert nonvirulent R-type Diplococcus pneumoniae bacterium to the virulent S-type?
A) Avery, MacLeod, and McCarty
B) Hershey and Chase
C) Watson, Crick, Wilkins, and Franklin
D) Erwin Chargaff
E) Frederick Griffith
Answer: A
Biology & Microbiology
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Antibodies are secreted by:
A) basophils. B) macrophages. C) plasma cells. D) T cells.
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People who have received the BCG immunization will generally have a negative tuberculin skin test.
Answer the following statement true (T) or false (F)
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Why do the veins of the legs require valves in order to function?
What will be an ideal response?
Biology & Microbiology
All the offspring of a cross between a black-eyed MendAlien and an orange-eyed MendAlien have black eyes. This means that the allele for black eyes is ________ the allele for orange eyes.
A) codominant to B) recessive to C) more aggressive than D) dominant to E) better than
Biology & Microbiology