Frederick Griffith discovered
A. transformation.
B. transposons.
C. the lac operon.
D. DNA.
E. conjugation.
Answer: A
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At present, the most accurate indicator of evolutionary relatedness among organisms is the
A. size of the periplasmic space. B. sequence of the ribosomal small subunit RNA. C. size of the bacterial chromosome. D. similarities of cell membrane proteins. E. size of the ribosomes.
Hydrogen bonds between different parts of the polypeptide chain result in which level of protein structure?
A. primary B. secondary C. tertiary D. quaternary
The notion that organisms have hierarchical levels of structure refers to their
What is the cause of hemolytic disease of the newborn?
A. The mother has eosinophilia during pregnancy. B. An O blood type mother produces anti-A antibodies which cross the placenta and react with the baby's A antigens. C. Antibodies of an A or B blood type mother cross the placenta and react with baby's O antigens. D. The mother produces anti-Rh antibodies which cross the placenta and react with baby's Rh antigens. E. The mother's mast cells degranulate in the placenta, damaging it.