The fungus Pneumocystis carinii is of significance to AIDS patients because:
A. It is transmitted sexually and is the cause of AIDS.
B. It attacks T-cells in the same way as does AIDS and thereby increases the severity of the disease.
C. It attacks the AIDS pathogen and thereby reduces the severity of the disease.
D. It infects individuals whose immune system has been weakened by AIDS and causes pneumonia.
E. none of the other choices provided
D. It infects individuals whose immune system has been weakened by AIDS and causes pneumonia.
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Hydrogen, atomic number 1, has 3 isotopes, 1H, 2H, 3H. 1H is comprised of one proton, one neutron and one electron
Indicate whether the statement is true or false.
Who is credited with demonstrating unidirectional and nonreciprocal transfer of DNA between two mating E. coli cells?
A. Tatum B. Lederberg C. Hayes D. None of the choices are correct.
With respect to the outer and inner faces of the lipid bilayer of the cell membrane, the composition of lipids is
What will be an ideal response?