The rationale behind the drugs used to treat HIV/AIDS is to reduce the number of viruses present in the body to infect otherwise healthy cells. Which of these is NOT a therapy that acts in this way?
A. inhibition of the reverse transcriptase enzyme
B. interference with the processes involved in expression of viral nucleic acid by the host cell
C. blocking an alpha protease enzyme associated with the assembly of the virus
D. chemical agents directed at interruption of mitosis in host cells for the virus
E. blocking the attachment and fusion of the HIV viruses with T lymphocyte host cells
D
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Each testis is wrapped in a dense fibrous capsule called the
A) rete testes. B) tunica albuginea. C) septa. D) ductus deferens. E) dartos muscle.
Both intracellular proteins (such as hemoglobin) and extracellular proteins (such as plasma proteins) can act as chemical buffers.
Answer the following statement true (T) or false (F)
Why does the inferred appearance of a diaphragm in cynodonts make sense in terms of other attributes of these synapids?
What will be an ideal response?
Which of the following statements concerning potassium ions is false?
A. An increase in the extracellular potassium ion concentration leads to depolarization. B. Potassium ions are secreted into the nephron by the distal convoluted tubule. C. When aldosterone levels are high, potassium secretion is low. D. Aldosterone secretion is stimulated by high blood levels of potassium ions. E. None of these choices is false.