The HIV virus specifically binds to and infects which of the following cells to

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The HIV virus specifically binds to and infects which of the following cells to cause an HIV positive state? a. CD 4 T cells and dendritic cells b. CD 8 T cells c. c. B cells and macrophages d. NK cells and dendritic cells e. mast cells HIV infection involves the binding of the viral gp 120 to which of the following on the target cell a. gp 41 b. MHC class I c. CD4 d. Chemokine receptor CCRS e. Answers b and c are correct What is the source of the HIV envelope that surrounds the virus? a. the HIV genome lack genes for the envelop so it is obtained from the host plasma membrane as it exits the cell b. HIV genome has genes for the envelope that is synthesized during viral replication c. HIV env gene product, gp 160 protein that is formed in the plasma membrane of the infected cell which will become the viral envelope d. HIV envelope is changed rapidly due to hypermutation of HIV env genes for the phospholipids bilayer e. All of the above answer choices are correct Which of the following is the cause of the high mutation rate in retroviruses such as HIV? a. Host cell RNA ploymerase used to transcribe the HIV genes lack fidelity with the viral promoters and introduces mutations in the HIV mRNA b. HIV reverse transcriptase lacks the proofreading mechanism associated with cellular DNA Polymerase replication of DNA. c. they don't have a good cell composition so their synthesis makes mutational mistakes d. the genetic code of RNA viruses is different from the code in cellular DNA so all HIV will be recognized as mutants e. Both answer choices c and d are causes What is the function of AZT (zidovudine is an analog of deoxy-ribonucleotides types of drugs given in the current treatment for HIV infection? a. AZT inhibit the action of HIV protease to block HIV replication of new virus in the infected cells. b. AZT nucleosides block reverse transcriptase replication of HIV RNA into DNA because block the start of new HIV infections but does not block on going viral replication in HIV infected cells blocks c. AZT type drugs going viral replication in infected cells d. AZT induce mutations into the HIV genome to evolve new types of viruses e. Both answer choices a and c are correct. What is the function of protease inhibitors used to treat HIV AIDS? a. it blocks new the start of new HIV infections of human cells b. it blocks HIV replication in infected cells containing HIV proviruses. c. it blocks on going HIV replication by inhibiting the HIV protease from cleaving the long gag and pol polypeptide chains into functional HIV core proteins and enzymes e. Both answers choices b and c are correct. Influenza virus strains that cause pandemics are usually pathogens in which of the following? a. Birds (avian flu virus) or Pigs (swine flu virus) and Humans (human influenza virus) b. Humans (human influenza virus) only c. Humans, Apes and monkeys d. Bacteria and Humans e. Insect and humans.

Explanation / Answer

ans 105 a)the hiv virus specially binds to and infects cells to cause an hiv positive state CD4 T cell and dendritic cells .

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