Question

Please only answer no need to explain. Thank you

_____20. All of the following are caused by rickettsia except

                 A. Rocky Mountain spotted fever                   B. sleeping sickness

                 C. epidemic typhus                                         D. endemic murine typhus

_____21. All of the following are herpes viruses or are caused by herpes viruses except

                 A. kuru      B. Burkitt’s lymphoma      C. infectious mononucleosis     D. cytomegalovirus

_____22. The tiger mosquito

                 A. is Aedes aegypti     B. better adapted to cooler climates than other mosquitoes

                 C. is active only in the evening                D. only transmits breakbone fever

_____23. Gangrene, botulism and tetanus have the following in common

                 A. are caused by gram positive sporeforming anaerobic rods

                 B. are caused by Clostridium perfringens

                 C. produce neurotoxins that induce paralysis

                 D. antibiotics and vaccines are effective for combating the diseases

_____24. The Sabin vaccine against polio

                 A. requires booster injections every few years     B. is a trivalent living attenuated virus

                 C. is a formalin-inactivated virus                         D. was first vaccine used against polio

_____25. Most human cases of rabies in the U.S. are caused by _________ bites and most cases

                 worldwide are caused by _____________ bites.  

                 A. bat; dog             B. dog; dog           C. raccoon; dog            D. rat; bat

_____26. Which one of the following is associated with the host cell during infections with HIV?

                  A. gp120               B. gp41              C. CCR5 coreceptor              D. CD8⁺ receptor

_____27. After HIV invades a cell and integrates into the host DNA all of the following can

                 occur except

                 A. provirus can remain latent       

                 B. provirus can control production of virions and remain latent in the cell

                 C. provirus can produce virions that bud off from the cell to infect other cells

                 D. provirus segregates from the host DNA and produces virions that lyse the cell     

              

_____28. All of the following make HIV/AIDS an extremely difficult disease to cure except

                 A. it is an enveloped RNA virus

                 B. it is a virus that undergoes rapid antigenic variation due to high mutation rate

                 C. it is a virus that remains in a latent state and is able infect through cell to cell fusion

                 D. there are numerous subtypes of HIV that infect a population   

_____29. TORCH is an acronym that represents a series of prenatal serological tests on the

                 pregnant mother. All of the following are diseases that are screened for except

                 A. toxoplasmosis         B. syphilis        C. rubella        D. ophthalmia neonatorum           

          

Answer 1

20. Sleeping sickness is not caused by Ricketetsia. Hence, the correct answer is option 'b'.

21 Kuru is a prion sickness and not cause by the Herpes virus. Hence, the correct answer is option 'a'.

22. The tiger mosquito is better adapted to the cooler climates than other osquitoes. Hence, the correct answer is option 'b'.

23. Gangrene, Botulism, and tetanus are all caused by gram-positive spore forming anaerobic rods. Hence, the correct answer is option 'a'.

24. The Sabin vaccine against polio is a trivalent attenuated vaccine. Hence, the correct answer is option 'b'.

25. The correct answer is bat:dog. Hence, the correct answer is option 'a'.

26. The CCR5 coreceptor is associated with the HIV infection in host cells. Hence, the correct answer is option 'c'.

27. The correct answer is option 'b'.

28. The correct answer is option 'a'.

29. The correct answer is option 'd'.