35. An infection in which the virus is continually present in the body is referr

Question

35. An infection in which the virus is continually present in the body is referred to as A. acute. B. balanced C. determinant. D. persistent. 38. Retroviruses are unique in that they A. replicate in nervous system cells. B. do not have a capsid. C. use RNA as a template to make DNA. D. use DNA as a template to make RNA 36. The receptors to which animal virus attachment proteins usually bind are A. proteins, B. carbohydrates. C. nucleic acid. D. lipids. E. glycoproteins. 39. Viroids cause disease in A. animals B. plants. C. bacteria. D. fungus. 40. Prions are A. a form of RNA virus. B. a form of DNA virus. C. a viroid. D. an infectious protein. 37. Bacteriophages and animal viruses A. both may enter a host cell by endocytosis. B. both may enter a host cell by fusion. C. both involve entry of the entire nucleocapsid. D. differ because bacteriophages leave the capsid outside the cell, while animal virus entry involves the entry of the whole nucleocapsid Extra Credit Qrs Spongiform encephalopathy occurs in A. humans. B. cattle. C. sheep. D. All of the choices are correct.

Explanation / Answer

35. Option D is correct.
Persistent infections = Infections that resist host immune system and last for a long period of time

36. Option E is correct.
Most of the animal viruses use membrane glycoproteins as their receptors.

37. Option D is correct.
Bacteriophages release only their genome into the bacterial cell.

38. Option C is correct.
Retroviruses contain RNA-dependent DNA polymerase which catalyzes the conversion of RNA to DNA.

39. Option B is correct.
Most of the viroids infect plants. (Hep-D is the only viroid caused disease in humans)

40. Option D is correct.
41. Option D is correct.

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