Question

Question 65 (1 point) When certain viruses, such as herpes viruses, invade cells and then reside in the nucleus without causing immediate any damage , this condition is called _______ . Question 65 options: A) acute B) recurrence C) persitence D) latency E) non-acute

Question 66 (1 point) Non-permissive cells lack proper receptors. Question 66 options: True False

Question 67 (1 point) Virus vaccines are always cultured in embryonated chicken eggs. Question 67 options: A) True B) False

Question 68 (1 point) An infectious virus particle differs from a viroid in that a viropid is just a naked infectious protein. Question 68 options: A) True B) False Question 69 (1 point) Comparatively speaking negative strand DNA viruses are more sensitive to the inhibition by interferon than positive strand DNA viruses.

Answer 1

Answer 65: Latency

The virus can stay dormant in the host cell. Viruses in the latent stage are immune to body defenses since the host body's antibodies cannot reach them.

Answer 66: True

Non-permissive cells are one that does not allow the multiplication of viruses.

Answer 67: False

Many different cell strains are used in the development of vaccines. Some vaccines such as the rotavirus vaccine, polio vaccines are cultured using Vero cell lines.

The Vero cells are isolated from kidney epithelial cells extracted from an African green monkey.

Live attenuated Vaccines culture typically uses chick embryos.

Cell-based vaccines are developed from mammalian cell lines rather than the embryonic chicken eggs.

Answer 68: True.

Viroids are a tiny fragment of nucleic acid (RNA) commonly associated with plant disease. They lack the capsid or other envelope.