Question

Question 37 (1 point) An infectious virus particle differs from a viroid in that a viropid is just a naked infectious RNA. Question 37 options: A) True B) False

Question 38 (1 point) Resistant cells have proper receptors, but the cytoplasm is not able to support the full virus replication. Question 38 options: True False

Question 39 (1 point) Choose which purified DNA will lead to a productive infection in a transfection experiment. Question 39 options: A) single stranded DNA from papovavirus. B) single stranded DNA from parvovirus. C) single stranded DNA from picornavirus D) single stranded DNA from poxvirus E) single stranded DNA from herpes virus type 2

Question 40 (1 point) Retroviruses Question 40 options: A) possess DNA in their capsids. B) dependent on cellular reverse transcriptase. C) require a DNA-dependent DNA polymerase. D) possess a reverse transcriptase in their core. E) can convert malignant cells back imto normal cells.

Answer 1

Q37) True, viroid is a naked RNA molecule without any protein coat and may cause diseases in plants like Potato spindle Tuber disease.

38) True, this may be due to some alternative pathway or such pathway with Do not allow assembly of virus or ubiquitinisation or destruction of the viral particals etc.

39) E) herpes virus type 2 , they show lysogenic and in few cases lytic cycles also. They attack humans and cause sexually transmitted diseases.

40) D) possess reverse transcriptase in their core. As the RNA enters the cell it is reverse transcribed to dna and infection is done.