L-27,28 :Classifications and general properties / lab diagnosis of viruses

Question 1

do all viruses have a lipoprotein membrane ?

Answer 1

no

Question 2

what’s the outer coat of the virus called and what’s it made of?

Answer 2

capsid -> made of capsomers

Question 3

what determines the shape and structure of viruses?

Answer 3

arrangement of capsomeres

Question 4

the caspid + nucleic acid genome together are known as:

Answer 4

nucleocaspid

Question 5

entire viral unit in its extra-cellular form is known as :

Answer 5

virion

Question 6

a sphere shaped virus is known as:

Answer 6

icosahedral

Question 7

a rod shaped virus’ structure is labelled as :

Answer 7

helical structure

Question 8

DNA viruses:

Answer 8

herpes virus
epstein barr virus
cytomegalovirus
hepatitis B virus
varcicella zoster virus

Question 9

alpha . beta , and gamma interferon releaser is an example of which type of immune response ?

Answer 9

non-specific immune response

Question 10

what can light microscopy reveal ?

Answer 10

inclusion bodies formed by aggregates of many virus particles such as negri bodies by rabies virus and multinucleated giant cells in herpes

Question 11

cylopathic effect :

Answer 11

change in appearance of infected cells

Question 12

what is antibody titre ?

Answer 12

highest dilution of serum that gives a positive reaction in the test (10-14 days after disease) 4X