Question

Question 47

Which statements regarding viruses are FALSE?

Select one: 

a. Some viruses use the plasma membrane of the host to create a protective envelope p Flag question 

b. All listed statements are TRUE 

c. All viral replication undergoes both latent and lytic replication cycles. 

d. Viruses hijack host machinery for replication. 

e. Vaccines harness the host immune system to create antibodies against weakened forms of the virus. 

Question 48

The pedigree below shows a family with a rare late-onset X-linked disease that is 8 m.u. from the STR locus R5T. The STR genotype is shown below each person. What is the probability II-1 will develop the disease later in life? 

Select one: 

a. 92% 

b. 0 

c. 4% 

d. 46% 

e. 8%

Answer 1

47) viruses are the infectious agents that contains outer protein capsid and inner genetic material. Some viruses contain envelope which is derived from the host cell membranes.

Viruses undergo two phases in life cycle, they are latent phase in which viruses remain dormant and donot show any infection and Lytic phase which is the infectious phase and lysis the host cells.

Viruses hijacks host machinary by incorporating viral DNA into host DNA, thus producing proteins need by virus by using host ribosomes, polymerases, etc.

Viral Vaccines are the form of inactivated virus or viral antigen that on administration generates immunity by preproduction of antibodies, which acts against weakened viruses.

Thus all the options given in the question are true. Hence, option (b) is answer.