Thursday, 29 September 2016

VIRUS REPLICATION (28 Qs)


Viruses, the connecting link between abiotic and biotic entities have no power of reproduction except multiplying themselves in the host cell.

Now read the following questions and answers and suggest some more questions for the aspirants for competitive exams. Please help us rectify the mistakes and improve the content.




QUESTIONS & ANSWERS

1) What kind of organisms never reproduce themselves? 
A) Viruses
2) What kind of organisms need a host cell to reproduce?
A) Viruses
3) What kind of viruses multiply in the nucleus of the host cell?
A) DNA viruses
4) What kind of viruses multiply in the cytoplasm of the host cell?
A) RNA viruses
5) Who classified viruses on the basis of their replication?
A) David Baltimore
6) What are the six steps in the lytic virus cycle?
A) Attachment, penetration, uncoating, replication, assembly, and release.
7) By which process the viral particle gets attached to the host cell membrane?
A) Adsorption
8) What is the process of  injection of virus genome into host cell?
A) Penetration or Transmission
9) By which process the virus is engulfed by the host cell?
A) Endocytosis
10) What are the four kinds of genetic material in viruses?
A) Double-stranded DNA, double-stranded RNA, single-stranded DNA & single-stranded RNA
11) Which cellular process of the lost cell is under the control of lytic viruses?
A) Protein synthesis
12) What kind of RNA is transcribed due to virus infection?
A) mRNA
13) Which enzyme catalyses mRNA formation?
A) RNA translase
14) What is the process of release of virus progeny from the host?
A) Release or shedding
15) What is the last stage of a virus cycle?
A) Release or shedding
16) What is the virus cycle in which the host cell is destroyed to liberate the virus progeny?
A) Lytic cycle
17) What is the virus cycle in which the host cell is not destroyed but the virus DNA remain to replicate along with the host DNA?
A) Lysogenic cycle
18) What are the bacteriophages with lysogenic cycle?
A) Temperate phages
19) Give the name of a phage that shows lysogenic cycle in E.coli?
A) Lambda phage
20) What is the integrated state of virus genome with the bacterial genome?
A) Prophage
4) What kind of viruses multiply in the nucleus of the host cell?
A) DNA viruses
5) What kind of viruses multiply in the cytoplasm of the host cell?
A) RNA viruses
6) Who classified viruses on the basis of their replication?
A) David Baltimore
7) What are the six steps in the lytic virus cycle?
A) Attachment, penetration, uncoating, replication, assembly, and release.
8) By which process the viral particle gets attached to the host cell membrane?
A) Adsorption
9) What is the process of  injection of virus genome into host cell?
A) Penetration or Transmission
10) By which process the virus is engulfed by the host cell?
A) Endocytosis
11) What are the four kinds of genetic material in viruses?
A) Double-stranded DNA, double-stranded RNA, single-stranded DNA & single-stranded RNA
12) Which cellular process of the lost cell is under the control of lytic viruses?
A) Protein synthesis
13) What kind of RNA is transcribed due to virus infection?
A) mRNA
14) Which enzyme catalyses mRNA formation?
A) RNA translase
15) What is the process of release of virus progeny from the host?
A) Release or shedding
16) What is the last stage of a virus cycle?
A) Release or shedding
17) What is the virus cycle in which the host cell is destroyed to liberate the virus progeny?
A) Lytic cycle
18) What is the virus cycle in which the host cell is not destroyed but the virus DNA remain to replicate along with the host DNA?
A) Lysogenic cycle
19) What are the bacteriophages with lysogenic cycle?
A) Temperate phages
20) Give the name of a phage that shows lysogenic cycle in E.coli?
A) Lambda phage
21) What is the integrated state of virus genome with the bacterial genome?
A) Prophage
22) Who demonstrated virus infection agent as DNA in E.coli bacteria ?
A) Hershey and Chase
23) Which bacteriophage was used by Hershey and Chase?
A) T2 phage
24) What were the radioactive elements used by Hershey and Chase?
A) P32 & P35
25) What is the process by which  genes of one bacterium transferred to the other through a bacteriophage?
A) Transduction
26) Who first reported transduction in Salmonella typhimeurium?
A) Zinder and Lederberg
27) What is the process of permanent carrying of a phage DNA by a bacterium?
A) Lysogeny
28) What is the non-infective virus genome in the host genome?
A) Prophage

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