[ مختبرات ] : مادة الفيروسات

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Virolog
y

1- Viruses can be classified to DNA and RNA viruses according to their …………..
a- Morphology.
b- Physical properties.
c- Biological properties.
d- Genome.

2- The affinity of certain virus to certain tissue is referred as to …………………….
a- Attraction.
b- Tropism.
c- Specialty.
d- None of the above.

3- Asymptomatic viral infections are known as ……………….
a- Latent infection.
b- Chronic infection.
c- Acute infection.
d- None of the above.

4- …………… is the yield (numbers) of new viruses from a viral infected cell.
a- Productivity.
b- Infectivity.
c- Burst size.
d- Release size.

5- During viral replication cycle the step of macromolecular synthesis includes ……..
a- Synthesis of regulatory enzymes.
b- Viral genome replication.
c- Synthesis of structural proteins.
d- All the above.

6- During viral replication cycle the release of naked viruses takes place through ………….
a- Cell lysis.
b- Budding.
c- Translocation.
d- Fusion.

7- The first step of viral replication cycle is ……………….
a- Release.
b- Maturation.
c- Recognition.
d- Penetration.

8- …………. take place when the initial site of viral infection is the main site of viral replication.
a- Systemic infection.
b- Localized infection.
c- Central infection.
d- Partial infection.

9- Incubation period of viral localized infection is ………. than (to) its of systemic one.
a- Longer.
b- Shorter.
c- Similar.
d- Slightly longer.
10- Viral latent infection usually takes place in ……………..
a- Actively dividing cells.
b- Non-dividing cells.
c- Neurons.
d- B and C.

11- During viral replication cycle there is (are) ………… translation process(es).
a- 1.
b- 2.
c- 3.
d- 4.

12- According to viral genomes the abbreviation ssRNA is stands for ………………
a- Straight Strip of Replicated Nucleic Acid.
b- Short Strand of Ribonucleic Acid.
c- Single Strand of Ribonucleic Acid.
d- Safe Strip of Replicated Nucleic acid.

13- Viral particles without envelope are known as …………………
a- Covered viruses.
b- Naked Viruses.
c- Coated Viruses.
d- Embedded Viruses.

14- Viral target cell is known as ………………
a- Parent cell.
b- Host cell.
c- Accepted cell.
d- Incubating cell.

15- Baltimore system classified viruses into ……………… groups.
a- 5.
b- 6.
c- 7.
d- 12.

16. Gene expresion means :
a. information flow from gene to protein
b. polymer of RNA
c. agremation of proten
d. substution of gene

17. Virus pathogenesis is :
a. ability of virus to produce a disease
b. virus replication
c. virus metabolic
d. virus shape

18. Molcular identification include
a. polymerase chain reaction ( PCR )
b. DNA polymerase
c. DNA fingerprinting
d. all above true




19. Indirect diagnosis of virus include
a. Enzyme immuno assay (ELISA )
b. shadow technique astaining
c. Microscopically
d. no correct answer

20. The names of viruses may reflect the follwing
a. size
b. place of discover
c. disease cause
d. all above true

21. General character of viruses is
a. contain only DNA or RNA
b. contain a nuclei
c. see with nicked eye
d. contain flagella

22. Detection of viruses size can be by the follwing methods
a. electronic microscopy
b. ultra-filtration
c. Gram stain
d. A and B are true

23. RNA viruses are …
a. single strand
b. double strand
c. triple strand
d. no correct answer.

24. Functions of viruses nucleic acid are..
a. carries the genetic information
b. control all the virus characters
c. carries the genetic codes for proteins
d. all above true.

25. The viruses mode of transmission ..
a. injection
b. Inhalation
c. by mosquito
d. a & b are true.

26. Factor which control virus pathogenesis are
a. virus virulence virus factor
b. virus M.W
c. metabolic and nutrational status
d. A and C are true

27. These are different uses of DNA probe except
a. diagnostic of infections disease
b. use use in differentiall diagnosis
c. classification factor
d. used for expharation of genetic structure




28. In PCR ……………specific primers must be used:
a. Two.
b. Three.
c. Four.
d. Non of the above.

29. All the followings are post amplification (Detection) methods except:
a. Dot Blot Hybridization.
b. Agar gel electrophoresis.
c. ELIZA.
d. Southern Blot Hybridization.

30. Primers typically consist of:
a. 10-20 bases.
b. 20-30 bases.
c. 50-70 bases.
d. 100-200 bases.

Virology QUEZ
1. Virology concerned with :
a- microbiology
b- genetics
c- human biology
d- virus

2. Viruses are:
a- monomorphic.
b- dimorphic.
c- pleomorphic.
d- all of the above.

3. Viruses are obligate:
a- intracellular parasites
b- extracellular parasites
c- a+b
d- none of the above

4. Viral capsid is formed of :
a- Protein.
b- glycogen.
c- lipoprotein bilayer.
d- glycoprotein.

5. Viruses which infect bacteria is called :
a- bacteriophage
b- bacterioside
c- A & B is false
d- non of the above

6. A naked virus is:
a- a virus without envelope
b- a virus without capsid
c- a virus without RNA
d- a virus without DNA

7. Viral envelope :
a- Some viruses have envelopes.
b- All viruses have envelopes.
c- All viruses have no envelops.
d- non of the above.

8. Incomplete virus is :
a- deficient virus
b- able to infect & replicate
c- virus to stimulate the immune system
d- virus with nucleic acid

9. The genetic information of virus is contained in:
a- The envelope
b- The prion
c- The capsid
d- The nucleic acid


10. Which of the following viruses could be seen by the light microscope:
a- Herpes virus
b- Pox virus
c- Influenza virus
d- Rota virus

11. Characterization of virus is :
a- obligatory intra cellular
b- virus are very small
c- contain only DNA or RNA
d- all of the above

12. Viruses can infect :
a- Human.
b- Animals.
c- plants.
d- all of the above.

13. All the following virus are transmitted by injection except:
a- HIV
b- HBV
c- HCV
d- Influenza virus

14. The transformation of virus infected cells into tumor cells is considered:
a- Acute infection
b- Chronic infection
c- Chronic infection with neoplasm
d- Latent infection

15. Which technique is used in staining of viruses?
a- Shadow casting technique
b- negative staining technique
c- positive staining technique
d- all of the above

16. All DNA viruses multiply intra-nucleus except:
a- parvovirus
b- adenovirus
c- herpesvirus
d- poxvirus

17. The structural unit of nucleic acid is:
a- nucleotide
b- nucleoside
c- amino acid
d- non of the above

18. Nucleocapsid are:
a- nucleo protein
b- DNA protein
c- RNA protein
d- non of the above



19. ……………………..is the ability of the virus to produce a disease
a- infectivity
b- pathogenicity
c- convalescence
d- non of the above

20. RNA virus are:
a- double strand RNA
b- multi plying intra cytoplasm
c- non of the above
d- all of the above

21. All RNA viruses multiply intra-cytoplasm EXEPT ……………….
a- Picornavirus.
b- Reovirus.
c- Togavirus.
d- Retrovirus.

22. Virus envelope is …………….
a- an outer most polysaccharide shell.
b- Lipoprotein bi-layer surrounds some viruses.
c- Found in all viruses.
d- None of the above.

23. Viral enzymes are …………………….
a- Metabolic ones.
b- Essential for viral replication.
c- Essential for viral attachment.
d- B & C.

24. How many types of viral enzymes ?
a- 1.
b- 2.
c- 3.
d- 4.

25. ……………. Are the structural unites of capsid.
a- Protomers.
b- Monomers.
c- Glycogen.
d- None of the above.

26. Prions are ……………………..
a- Virus like particles.
b- Infectious protein particles.
c- Have a small integrated N A molecule.
d- All the above.

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