VIRUS

1.       Viruses don�t feed eat our concept of the cell. Because they

a)       lack cytoplasm          

b)       Can not multiply          

c)  Contain DNA         

d) Are small        

       e)Contain enzymes in their chlorophyl

2.       Which of the following doesn�t belong to virus?

a)       Can not pruduce enzyme                 

b)       They have no nucleus                  

       c)   They are parasitic 

d)   They have no cytoplasm                     

e)   They reproduce by sexual reproduction.

3.       Which one of the following is not done by viruses?

     I-  Influensa             II- AIDS       III- Measles          IV-Gastrits          V- Diphteria         VI-Tooth decay

a) I-II             b) II-III            c) III         d) IV-V-VI           e) IV

4-   What is the name of genetic material in viruses?

a) codon       b) mesosome     c) chromosome   d) genome

5.  Which of the following is not property of virus?

a)       they need a host cell to reproduce        

b)       they can synthesis their own energy      

c) they may undergo a mutation

d ) they have DNA or RNA             

 e)  they can not synthesis their own food.

6.       I. Ability to produce copies of themselves                     II.    having nucleic acid            

   III.having protein  

   IV.having cytoplasm

Which one of these staitments above is correct for viruses?

a) I           b) I-II         c) IV        d) I-II-III        e) II-III-IV

7.       Which of the following is false for viruses

a)       they have protein coat               

b)       they can reproduce           

c)  they have hereditary materials

d)   they have enzyme system        

 e)  they are parasitic organisms.

8.       Which of the following is present in virus ?

a) Mitochondria           b) Ribosome           c) Microtubules              d) Cytoplasm         e) Protein coat

9-  Some diseases such as influenza, the common cold and measles are not affected by antibiotics. Patients are only given medicine to lower their bodt temparature. What is the reason for this ?

   a)The virus is very strong           

   b)Viruses don�t have theit own enzyme system      

   c) Viruses are exposed to mutation

   d) Viruses reproduce rapidly at higher temparatures                 e) Viruses protect themselves by a protein coat

10-  Which of the following is not found in the structure of bacteriophage ?

a) Protein coat   b) DNA      c) Tail     d) Cell membrane

11- Which is not a property of viruses ?

a)They are parasitic  

b)They don�t have nucleus

 c)They can not reproduce in host cell

 d)They can not be seen with light microscope

12- Which of the following diseases is not caused by viruses ?

a) Common cold    b) AIDS    c) Influenza     d) Typhoid

13-  Which of the following is not found in the structure of bacteriophage ?

a) Deoxyribose           b) Uracil             c) Aminoacid           d) Adenine          e) Phosphate

14- Which of the following isn�t in the structure of a virus?

a. genetic material        

b. protein coat       

 c. DNA or RNA           

d. nucleus

15-Against which of the following viruses, can people not be immunized?

A)      Warts          B)  Measles           C) Mumps

D)      The common cold      E)  Influenza

16-The genetic/information of a virus is contained

a) in its protein coat        b) in its nuclei

c) in either its RNA or DNA 

 d) In their host's cells and is activated once the vims enters

17-Viruses

A.      are smaller than the smallest cells

B.      are made up of a cell membrane, cytoplasm and nucleus

C.      are cells

D.      are autotrophs

E.      all of the above