BACTERIA AND VIRUS TEST 2 CLASS XI

TEST TWO –BACTERIA +VIRUS

1.The viral nucleocapsid is the combination of

A.            genome and capsid

B.            capsid and spikes

C.            envelope and capsid

D.            capsomere and genome

2. The oncogene theory refers to

A.            how chemicals inactivate viruses when applied

B.            how viruses replicate in host cells

C.            how viruses transform normal cells into tumor cells

D.            none of these

3.  Which of the following may affect proteins and nucleic acids, but not viruses?

A.            Denaturation

B.            Enzyme treatment

C.            Pressure

D.            All of these

4. The gram-positive bacteria lack __________ structure/component?

A.            outer membrane

B.            murein

C.            teichoic acid

D.            plasma membrane

5.            Bacteria are

A.            saprophytic

B.            symbiotic

C.            hyper parasitic

D.            all of these

5. The motile bacteria are able to move by

A.   Fimbriae B flagella C cilia D Pili

Q6 WRITE THE DIFFERENCE BETWEEN PLASMID AND EPISOME  1

Q7 WHAT IS THE PRODUCT OF F+ X HFr-.1

Q8 Draw TMV and bacteriophage.3

Q9 chemoautotrophic nutrition is essential in some bacteria. Justify the statement with example.3

Q10 if u are provided  bacterial colonies and asked to classify in to gram + and gram – bacteria then what procedure would  u applied to get it..3