Animal Viruses

Q. HIV is comprised of a protein coat and genetic material which is

1. single stranded DNA
2. single stranded RNA
3. double stranded RNA
4. double stranded DNA

Q. What is the genetic material in influenza virus?

1. double helical DNA
2. RNA
3. single helix DNA
4. none of these

Q. Which of the following is correct regarding HIV?

I.HIV is a retrovirus with double stranded RNA.
II.HIV is a retrovirus that contains single stranded RNA.
III.HIV is a non-enveloped retrovirus with double stranded stranded RNA molecules.
IV.HIV causes severe immunodeficiency in the due course of its infection.

1. 
   I and III only
   
2. II and IV only
3. I, II and III
4. II, III and IV

Q. Reovirus has

1. ds DNA
2. ds RNA
3. ss RNA
4. ss DNA

Q.

Read the following statements regarding HIV.

I. It is an exception to the central dogma of molecular biology.
II. It is a type of retrovirus.
III. It consists of double-stranded DNA.
IV. It consists of a protein coat.

How many of the above statements are incorrect?

1. 3
2. 1
3. 2
4. 4

Q. Which of the following statement is not true for retrovirus?

1. DNA is not present any stage in the life cycle of retroviruses
2. Retroviruses carry gene for RNA dependent DNA polymerase
3. The genetic material in mature retroviruses is RNA
4. Retroviruses are causative agents for certain kinds of cancer in man

Q. Plant viruses have _____ and animal viruses are _____.

1. DNA and Tadpole shaped

2. RNA and Polyhedral shaped

3. RNA and DNA and Rod shaped

4. RNA or DNA and Varied in shape

Q. Name a plant virus with RNA as their genetic material.

Q. AIDS can be detected by

1. RT-PCR
2. ELISA
3. Western blot test
4. All of these

Q. Single stranded RNA plant viruses are

1. Turnip yellow mosaic virus
2. Potyvirus
3. Alfalfa mosaic virus
4. All of the above

Q.

dsRNA is found in

1. Retrovirus

2. TMV

3. phiX174

4. None of these

Q. Assertion: A person suffering from AIDS gets infected with opportunistic infections.
Reason: HIV contains a reverse transcriptase enzyme.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
   
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.

Q.

dsRNA is found in

1. Retrovirus

2. None of these

3. TMV

4. ϕ× 174

Q. The genetic material of papaya mosaic virus is

1. ssDNA
2. dsRNA
3. dsDNA
4. ssRNA

Q.

rn

Name any three viruses which have RNA as the genetic material.

rn

Q. In some viruses, RNA is present instead of DNA indicating that

1. Their nucleic acid must combine with host DNA before replication
2. They cannot replicate
3. There is no hereditary information
4. RNA can act to transfer heredity

Q. Genomic nucleic acid is fragmented in

1. $TMV$
2. Influenza virus
3. $HIV$
4. Poliomyelitis virus

Q. Which of the following is correct regarding HIV?

I.HIV is a retrovirus with double stranded RNA.
II.HIV is a retrovirus that contains single stranded RNA.
III.HIV is a non-enveloped retrovirus with double stranded stranded RNA molecules.
IV.HIV causes severe immunodeficiency in the due course of its infection.

Q. Explain how to find whether an E.coli bacterium has transformed or not when a recombinant DNA bearing ampicillin resistant gene is transferred into it.

Q. HIV is a retrovirus because its genetic information is carried in

1. DNA instead of RNA
2. DNA
3. Protein coat
4. RNA instead of DNA

Q. Which of these viruses have a $ssRNA$?

1. $\varphi \times 174$
2. $T_2$ bacteriophage
3. Pox virus
4. $TMV$

Q. Pathogen of which disease is best detected by PCR?

Q. _______ and ______ have the ability to transform normal cells into cancerous cells.

Q. Assertion: A person suffering from AIDS gets infected with opportunistic infections.
Reason: HIV contains a reverse transcriptase enzyme.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
   
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Both assertion and reason are false.

Q. Smallest part of DNA that can undergo recombination is

1. Muton
2. Cistron
3. Replicon
4. Recon

Q. Plant viruses have _____ and animal viruses are _____.

1. DNA; Tadpole-shaped
2. RNA; Polyhedral-shaped
3. RNA or DNA; Varied in shape
4. RNA and DNA; Rod-shaped

Q. Which statement is incorrect?

1. T₄ contains dsDNA
2. TMV contains dsRNA
3. Plant virus contains RNA
4. Animal virus contains DNA

Q. The correct sequence of making a cell competent is

1. Treatment with divalent cations, incubation of cells with recombinant DNA on ice, heat shock (${42}^0$C) again placing on ice.
2. Heat shock (${42}^0$C), incubation of cells with recombinant DNA on ice treatment with divalent cations placing on ice.
3. Treatment with divalent cations, placing on ice incubation of cells with recombinant DNA on ice heat shock (${42}^0$C).
4. Incubation of cells with recombinant DNA on ice, heat shock (${42}^0$C) treatment with divalent cations placing on ice

Q. Assertion :HIV is called a retro virus. Reason: HIV can synthesize new genomic RNA on the RNA template itself without requiring a DNA intermediate.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Choose the correct option regarding retrovirus.

1. A ssDNA virus
2. A DNA virus that can synthesis RNA during infection.
3. An RNA virus that can synthesise DNA during infection.
4. A dsRNA virus