Plant Viruses

Q. RNA of HIV is single stranded or double stranded?

Q. Viruses infecting plants usually have ________________ as their genetic material.

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

Q. RNA interference is used for which of the following purposes in the field of biotechnology?

1. to develop a plant tolerant to abiotic stresses
2. to develop a pest resistant plant against infestation by nematode
3. to enhance the mineral usage by the plant
4. to reduce post-harvest losses

Q.

Cauliflower mosaic virus contains :

1. ss RNA

2. ds RNA

3. ds DNA

4. ss DNA

Q.

What are a few examples of plant viral diseases?

Q. The virus given in the diagram infects

1. plants
2. protists
3. animals
4. bacteria

Q.

Is a virus a plant or animal?

Q.

Name the virus which contain RNA as a genetic material

1. TMV

2. Bacteriophage

3. Phage

4. None of these

Q. Which of the following statements is true?

1. Most plant viruses are RNA viruses.
2. TMV has a double stranded RNA molecule
3. Bacteriophage has a double stranded RNA molecule.
4. Most animal viruses are RNA viruses.

Q. The virus given in the diagram infects

1. protists
2. plants
3. animals
4. bacteria

Q. Tobaco mosaic virus is a tubular filament of size :

1. $300\times 5nm$
2. $700\times 30nm$
3. $300\times 10nm$
4. $300\times 20nm$

Q. Match the organism and their infection material given in columns.

Organism	Infections material
(A) TMV	(p) Protein
(B) $\varphi \times 174$	(q) Spiral RNA
(C) Viroid	(r) DNA single stranded
(D) Prions	(s) Circular RNA
	(t) Circular DNA

1. A- q, B- r, C- s, D- p
2. A- r, B- q, C- s, D- p
3. A- q, B- r, C- s, D- t
4. A- s, B- r, C- t, D- q

Q.

Influenza virus, poliomyelitis and rhino virus contain RNA . Single or double?

Q.

How can a virus detect and anchor to it's host being a non living thing?

Q. Briefly describe​
(a) Infectious agents.

Q. Tobacco Mosaic Viruses (TMV) are

1. Rod shaped
2. Spherical
3. Threadlike
4. None of the above

Q.

The genetic material of TMV is

1. double-stranded circular DNA

2. double-stranded linear DNA

3. single-stranded spiral RNA

4. single-stranded straight RNA

Q. Which one of the following statements is correct about the tobacco mosaic virus?

1. It affects all monocotyledonous plants.
2. It affects photosynthetic tissue of the infected plant.
3. It infects gymnosperms.
4. It does not infect other species belonging to the Solanaceae.

Q. What are host cells?

Q. _________ is a plant virus which has DNA.

Q. Viruses infecting plants usually have ________________ as their genetic material.

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

Q. Tobacco mosaic virus (TMV) is very common in the environment and is frequently isolated from tobacco products. Select the correct statement regarding health implication.

1. TMV is a caused of lung cancer.
2. TMV is associated with immune suppression.
3. TMV is associated with skin tumors.
4. There are no health implications so TMV cannot infect human cells.
5. TMV is associated with genetic abnormalities within any cell exposed to secondhand smoke.

Q. A plant virus can affect animals feeding on the infected plant.

1. True
2. False

Q. RNA is the genetic material in

1. prokaryotes
2. Tobacco Mosaic Virus (TMV)
3. eukaryotes
4. E. coil.

Q.

The genetic material of TMV is

1. double-stranded circular DNA

2. double-stranded linear DNA

3. single-stranded spiral RNA

4. single-stranded straight RNA

Q.

how virus reproduce in the host body ?

Q. Viruses parasitising bacteria are

1. Bacteriophages
2. Bacto-viruses
3. Retroviruses
4. Plasmids

Q. A plant virus can affect animals feeding on the infected plant.

1. True
2. False

Q. Viroids have

1. double stranded DNA enclosed by protein coat
2. double stranded RNA enclosed by protein coat
3. single stranded DNA not enclosed by protein coat
4. single stranded RNA not enclosed by protein coat

Q. Tobaco mosaic virus is a tubular filament of size :

1. $300\times 10nm$
2. $300\times 5nm$
3. $300\times 20nm$
4. $700\times 30nm$