Q. No.Lichens, viruses, viroids and prions have been included in the kingdom –
| 1. | Monera | 2. | Protista |
| 3. | Plantae | 4. | None of the above |
Viruses did not find a place in classification because –
| 1. | They do not possess a cellular structure |
| 2. | They can be crystallized |
| 3. | They do not divide outside the cell |
| 4. | All of the above |
Identify the incorrect statement:
| 1. | Virus has a protein coat called capsid made of small subunits called capsomeres. |
| 2. | The core has the genetic material - either RNA or DNA or both. |
| 3. | The capsomeres are arranged in helical or icosahedral forms. |
| 4. | Viruses can infect any type of organism. |
Match the Scientists in Column I with their contribution in the field of virology given in Column II and select your answer from the codes given below:
| Column I | Column II | ||
| A. | Ivanowsky | a. | Recognized tobacco mosaic is caused by microbes smaller than bacteria |
| B. | Beijerinck | b. | Demonstrated extract of infected tobacco plants could cause infection in healthy plants |
| C. | Stanley | c. | Showed that viruses could be crystallized |
Codes:
| A | B | C | |
| 1. | a | b | c |
| 2. | a | c | b |
| 3. | b | a | c |
| 4. | b | a | d |
What is true for both (a) and (b)?
1. RNA is the genetic material
2. Capability to infect bacteria
3. Being obligate endoparasites
4. Can be killed by antibiotics
Which statement is wrong for viruses?
1. All are parasites
2. All of them have helical symmetry
3. They have ability to synthesize nucleic acids and proteins with the help of host cell
4. Antibiotics have no effect on them
Which of the following shows coiled RNA strand and capsomeres?
1. Polio virus
2. Tobacco mosaic virus
3. Measles virus
4. Retrovirus
Viruses have
1. DNA enclosed in a protein coat
2. prokaryotic nucleus
3. single chromosome
4. Both DNA and RNA
Which of the following is correct?
1. All fungi are filamentous.
2. Transfer of DNA from one bacteria to another bacteria cannot take place.
3. Virus cannot have both DNA and RNA.
4. Protists reproduce asexually only.
Which of the following is not a bacterial disease
1. Citrus canker
2. Cholera
3. Plague
4. Mumps
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