Q. No.Match the names of the scientists with contribution and choose your answer from the codes given below:
Scientists
Contribution
I.
Beijerinck
1.
Gave the name ‘virus’
II.
Luc Montagnier
2.
Gave the term ‘conragium vivum fluidum’
III.
Pasteur
3.
Discovered bacteriophages
IV.
Twort
4.
Crystallized TMV
V.
Stanley
5.
Isolated HIV
Codes:
I
II
III
IV
V
(1)
2
5
1
3
4
(2)
2
3
1
5
4
(3)
4
5
1
3
2
(4)
4
3
1
5
2
Scientists
Contribution
I.
1.
Gave the name ‘virus’
II.
Luc Montagnier
2.
Gave the term ‘conragium vivum fluidum’
III.
Pasteur
3.
Discovered bacteriophages
IV.
Twort
4.
Crystallized TMV
V.
Stanley
5.
Isolated HIV
I
II
III
IV
V
(1)
2
5
1
3
4
(2)
2
3
1
5
4
(3)
4
5
1
3
2
(4)
4
3
1
5
2
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. |
Which of the following statements regarding Euglenoids is not true?
| 1. | Instead of a cell wall, they have a lipid rich pellicle |
| 2. | They have two flagella, a short and a long one |
| 3. | They are photosynthetic in the presence of sunlight but behave like a heterotroph when deprived of sunlight |
| 4. | Pigments of Euglenoids are identical to those present in higher plants |
Identify the incorrectly matched pair:
1. Diatoms: Chief producers in oceans
2. Dinoflagellates: Red tides
3. Slime moulds: Spores dispersed by water
4. Euglenoids: Protein rich pellicle
The domain Archaea is not characterized by:
(1) Pseudopeptidoglycan in cell wall
(2) Linear chromosomes
(3) Introns present is some genes
(4) Methanogeneisis as unique metabolism
Members of Kingdom Protista:
1. are primarily aquatic
2. do not have membrane bound organelles
3. are all ciliated or flagellated
4. reproduce exclusively by asexual means
Match each item in Column I with one in Column II and select your answer from the codes given below:
| Column I | Column II | ||
| A. | Diatoms | a. | Protein-rich layer of pellicle |
| B. | Dinoflagellates | b. | Cell wall embedded with silica |
| C. | Euglenoids | c. | Spores with true walls |
| D. | Slime moulds | d. | Cellulose plates in the cell wall |
Codes:
| A | B | C | D | |
| 1. | b | a | c | d |
| 2. | b | d | a | c |
| 3. | b | c | a | d |
| 4. | b | a | d | c |
All the following statements regarding Basidiomycetes are correct except:
| 1. | The mycelium is branched and septate |
| 2. | Asexual spores and vegetative reproduction are generally not found |
| 3. | Sex organs are absent |
| 4. | Basidiospores are exogenously produced on the basidium |
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 |
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