Q. No.What is not true for Mycorrhizae?
I. Nearly 30% of vascular plants have this symbiotic relationship with fungi.
II. The fungus primarily makes nitrogen available to plants.
III. Fungi get organic carbon from plants.
(1) I alone
(2) I and II only
(3) II and III only
(4) I, II and III
Identify the group of fungi that is not correctly matched with all the characters given below:
| 1. | Phycomycetes: | Mycelium – aseptate and coenocytic / Asexual reproduction by motile zoospores or by nonmotile aplanospores / spores – endogenously produced in the sporangium |
| 2. | Ascomycetes: | Mycelium – unbranched and septate / Asexual spores are conidia / Conidia produced endogenously on conidiophores. |
| 3. | Basidiomycetes: | Mycelium–branched and septate / Asexual spores are generally not found. |
| 4. | Deuteromycetes: | Only the asexual or vegetative phase of these fungi are known. |
Match the names of the scientists with contribution and choose your answer from the codes given below:
|
|
Scientists |
|
Contribution |
|
I. |
Beijerinek |
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 |
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 |
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