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
Difficulty Level:
Identify the group of fungi that is not correctly matched with all the character given:
|
(1) |
Phycomycetes: |
Mycelium – aseptate and coenocytic / Asexual reproduction by motile zoospores or by nonmotile aplanospores / spores – endogenously produced in 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. |
Difficulty Level:
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 |
Difficulty Level:
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 icosahederal forms.
(4) Virus can infect any type of organisms.
Difficulty Level:
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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
Difficulty Level:
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 pellicle |
|
B. |
Dinoflagellates |
b. |
Cell wall embedded with silica |
|
C. |
Euglenoids |
c. |
Spores with true walls |
|
D. |
Slime moulds |
d. |
Celulose plates in 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 |
Difficulty Level:
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