All the following statements regarding Basidiomycetes are correct except:
1. The mycelium is branched and septate
2. Asexual spores and vegetative reproduction generally not found
3. Sex organs are absent
4. Basidiospores are exogenously produced on the basidium
Difficulty Level:
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. |
Pasteur |
a. |
Gave the name ‘virus’ |
|
B. |
Ivanowsky |
b. |
Recognized tobacco mosaic is caused by microbes smaller than bacteria |
|
C. |
Beijerinck |
c. |
Demonstrated extract of infected tobacco plants could cause infection in healthy plants |
|
D. |
Stanley |
d. |
Showed that viruses could be crystallized |
Codes:
|
|
A |
B |
C |
D |
|
1. |
a |
b |
c |
d |
|
2. |
a |
c |
b |
d |
|
3. |
b |
a |
c |
d |
|
4. |
b |
a |
d |
c |
Difficulty Level:
Cells in some filamentous cynobacteria that are speciallized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
Concept Questions :-
Difficulty Level:
Which of the following are found in extreme saline conditions?
(1) Archaebacteria
(2) Eubacteria
(3) Cyanobacteria
(4) Mycobacteria
Difficulty Level:
Viroids differ from viruses in having
(1) DNA molecules with protein coat
(2) DNA molecules without protein coat
(3) RNA molecules with protein coat
(4) RNA molecules without protein coat
Difficulty Level:
Which one of the following is wrong for fungi?
(1) They are eukaryotic
(2) All fungi possess a purely cellulosic cell wall
(3) They are heterotrophic
(4) They are both unicellular and multicellular
Difficulty Level:
Methanogens belong to
(1) eubacteria
(2) archaebacteria
(3) dinoflagellates
(4) slime moulds
Difficulty Level:
Select the wrong statement.
(a) The walls of diatoms are easily destructible
(b) 'Diatomaceous earth' is formed by the cell walls of diatoms
(c) Diatoms are chief producers in the oceans
(d) Diatoms are microscopic and float passively in water
Difficulty Level:
Match Column I with column II and select the correct option using the codes given below:
|
|
Column I |
|
Column II |
|
A. |
Pistils fused together |
1. |
Gametogenesis |
|
B. |
Formation of gametes |
2. |
Pistillate |
|
C. |
Hyphae of higher ascomycetes |
3. |
Syncarpous |
|
D. |
Unisexual female flower |
4. |
Dikaryotic |
Codes:
|
|
A |
B |
C |
D |
|
(1) |
4 |
3 |
2 |
1 |
|
(2) |
2 |
1 |
4 |
3 |
|
(3) |
1 |
2 |
4 |
3 |
|
(4) |
3 |
1 |
4 |
2 |
Difficulty Level:
Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom
(1) Protista
(2) Fungi
(3) Animalia
(4) Monera
Difficulty Level:
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