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

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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

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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

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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

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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

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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

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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

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Cells in some filamentous cynobacteria that are speciallized for nitrogen fixation are called:

1. Phycobilisomes

2. Chromatophores

3. Grana

4. Heterocysts

Concept Questions :-

Kingdom Monera: Blue Green Algae
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Which of the following are found in extreme saline conditions?

(1) Archaebacteria

(2) Eubacteria

(3) Cyanobacteria

(4) Mycobacteria

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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

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