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

Concept Questions :-

Virus & Viroids
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Chromatophores are:

1. present in liopolysaccharide layer of gram negative bacteria

2. colored pigments present in fluorescent bacteria

3. vesicles that store pigments in prokaryotic cells

4. extensions on membrane in cynobacteria 

Concept Questions :-

Kingdom Monera: Blue Green Algae
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Cells in some filamentous cyanobacteria that are specialized 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

Concept Questions :-

Kingdom Monera: Bacterial Classification
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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

Concept Questions :-

Virus & Viroids
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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

Concept Questions :-

Kingdom Fungi:: Introduction
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Methanogens belong to

(1) eubacteria

(2) archaebacteria

(3) dinoflagellates

(4) slime moulds

Concept Questions :-

Kingdom Monera: Bacterial Classification
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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

Concept Questions :-

Kingdom protista: Chrysophytes
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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

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Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom

(1) Protista

(2) Fungi

(3) Animalia

(4) Monera

Concept Questions :-

Kingdom Protista: Introduction
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Difficulty Level: