Which one of the following pairs is not correctly matched?

(1)

Streptomyces     

- Antibiotic

(2)

Serratia

- Drug addiction

(3)

Spirulina

- Single cell protein

(4)  

Rhizobium     

- Biofertilizer

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The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph?

(1) Sigmoid

(2) Hyperbolic

(3) Ascending straight line

(4) Descending straight line

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The outermost limiting layer of mycoplasma is made up of

(1) cell wall

(2) cell membrane

(3) mucilaginous sheath

(4) slime layer

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By all of the following ways bacteria become resistant to antibiotic except

(1) making enzymes that inactivate the drug

(2) becoming impermeable to the drug

(3) modifying the target of the drug

(4) moving away from the drug.

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Protista differs from monera in having

(1) cell wall

(2) autotrophic nutrition

(3) flagella

(4) nuclear membrane

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Which of the following is correct?

(1) All fungi are filamentous.

(2) Transfer of DNA from one bacteria to another bacteria cannot take place.

(3) Virus cannot have both DNA and RNA.

(4) Protists reproduce asexually only.

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Deuteromycetes are known as fungi imperfecti because

(1) their zygote undergoes meroblastic and holoblastic cleavage

(2) only asexual stages are known

(3) they have aseptate mycelium

(4) they are autotrophic

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The genetic material in tobacco mosaic virus is

(1) ss DNA

(2) ss RNA

(3) ds RNA

(4) ds DNA

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Yeast is not included in protozoans but in fungi because

(1) it has chlorophyll

(2) it shows saprotrophic mode of nutrition

(3) it has eukaryotic organisation

(4) cell wall is made up of cellulose and reserve food material as starch.

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Identify the labelled part in the given figure and select the correct option.

 

A

B

(1)

Heterocyst

Mucilaginous sheath

(2)

Mucilaginous sheath  

Heterocyst

(3)

Heterocyst

Capsid

(4)  

Pseudopodia

Mucilaginous sheath

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