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Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

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                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells.   (6) It is differentiated into nodes and internodes.   (7) There are two types of branches that arise from the nodes:       Branches of limited growth        Branches of unlimited growth Batra
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Bacteria and Bacteriophage Questions for NEET

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                               Bacteria & Bacteriophage


Q.1. Bacteria Whose cell has only one curve  ?

A  Vibro

B  Bacillus

C  cocci

D Spiral

Ans :- A

Q.2. Plasmid Structure in Bacteria ?

A Circular

B Helix

C Double Stranded

D Linear

Ans :- A

Q.3. Mesosome in bacteria function as ?

A Golgi bodies

B Mitochondria

C Cell Membrane

D both a and b

Ans :- D

Q.4. Largest among sulphur bacteria are ?

A Chlorobium

B Thiobacillus

C Charomatium

D Beggiatoa

Ans :- D

Q.5. Provirus is ?

A. A free DNA

B. An integrated viral genome

C. A virus

D. A primitive virus

Ans :- B

Q.6. Cell Wall of bacteria composed of ?

A. Cellulose

B. N-acetyl glucosamine

C. N-actyl murmaric acid

D. Both B and C

Ans:- D

Q.7. Bacteria is differ from other lower plants ?

A. DNA

B. RNA

C. Cell Wall

D. Nucleus

Ans:- D

Q.8. Bacteriophage Kills the ?

A. Virus

B. Bacteria

C. Both
D. None of these

Ans:- B



Q.9.Germ theory of disease was putforth by ?

A. Edward Jenner

B. Weisman

C. Louis Pasteur

D. Robert Koch

Ans:- B.

Q.10.Cyclosis Process in bacteria ?

A. Absent

B. present

C. May be Present or Not

D. None of these

Ans:- A

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Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

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                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells.   (6) It is differentiated into nodes and internodes.   (7) There are two types of branches that arise from the nodes:       Branches of limited growth        Branches of unlimited growth Batra
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