1) Which of the following bacteria reduce nitrate in soil into nitrogen ?

One scientist cultured Cladophora in a
suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of :
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Which of the following is not the function of large intestine?
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4) Significance of ‘heat shock’ method in bacterial transformation is to facilitate the

5) Correct sequence of layers of bacterial cell envelope from outward to inward is

6) Significance of ‘heat shock’ method in bacterial transformation is to facilitate the

7) QBacteria which survive in marshy areas & also present in the gut of many ruminant animals like cows & buffalo's are

8) Antibiotics are mostly obtained from

9) lactic acid bacteria grow in milk and convert it into curd also improve its nutritional quality by increasing

Inclusion bodies of blue-green, purple, and green
photosynthetic bacteria are :

Which of the following is not true about chloramphenicol?
(1) It inhibits the growth of only grampositive bacteria.
(2) It is a broad spectrum antibiotic.
(3) It is not bactericidal.
(4) It is bacteriostatic.

12) BSE and CJD is caused by _____

Nuclear membrane is absent in
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Bacteria reproduces mainly by
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15) Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called

16) Carbohydrates the most abundant biomolecules on the earth are produced by

17) While isolating DNA from bacteria, which of the following enzymes is not used ?

Which of the following bacteria reduce nitrate in soil into
nitrogen ?
1. Nitrobacter
2. Thiobacillus
3. Nitrococcus
4. Nitrosomonas

One scientist cultured Cladophora in a suspension of
Azotobacter and illuminated the culture by splitting light
through a prism. He observed that bacteria accumulated
mainly in the region of :
1. Violet and green light
2. Indigo and green light
3. Orange and yellow light
4. Blue and red light

20) Bacteria is considered  as plants because