15464.Which of the following protects the bacteria from the enzymes present in the external medium?
Flagella
S-layer
Slime layer
Cell wall
15466.N-acetylmuramic acid is found in
Cell wall component of plant
Cell wall component of Gram positive bacteria
Cell wall component of fungi
Viral coat material
15467.Which one of the following is correct about Cosmid?
Extra genetic material in mycoplasma
Circular DNA found in bacteria
Extra DNA in bacteria
Fragment of DNA inserted in bacteria for forming copies
15468.A bacterium which is capable of utilizing the most abundantly available gas in the atmosphere for one of its metabolic pathways, but cannot utilize the second most abundantly available for its another metabolic pathway is
Azotobacter
Clostridium
Rhodomicrobium
Xanthomonas
15469.Study the following columns and select the most appropriate matching from the options below.
| Column I | Column II |
|---|---|
| A. Devoid of flagella | I. Single spherical bacterium |
| B. Rod shaped | II. Pneumonia causing bacteria |
| C. Bacteria in pairs | III. Anthrax causing bacteria |
| D. Comma shaped | IV. Cholera causing bacteria |
| V. Pleomorphic bacteria |
A - I, B - II, C - III, D - IV
A - V, B - IV, C - II, D - I
A - I, B - III, C - II, D - IV
A - V, B - I, C - II, D - IV
15470.Which of the following statements is false?
The bacteriophage has a double-stranded DNA molecule
Most plant viruses are RNA viruses
TMV has a double-stranded RNA molecule
Most animal viruses are DNA viruses
15471.Study the following columns and select the most appropriate matching from the options below.
| Column I | Column II |
| A. Pasteurella pestis | I. Angular leaf spot of cotton |
| B. Treponema pallidum | II. Amphotericin |
| C. Mycobacterium bovis | III. Actinomycosis of cattle |
| D. Streptomyces nodosus | IV. Syphilis |
| V. Plague |
A - IV, B - I, C - II, D - III
A - II, B - III, C - IV, D - V
A - V, B - IV, C - III, D - II
A - III, B - II, C - I, D - IV
15472.Specialized cells called heterocysts are present in
Dinoflagellates
Euglenoids
Cyanobacteria
Archaebacteria