Sponsor Area
Economic Importance of Bacteria and Fungi
State the differences between
(a) Decay and Putrefaction
(b) Pasteurization and Sterilization
(a) Decay and Putrefaction
|
Decay |
Putrefaction |
|
1. It is the complete breakdown of organic matter by bacteria. |
1. It is the incomplete breakdown of organic matter by bacteria. |
|
2. Does not emit a foul smell |
2. Emits a foul smell |
(b) Pasteurization and Sterilization
|
Pasteurization |
Sterilization |
|
1. Temperature- 60C |
1. Temperature- 110C |
|
2. Does not kill spores |
2. Kills even spores |
|
3. Partial sterilization |
3. Complete sterilization |
|
E.g. Pasteurization of milk |
E.g. Sterilization of canned food |
- Bacteria are no more classified as plants primarily because:
(a) these are unicellular
(b) these are microscopic
(c) many of them are parasitic
(d) they have no chlorophyll
- A particular species of which one of the following, is the source bacterium of the antibiotic, discovered next to penicillin, for the treatment of tuberculosis?
(a) Escherichia
(b) Streptomyces
(c) Rhizobium
(d) Nitrobacter
- Which bacteria is rod shaped?
(a) Coccus
(b) Spirillum
(c) Bacillus
(d) Vibrio
- Which bacteria fixes nitrogen in the soil?
(a) Nitrobacter
(b) Nitrosomonas
(c) Rhizobium
(d) Clostridium
(a) these are unicellular
(b) these are microscopic
(c) many of them are parasitic
(d) they have no chlorophyll
- A particular species of which one of the following, is the source bacterium of the antibiotic, discovered next to penicillin, for the treatment of tuberculosis?
(a) Escherichia
(b) Streptomyces
(c) Rhizobium
(d) Nitrobacter
- Which bacteria is rod shaped?
(a) Coccus
(b) Spirillum
(c) Bacillus
(d) Vibrio
- Which bacteria fixes nitrogen in the soil?
(a) Nitrobacter
(b) Nitrosomonas
(c) Rhizobium
(d) Clostridium
- (d) they have no chlorophyll
- (b)Streptomyces
- (c) Bacillus
- (c)Rhizobium
Name the three common types of bacteria.
The three common types of bacteria are:
- Cocci (spherical bacteria)
- Bacilli (rod-shaped bacteria)
- Spirilla (spiral bacteria)
Match the items in Column A with those in Column B.
|
Column A |
Column B |
|
(i) Penicillium |
(a) Bacteria occuring in chains |
|
(ii) Diplococci |
(b) Antibiotic |
|
(iii) Streptococci |
(c) Bacteria occurring in pairs |
|
Column A |
Column B |
|
(i) Penicillium |
(b) Antibiotic |
|
(ii)Diplococci |
(c) Bacteria occurring in pairs |
|
(iii)Streptococci |
(a) Bacteria occuring in chains |
Sponsor Area
Mock Test Series
Mock Test Series