MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Assume that the growth of bacteria follows first order kinetics with a rate constant of 2/s. If the initial population of the bacteria is 2000, then the population of it after 30s will be _____ |
| A. | 2 10<sup>29</sup> |
| B. | 4 10<sup>29</sup> |
| C. | 2 10<sup>30</sup> |
| D. | 8 10<sup>29</sup> |
| Answer» B. 4 10<sup>29</sup> | |
| 2. |
Bacteria reproduce by ___________ |
| A. | Sexual reproduction |
| B. | Asexual reproduction |
| C. | Spores |
| D. | Sexual reproduction and asexual reproduction |
| Answer» E. | |
| 3. |
Which among the following is incorrect about Lacto bacilli? |
| A. | These are rod shaped bacteria |
| B. | These are the bacteria responsible for turning milk into curd |
| C. | These are parasites |
| D. | They are also useful in industries for fermentation of wine |
| Answer» D. They are also useful in industries for fermentation of wine | |
| 4. |
E.Coli is a rod-shaped bacterium present in ________ |
| A. | Digestive tract of humans |
| B. | Respiratory tract of humans |
| C. | Urogenital tract of humans |
| D. | Excretory tract of humans |
| Answer» B. Respiratory tract of humans | |
| 5. |
Which among the following are incorrect about Mycoplasma? |
| A. | It has rigid cell wall |
| B. | It adopts parasitic mode of nutrition |
| C. | It is present in urogenital tract and blood smears |
| D. | Mycoplasma is the smallest living cell |
| Answer» B. It adopts parasitic mode of nutrition | |
| 6. |
Pseudomonas adopt ___________ |
| A. | Parasitic mode of nutrition |
| B. | Heterotrophic mode of nutrition |
| C. | Saprophytic mode of nutrition |
| D. | Autotrophic mode of nutrition |
| Answer» C. Saprophytic mode of nutrition | |
| 7. |
Which among the following is incorrect about Cyanobacteria? |
| A. | The word cyano means greenish-blue because of which cyanobacteria is also called as blue-green algae |
| B. | The colour of cyanobacteria is due to presence of chlorophyll |
| C. | Cyanobacteria are chemosynthetic autotrophs |
| D. | Cyanobacteria help in enriching oxygen levels in the atmosphere |
| Answer» D. Cyanobacteria help in enriching oxygen levels in the atmosphere | |
| 8. |
In chemosynthetic autotrophs energy to prepare food is obtained from __________ |
| A. | Light energy |
| B. | Chemical energy |
| C. | Bio-energy |
| D. | Thermal energy |
| Answer» C. Bio-energy | |
| 9. |
Archaebacteria can survive in extreme conditions because of the ________ |
| A. | complex metabolic reactions in their body |
| B. | fact that they are the oldest life forms on the earth |
| C. | rigid cell wall they have |
| D. | double membrane nucleus |
| Answer» D. double membrane nucleus | |
| 10. |
Methanogens are present in the ______ |
| A. | Mouth of cow |
| B. | Guts of cow |
| C. | Respiratory system of cow |
| D. | Ribs of a cow |
| Answer» C. Respiratory system of cow | |
| 11. |
Dunaliella salina belongs to the category of ________ |
| A. | Halophiles |
| B. | Thermophiles |
| C. | Hydrophiles |
| D. | Methanogens |
| Answer» B. Thermophiles | |
| 12. |
Monera comprises of prokaryotic organisms like bacteria which are the oldest life forms of the earth. Bacteria are classified based on their shape. |
| A. | True |
| B. | False |
| Answer» B. False | |