MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which was considered to be as the genetic material prior to the works done by Oswald Avery, Colin MacLeod and Maclyn McCarty? |
| A. | Nucleoids |
| B. | Nucleons |
| C. | Protein |
| D. | Chromosome |
| Answer» D. Chromosome | |
| 2. |
What will be the state of the mouse that has been injected with the heat killed S-strain from the Staphylococcus pneumoniae? |
| A. | Alive |
| B. | Dead |
| C. | On the verge of dying |
| D. | Lives with pneumonia |
| Answer» B. Dead | |
| 3. |
Which of the following is responsible for the inhibition of transformation in organisms? |
| A. | DNase |
| B. | RNase |
| C. | Protease |
| D. | Nuclease |
| Answer» B. RNase | |
| 4. |
Which of the following is responsible for transforming the R strain into the S strain? |
| A. | Purified bio-chemicals from S-strain |
| B. | Purified bio-chemicals from R-strain |
| C. | Purified bio-chemicals from heat killed S-strain |
| D. | Purified bio-chemicals from heat killed R-strain |
| Answer» D. Purified bio-chemicals from heat killed R-strain | |
| 5. |
Which of the following is the wrong sequential order, when the S or the R strain of the bacterium is injected into the mice? |
| A. | Mice -> S strain -> Dead |
| B. | Mice -> R strain -> Alive |
| C. | Mice -> Heat killed S strain -> Alive |
| D. | Mice -> Heat killed S strain + live R strain -> Alive |
| Answer» E. | |
| 6. |
The mice infected with the R strain of the bacterium dies, but when infected with the S strain, they do not die. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 7. |
When Streptococcus pneumoniae were cultured in a culture plate by Frederick Griffith, which among the following were produced? |
| A. | Smooth colonies(S) and Rough colonies (R) |
| B. | Shiny colonies (S) and Rough colonies (R) |
| C. | Smooth colonies (S) and Rigorous colonies (R) |
| D. | Silky colonies (S) and Rigorous colonies (R) |
| Answer» C. Smooth colonies (S) and Rigorous colonies (R) | |
| 8. |
Which of the following bacterium is responsible for causing pneumonia? |
| A. | <em>Staphylococcus saprophyticus</em> |
| B. | <em>Streptococcus pyogenes</em> |
| C. | <em>Staphylococcus aureus</em> |
| D. | <em>Streptococcus pneumoniae</em> |
| Answer» E. | |