MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
By which of the following bonds, a nitrogenous base is linked to the pentose sugar? |
| A. | Phosphate bond |
| B. | Ester bond |
| C. | Peptide bond |
| D. | N-glycosidic bond |
| Answer» E. | |
| 2. |
Which of the following statement is incorrect with respect to pyrimidines? |
| A. | Heterocyclic |
| B. | 7 membered ring |
| C. | Cytosine is an example of pyrimidine |
| D. | Single-ring structure |
| Answer» C. Cytosine is an example of pyrimidine | |
| 3. |
Which of the following statements is correct with respect to purines? |
| A. | Purines are heterocyclic compounds |
| B. | Purines are 7 membered structure |
| C. | Purines are single-ring structure |
| D. | Thymine is an example of purine |
| Answer» B. Purines are 7 membered structure | |
| 4. |
How many components are present in the basic unit of DNA? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 5. |
The genetic material of humans is double-stranded DNA which is circular in shape. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 6. |
Which of the following is correct with respect to the genetic material of 174 bacteriophage? |
| A. | ss DNA, linear |
| B. | ss RNA, linear |
| C. | ss DNA, circular |
| D. | ds DNA, linear |
| Answer» D. ds DNA, linear | |
| 7. |
How many numbers of nucleotides are present in Lambda phage? |
| A. | 48502 bp |
| B. | 98526 bp |
| C. | 10000 bp |
| D. | 5326 bp |
| Answer» B. 98526 bp | |
| 8. |
How many base pairs are present in Escherichia coli? |
| A. | 9856 bases |
| B. | 4.6 x 10<sup>6</sup> bp |
| C. | 3.3 x 10<sup>9</sup> bp |
| D. | 10,000 bases |
| Answer» C. 3.3 x 10<sup>9</sup> bp | |
| 9. |
Which of the following is the characteristic feature of an organism? |
| A. | Number of RNA |
| B. | Number of protein molecules |
| C. | Length of chromosomes |
| D. | Length of DNA |
| Answer» E. | |
| 10. |
Which of the following is not a correct statement with respect to DNA? |
| A. | It is a long polymer |
| B. | It is found in the nucleus |
| C. | It is a basic substance |
| D. | First identified by Friedrich Meischer |
| Answer» D. First identified by Friedrich Meischer | |
| 11. |
Which of the following is not a function of RNA? |
| A. | Messenger |
| B. | Catalysis |
| C. | Adapter |
| D. | Modifier |
| Answer» E. | |
| 12. |
DNA is the genetic material in all the known viruses. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 13. |
How many types of nucleic acids are present in the living systems? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 14. |
In which year, the mechanism for genetic inheritance reached the molecular level? |
| A. | 1986 |
| B. | 1999 |
| C. | 1926 |
| D. | 1945 |
| Answer» D. 1945 | |
| 15. |
Who was the first person to analyse factors? |
| A. | Gross |
| B. | Haeckel |
| C. | Mendel |
| D. | Altmann |
| Answer» D. Altmann | |