MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Two DNA samples A and B have melting temperatures 305K and 320K respectively. Identify the correct statement based on this information. |
| A. | A and B are complementary strands |
| B. | B has more CG pairs than A |
| C. | A has more CG pairs than B |
| D. | A has more hydrogen bonds than B |
| Answer» C. A has more CG pairs than B | |
| 2. |
Identify the complementary strand of the DNA primary structure ATGCCGATC. |
| A. | AUGCCGAUC |
| B. | TACGGCTAG |
| C. | UACGGCUAG |
| D. | GATCGGCAT |
| Answer» C. UACGGCUAG | |
| 3. |
Which part of the nucleotide is responsible for the formation of bonds in DNA double helix? |
| A. | Base |
| B. | Sugar |
| C. | Phosphate group |
| D. | Hydroxyl group of sugar |
| Answer» B. Sugar | |
| 4. |
The attachment between the base and sugar in a nucleotide is through ______ bond. |
| A. | hydrogen |
| B. | peptide |
| C. | phosphodiester |
| D. | glycosidic |
| Answer» E. | |
| 5. |
Which of the following best describes cytosine? |
| A. | pyrimidine, present in RNA and DNA |
| B. | pyrimidine, present only in DNA |
| C. | purine, present only in RNA |
| D. | purine, present in RNA and DNA |
| Answer» B. pyrimidine, present only in DNA | |
| 6. |
Nucleotides are linked together by bonds between 5 and 2 carbons of two different pentose sugars. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Which sugar is present in RNA? |
| A. | -D-ribose |
| B. | -D-fructose |
| C. | -D-galactose |
| D. | -D-2-deoxyribose |
| Answer» B. -D-fructose | |
| 8. |
Which of the following bases contain two keto groups? |
| A. | Adenine |
| B. | Guanine |
| C. | Thymine |
| D. | Cytosine |
| Answer» D. Cytosine | |
| 9. |
Which of the following bases is not present in DNA? |
| A. | Adenine |
| B. | Guanine |
| C. | Thymine |
| D. | Uracil |
| Answer» E. | |
| 10. |
DNA is a polynucleotide. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
RNA on hydrolysis does not yield which of the following? |
| A. | Amino acid |
| B. | Pentose sugar |
| C. | Nitrogen base |
| D. | Phosphoric acid |
| Answer» B. Pentose sugar | |