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| Q. |
The hydrophilic nature of DNA is due to the presence of – |
| A. | thymine base |
| B. | Biotic resources |
| C. | phosphate group |
| D. | deoxyribose sugar |
| Answer» B. Biotic resources | |
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Explanation: The phosphate groups on DNA are ionic and charged. Each phosphategroup on the DNA back-bone is one unit of negative charge (-1). Charged molecules attract water and are hydrophilic. DNA has two hydrophilic polar external backbones made of sugars and phosphate groups joined by ester bonds. |
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