According to United Nations projections, by the year 2050, approximately two-thirds of the world’s population is expected to live in urban areas due to ongoing urbanization. This growth is expected as people move from rural to urban areas in search of better opportunities.
- Option (A) "One fourth" is incorrect as the estimate is much higher.
- Option (B) "Half" is also incorrect because the estimate is above 50%.
- Option (C) "Two third" is correct, as it reflects the projected urban population.
- Option (D) "Three fourth" is an overestimate, as the expected percentage is around two-thirds.
Thus, the correct answer is (C) Two third.
Study the given below single strand of deoxyribonucleic acid depicted in the form of a “stick” diagram with 5′ – 3′ end directionality, sugars as vertical lines and bases as single letter abbreviations and answer the questions that follow.
Name the covalent bonds depicted as (a) and (b) in the form of slanting lines in the diagram.
How many purines are present in the given “stick” diagram?
Draw the chemical structure of the given polynucleotide chain of DNA.
| Concentration of KCl solution (mol/L) | Conductivity at 298.15 K (S cm-1) | Molar Conductivity at 298.15 K (S cm2 mol-1) |
|---|---|---|
| 1.000 | 0.1113 | 111.3 |
| 0.100 | 0.0129 | 129.0 |
| 0.010 | 0.00141 | 141.0 |