| 1. | |
2. | |
| 3. | 4. |
| 1 | 2 | 3 | |
| 1. | 1.0 | 3.4 | 34 |
| 2. | 2.0 | 0.34 | 3.4 |
| 3. | 2.0 | 3.4 | 0.34 |
| 4. | 4.0 | 3.4 | 0.34 |
| 1. | Thymine | 2. | Uracil |
| 3. | Adenine | 4. | Guanine |
In the given diagram showing two helices A and B:
| 1. | A is left handed helix and B is right handed helix |
| 2. | A is right handed helix and B is left handed helix |
| 3. | Both are right handed helices |
| 4. | Both are left handed helices |
| 1. | identical |
| 2. | coiled around each other |
| 3. | parallel to each other |
| 4. | complementary to each other |
At each step of ascent, the helical strand of DNA turns
| 1. | 36 degree | 2. | 34 degree |
| 3. | 20 degree | 4. | 180 degree |
The pitch of DNA helix is:
| 1. 0.34 nm | 2. 3.4 nm |
| 3. 34 nm | 4. 340 nm |
| I: | a phosphate moiety links the 5’ carbon of one sugar of one nucleotide to the 1’ carbon of the sugar of the succeeding nucleotide. |
| II: | the backbone of the strand is made up of alternate sugar and nitrogenous bases. |