MCQ
In two dimensional AAAA type packing, the coordination number of each sphere is ____________.
- A2
- B12
- ✓4
- D6
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The thick, highly resistant outer layer of pollen wall.

The number of particles (spheres) per unit cell is:
| List I | List II | ||
| i. | Vector | a. | Resistant to cotton bollworms. |
| ii. | Downstream processing | b. | Mobile genetic elements |
| iii. | Cry Proteins | c. | Controls com borer |
| iv. | Transposons | d. | Purifying protein in bio harmaceuticals. |