Gold microparticles are employed in gene gun delivery because their inertness, biocompatibility, and DNA-binding stability enable efficient, non-toxic DNA transfer into cells.
| List-I | List-II |
| A. Abscisic acid | I. Promotes female flowers in cucumber |
| B. Ethylene | II. Helps seeds to withstand desiccation |
| C. Gibberellin | III. Helps in nutrient mobilisation |
| D. Cytokinin | IV. Promotes bolting in beet, cabbage etc |
| List-I | List-II |
| A. ETS Complex I | I. NADH Dehydrogenase |
| B. ETS Complex II | IV. Succinate Dehydrogenase |
| C. ETS Complex III | II. Cytochrome bc1 |
| D. ETS Complex IV | III. Cytochrome C oxidase |