| 161 | Nitrogen occurs in plants and animals in the form of | Proteins |
| 162 | The satellites which revolve in such an orbit, so that they move with earth rotation are called | Geo-stationary satellites |
| 163 | Plutonium is used as | Fuel for nuclear fission |
| 164 | In blood, the percentage of water is | 0.92 |
| 165 | A balanced diet contains | Food nutrients for growth and maintenance |
| 166 | Lack of ___ causes diabetes | Insulin |
| 167 | Fuse wire is made of | 63% tin and 37% lead |
| 168 | What is the average adult pulse rate? | 80 - 100 BPM |
| 169 | To find the hidden secrets under the water, the ships and submarines use the | Sonar system |
| 170 | Friction can be reduced by changing over from | Sliding to rolling |