MCQ
Middle lamella is formed of:
- ACalcium pectate
- BCellulose
- CHemicellulose
- DLignin
Explanation:
The cell wall of two cells are join together by the middle lamella. Middle lamella is a jelly like substance which is made up of calcium and magnesium pectate.
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Consider the following information in respect of four objects A, B, C and D:
| Object | Density (kg/m3) | Volume (m3) | Mass (kg) |
| A | - | 2 | 4000 |
| B | 8000 | 4 | - |
| C | 2000 | - | 1000 |
| D | - | 4 | 2000 |
Which object would float on water?