| Front | Describe how a sample consisting only of chloroplasts could be obtained from homogenised plant tissue. ( 3 marks) |
|---|---|
| Back | use of differential centrifugation/or description first/low-spin pellet discarded / spin at low speed to remove cell wall material/cell debris supernatant re-spun at higher speed / until pellet with chloroplasts is found method of identifying chloroplasts e.g. microscopy; |
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