Biology 9700 Practical Notes 100%

Plot a line graph of percentage change against sucrose concentration. The point where the line crosses the x-axis (zero change in mass) represents the point where the water potential of the solution equals the internal water potential of the potato tissue. Method 2: Incipient Plasmolysis

Always follow safety protocols, especially when using toxic chemicals or sharp instruments.

Measure the volume of oxygen released using a gas syringe or by counting bubbles per minute. biology 9700 practical notes

Good luck, biologists. Remember: Measure twice, cut once, and always zero your balance.

Use a sharp pencil to draw small, neat crosses ( ) or ringed dots. Plot a line graph of percentage change against

Use scissors or a scalpel to cut a small sample of tissue, peeling away or cutting a very thin layer of cells. The preparation method must ensure samples are thin enough to allow light to pass through. Place the sample onto a slide, add a drop of water if needed, apply appropriate stain, and gently lower a coverslip.

No. The practical papers assess your practical skills rather than memorisation of specific practicals. However, familiarity with common contexts (enzymes, osmosis, cell structure) is essential. Measure the volume of oxygen released using a

Cut potato cylinders to identical lengths using a cork borer and a razor blade. Record the initial mass or length of each cylinder.

Value of 1 EGU=Number of SMDs×Distance of 1 SMDNumber of EGUsValue of 1 EGU equals the fraction with numerator Number of SMDs cross Distance of 1 SMD and denominator Number of EGUs end-fraction High-Scoring Plan Drawings