Sample Qs-Structure.

A good Qs from Trengganu Trial 2010

QUESTION 1

Answer:

P = hypertonic solution

Q = hypotonic solution [ 1+1 marks]

QUESTION (b) Explain the phenomenon that occurs on animal cell B in solution P and Q

Answer:

(a) Solution P:

F1: Phenomenon is crenation .

P1: Solution P is hypertonic compare to animal cell / cell B.

P2: Water diffused out from animal cell / cell B by osmosis

P3: Animal Cell / cell B shrivels / shrink [ max 3 marks]

Solution Q:

F2: Phenomenon is haemolysis

P4: Solution Q is hypotonic compare to the animal cell / cell B.

P5: Water diffused into animal cell / cell B by osmosis.

P6: Animal cell / cell B expand and burst [max 3 marks]

QUESTION :

(c) Explain why on a hot day and dry season a plant wilt. [ 2 marks]

ANSWER:

F: (On hot day,) plant loses water by transpiration / evaporation of water vapour through the stomata.

P: Plant cells become plasmolysed., causing the plant to wilt.

QUESTION:

Explain how the water move into the cell Z. [ 2 marks]

ANSWER:

P1: The soil water is hypotonic compare to cell sap of root hair // the cell sap is hypertonic compare to the soil solution

P2: Water diffused into cell sap of root hair by osmosis.

TOTAL = 12 marks