Holiday Task 2- Form Four SESERIAN

Well.......................Except for Irin, Nadia Humairah, Nur Adibah and Aunee..i dont know where have all the form 4 Seserian disappear..Maybe they r buzy holidaying wif their families...Yelah..tahun ni bukan exam SPM macam Valiant...yang semakin cemas...because SPM sudah mengetuk pintu..knock..knock...knockkk..Valiant dah cemas...especially sape yang masih belum prepare...But its never too late to start...Dah memang patut start NOW..Jgn tunggu lagi...

Ok..here is another Task for The Four girls listed up there...(Valiant can try too for Revision...)

QUESTIONs
1. Molecules that can move easily through the plasma membrane by simple
diffusion include
I water
II oxygen
III carbon dioxide
IV fat-soluble vitamins
A I and II only
B II and IV only
C I, II and III only
D I, II, III and IV only

2. What are the processes involved in the movement of water (X) and mineral ions (Y) into root hairs?
X Y
A. Osmosis Active transport
B. Osmosis Facilitated diffusion
C Facilitated diffusion Osmosis
D Active transport Osmosis

3. Cucumber slices are immersed in 0.1% sucrose solution. After 3 hours, the slices are found to be turgid and hard. Which of the following statements explains this phenomenon?
A The cucumber cell wall prevents it from shrinking
B The cell sap is hypotonic towards the sucrose solution
C The high concentration of the cell sap in the vacuole causes water to diffuse in
D The cucumber cell wall allows the sucrose molecules to diffuse into the cell

4. A plant cell immersed in distilled water. Which of the following is true about the movement of water molecules in the early stage?
A The rate of water molecules exiting the cell is higher than entering the cell
B The rate of water molecules entering the cell is higher than exiting the cell
C No water molecules are entering or exiting the cell
D The rate of water molecules entering and exiting the cell is the same

5. Nadia is going to prepare some mango pickle. First, she cuts and washed the mangoes. Then she adds vinegar and sugar to the mangoes. After one month, the mango pickle remains in good edible condition because
I The pH of the solution is low
II The bacteria that cause food spoilage loses water to the surroundings
III The dehydrated condition of the fruit inhibits the grouth of bacteria
IV The high concentration of vinegar in the pickles is not conducive to the
growth of bacteria
A I, II and III only
B I, III and IV only
C II, III and IV only
D I, II, III and IV

6. A plasmolysed cell can revert to its normal condition by being
A Immersed in pure water
B Immersed in a concentrated salt solution
C Immersed in 10% sugar solution
D Taken out quickly from the solution

7. Which of the following processes is affected by the presence of a metabolic poison?
A Absorption of water by root hairs
B Uptake of iodine by algae living in the sea
C Absorption of digested food in the small intestine
D The movement of amino acids across the plasma membrane

8. Preservation of the food by eliminating water from the food involves
A osmosis
B simple diffusion
C active transport
D facilitated diffusion

ESSAY QUESTION

9. Some housewives believe soaking vegetables in salt solution before cooking can help eliminate the harmful effects of insecticides that are sprayed on the vegetables.
(i) Explain why vegetables become soft if they are soaked too long in salt solution.
(ii) Suggest how the housewives can restore the vegetables which have become wilt to their normal condition. [5 marks]

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