Soalan 1: How sucrose molecule fill up plant cell space(3m)
Jawapan1: Sucrose molecule is bigger in size and cannot diffuse via plasma membrane. It still can diffuse into the cell through cell wall cause the fully permeable to all substances.
Soalan 2
Explain what happens if excess interstitial fluid fail to return to blood circulatory system(3m)
Jawapan2: Interstitial fluid will accumulate and trapped in the space of the capillary/ body tissue. This will cause the flow of other substances such as nutrients, blood plasma, hormones etc are blocked and eventually the area will be swollen.
Soalan 3 A. define competition among bread mould
Jawapan 3A: A same spesies compete to gain the same food and place which is limited.
B. Explain why coverage of yellow mould decrease on day14
Jawapan B: The yellow mould is defeated and loss in the competition
C. A student kept two slices of bread kept in refrigerator. after two weeks he noticed there was no growth on bread. Explain why.
Jawapan 3C: The temperature is low/ 5 C/ cold. The activity of enzymes/mould on the bread is slow down or do not/less active. So, the growth is stunted.
D. Explain why bread mould can grow on the bread evethough it was kept in a dark room
Jawapan D: The growth of bread mould are influenced by the temperature, presence of water, oxygen and nutrient.
Soalan 4
Explain reflex arc invloved when touching a hot object (3m)
Jawapan 4: Reflex arc allows the impulse to be transmitted to the spinal cord without thinking and react immediately by the efector/ finger and it can prevent from serious injury.
