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Sugar is soluble in water so it tends to diffuse and be lost from the plant however starch is insoluble in water. Therefore the breakdown of starch into sugar is favoured.

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Ai) The greater the light intensity, the greater the amount of starch produced.

Aii) At night, no photosynthesis occurs so starch stored during the day by the plants is converted to sugar to provide energy for the plant throughout the night. Hence, the amount of starch decreases and the amount of sugar increases.

B)

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1a)i) 96%
1a)ii) 12%
1b) Haemoglobin combines better with carbon monoxide than oxygen.
1c) The tissue cells will die

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QUESTION 2 HELL YEAH

a (i) The greater the light intensity, the faster the rate of starch production until 12 noon, where the light intensity increases, but the rate of starch production decreases.

(ii) In the absence of light, photosynthesis will cease to occur to a certain extent, and the starch is converted to sugar for the plant to use to carry out certain processes. (respiration)

b) They do not affect the water potential inside cells. They do not move away from the storage areas in the plant

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question 1
ai) 96%
ii) 12%

b)Haemoglobin have a better ability to combine oxygen than compared with carbon monoxide.

c)The man will have a lesser intake of oxygen which will result in the tissue cells in his body to receive insufficient oxygen.

dii) Carbon dioxide will be diffused out of the blood cells.

diii) Carbon dioxide is carried by the blood by diffusion.

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Q2.
(a) (i) the greater light intensity, the greater the starch production
(ii) at night, or in the absence of light, photosynthesis essentially ceases, and respiration is the dominant process so the plant converts sygar to starch (for growth and other metabolic processes).
(iii) glucose/sugar will be difficult to be stored in the plant cells as it is soluble in water and the cytoplasm. however, starch is insoluble in water so it can be stored in the cells easily.

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(ai) carbon monoxide: 96%
(ai) oxygen: 12%
(b) For the same gas concentration of 16mm Hg, carbon monoxide is able to bind with haemoglobin to produce a saturation of 96% but oxygen is only able to produce 12%.
(c)

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c) to see if the carbon dioxide is removed so that we can see the hydrogencarbonate turn purple which means that it is less acidic.
d) to allow the process of photosynthesis to take place.

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b) the greater the relative light intensity, the more the number of bubbles produced.
c)

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(a) (I) the greater the light intensity, the greater the starch production

(ii) At night, the rate of photosynthesis decreases as there is no sunlight therefore, the starch is broken down into glucose to be converted into sucrose for transportation around the plant required for respiration.

(b) Starch is a big polysaccharide which is easily broken down to release glucose molecules for energy release. It is a good storage molecule because it coils into granules that take up very little space (a lot of potential energy in a small amountof space). It is also a good storage molecule because unlike sugar it has no effect on osmotic pressure so does cause the cells to either lose or gain water.