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Miracle Learning Centre Science Tuition Question on Photosynthesis. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

1(a) Fig 1.1 was set up to show that a certain factor is needed for photosynthesis. The whole set up was placed in the dark for 24 hours and exposed to sunlight for another two hours.

(i) Suggest a reason why the plant was placed in the dark for 24 hours. ………………………………………………………………….……………..... …………………………………………………………………………………..

(ii) 1. State the factor that the set-up in Fig. 1.1 was testing. …………………………………………………………………………………..

2. Give evidence from the set-up to support your answer. ………………………………………………………………….……………..... …………………………………………………………………………………..

(iii) At the end of the experiment, one of the leaves was tested for presence of starch. 1. State the expected result for the starch test. ………………………………………………………………………………….. [1] 2. Explain your answer. ………………………………………………………………….……………..... …………………………………………………………………………………..

(iv) Suggest a control for this experiment. ………………………………………………………………………………….. [1]

(b) Fig. 1.2 shows the plant where its bark around the stem at region X was treated with a jet of super-heated steam.

(i) Predict what would be observed one week later. ………………………………………………………………………………….. [1]

(ii) Give reasons to support your answer. ………………………………………………………………….……………..... ………………………………………………………………….……………..... ………………………………………………………………………………….. [2]

(iii) State a substance that could be found in the fluid extracted from the bark just above region X. ………………………………………………………………………………….. [1]

Miracle Learning Centre Answer to Science Tuition Question on Photosynthesis. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

Learn from our Science Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Science tuition, Maths tuition, Chemistry tuition and Physics tuition classes.