a) i) Between A and B - Rapid/ fast increase in the rate of reaction. More active sites of enzymes available, for a large number of molecules of substrate; hence increase in the rate of reaction.
ii) Between B and C - Enzymes/ substrate are in equilibrium/ All active sites are occupied; hence rate of reaction is constant.
b) By raising concentration of enzymes and substrates.
c) pH, temperature, presence of inhibitors/ cofactor and co-enzymes
johnmulu answered the question on May 1, 2017 at 09:07
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In an experiment to investigate a factor affecting photosynthesis, a leaf of a potted plant which had been kept in the dark overnight was covered with aluminum foil as shown in the diagram below.
(Solved)
In an experiment to investigate a factor affecting photosynthesis, a leaf of a potted plant which had been kept in the dark overnight was covered with aluminum foil as shown in the diagram below.
The set up was kept in sunlight for three hours after which a food test was carried out on the leaf.
a) Which factor was being investigated in the experiment?
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c) Why was it necessary to keep the plant in darkness before the experiment?
Date posted:
May 1, 2017
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Answers (1)
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(Solved)
A freshly obtained dandelion stem measuring 5 cm long was split lengthwise to obtain two similar pieces. The pieces were placed in solutions of different concentrations in petri dishes (L1 and L2) for 20 minutes. The appearance after 20 minutes is as shown
State the significance of the biological process involved in the experiment
Date posted:
May 1, 2017
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(Solved)
Students set up an experiment as illustrated below.
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Date posted:
May 1, 2017
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(Solved)
The table below shows the concentration of sodium and iodine in sea water and cell sap of a plant
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Date posted:
May 1, 2017
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Answers (1)
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Date posted:
May 1, 2017
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Explain how the following factors affect the rate of photosynthesis:
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Date posted:
May 1, 2017
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Answers (1)
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Date posted:
May 1, 2017
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Answers (1)
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Date posted:
May 1, 2017
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Date posted:
May 1, 2017
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Date posted:
May 1, 2017
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May 1, 2017
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May 1, 2017
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Date posted:
May 1, 2017
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Name the: a) Material that strengthens xylem tissue.
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(Solved)
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May 1, 2017
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State one effect of magnesium deficiency in green plants.
Date posted:
May 1, 2017
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Date posted:
May 1, 2017
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(Solved)
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Date posted:
May 1, 2017
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Answers (1)
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The diagram below shows a set-up for an experiment to demonstrate a certain physiology process.
(Solved)
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Date posted:
April 29, 2017
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April 29, 2017
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