a) X - Chloroplasts, Y - Cell vacuole or sap vacuole
b) To be exposed hence receive maximum amount of light
johnmulu answered the question on May 1, 2017 at 09:14
- The graph below shows the effect of substrate concentration on the rate of enzyme reaction(Solved)
The graph below shows the effect of substrate concentration on the rate of enzyme reaction
a) i) Account for the shape of the graph between A and B.
ii) B and C
b) How can the rate of reaction be increased after point B?
c) State two other factors that affect the rate of enzyme reaction
Date posted: May 1, 2017. Answers (1)
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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.
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?
b) What food test was carried out?
c) Why was it necessary to keep the plant in darkness before the experiment?
Date posted: May 1, 2017. Answers (1)
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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. Answers (1)
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Students set up an experiment as illustrated below.
a)Name the physiological process that resulted in the observations made after 30 minutes.
b) State the importance of the physiological process investigated in plants.
c) Explain the observation made after 30 minutes
Date posted: May 1, 2017. Answers (1)
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The table below shows the concentration of sodium and iodine in sea water and cell sap of a plant
a) i) Name the process through which the plant cells take up sodium ions.
ii) Give a reason for your answer in (a) above
b) If the plant was sprayed with a chemical that inhibits respiration:
i) Which of the two ions uptake will be affected?
ii) Give a reason for your answer in (b) (i) above
Date posted: May 1, 2017. Answers (1)
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State two adaptations of chloroplast to its function
Date posted: May 1, 2017. Answers (1)
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a) Concentration of carbon (IV) oxide
b) Light intensity (Solved)
Explain how the following factors affect the rate of photosynthesis:
a) Concentration of carbon (IV) oxide
b) Light intensity
Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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b) Tissue that is removed when the bark of a dicotyledonous plant is ringed.(Solved)
Name the: a) Material that strengthens xylem tissue.
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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Date posted: May 1, 2017. Answers (1)
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b) What is meant by each of the following terms?
(Solved)
a) Explain two roles of diffusion in human beings
b) What is meant by each of the following terms?
I) Crenated cell.
II) Flaccid cell.
Date posted: May 1, 2017. Answers (1)
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The diagram below shows a set-up for an experiment to demonstrate a certain physiology process.
a) What nature of solution is represented by 20% sugar solution?
b) Explain the observation made on the set-up after one hour.
Date posted: April 29, 2017. Answers (1)
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State two ways in which osmosis is significant to plants
Date posted: April 29, 2017. Answers (1)