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Biology
Plant Nutrition Quiz 2
Topic 5 Quiz 2
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Category: Plant Nutrition Quiz 2
1) The graph shows the rate of photosynthesis plotted against an unknown factor.
Plant Nutrition Question 213
Which factor is limiting the rate of photosynthesis as shown in the graph?
Photosynthesis is speed up by enzymes. Since enzymes are affected by temperature, the graph of rate of photosynthesis against temperature has the same shape as the graph of rate of photosynthesis against temperature has the same shape as the graph of rate of enzyme activity against temperature.
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2) The photograph shows the shapes of the cell in a section of a leaf. Which labelled cells contain chloroplasts?
2 and 3 are the palisade and spongy mesophyll cells which contain chloroplasts.
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3) The diagram shows an experiment set up to investigate photosynthesis.
Which condition would cause the plant to produce most bubbles?
The gas bubbles are given out by plant during photosynthesis. Carbon dioxide, light and warmth are conditions which increase the rate of photosynthesis.
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4) The graph shows the rate of photosynthesis in a pea plant in an atmosphere containing 0.04% carbon dioxide at different light intensities.
At which point on the graph is carbon dioxide concentration a limiting factor?
A limiting factor is any factor that directly affects the rate of a process when its quantity is changed. Although light intensity continues to increase from C to D, the rate of photosynthesis remains constant. However, the rate of photosynthesis can be further increased by supplying the plant with a higher concentration of carbon dioxide, i.e., above 0.04%.
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5) Plants use carbon dioxide and water to carry out photosynthesis. Which description is correct?
Stomata are found on the upper and lower epidermis. They open in sunlight, allowing carbon dioxide to diffuse into the leaf. Xylem transports water and dissolved mineral salts to the leaf from the roots. Option D is incorrect as phloem transports sugars away from the leaf.
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6) The diagram illustrates the structure of one type of plant cell. What type of cell is it?
Plant Nutrition Question 209
It is likely to be a mesophyll cell of a leaf since it has a lot of chloroplasts in its cytoplasm. Epidermis cells and root cells do not contain chloroplasts.
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7) The diagram shows an investigation using an aquatic plant.
What is the main gas present at Y?
In the presence of light, the aquatic plant undergoes photosynthesis. The word equation for photosynthesis is as follows:
Carbon dioxide + water ——→ glucose + oxygen
Y is the gas bubble produced during photosynthesis which contains oxygen.
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8) Diagram 1 shows the structure of a plant cell. Diagram 2 shows a section through part of a leaf. In which part of a leaf would the cell be found?
Region C consists of spongy mesophyll cells. These are irregular in shape and contain many chloroplasts.
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9) The photograph shows part of a green plant. What is X?
Fact. A pair of guard cells come together to form a stomata.
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10) The following equation for photosynthesis is incomplete.
Carbon dioxide and water are inorganic compounds used in the presence of sunlight and chlorophyll to form glucose and oxygen.
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