7. Oil extracted from the seeds of the crop false flax (Camelina sativa) can be used as fuel - Scottish Highers Biology - Question 7 - 2018
Question 7
7.
Oil extracted from the seeds of the crop false flax (Camelina sativa) can be used as fuel. An investigation was carried out into the effect of a plant growth reg... show full transcript
Worked Solution & Example Answer:7. Oil extracted from the seeds of the crop false flax (Camelina sativa) can be used as fuel - Scottish Highers Biology - Question 7 - 2018
Step 1
Use values from the graph to describe the difference in absorption spectra of the pigments from treated and untreated plants.
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Answer
The graph indicates that the treated plants exhibit a greater absorption of light between 450-600 nm compared to the untreated plants. This suggests that the pigments in the treated plants are more efficient in absorbing light in this wavelength range.
Step 2
Use evidence from the table to explain the difference in the absorption spectra.
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Answer
The table shows that treated plants have a higher carotenoid content (3.98 mg/g) compared to untreated plants with 3.02 mg/g. This increased carotenoid content is associated with enhanced absorption of light in the 450-600 nm range, explaining the observed difference in the absorption spectra.
Step 3
State one use that plants make of the light energy absorbed by pigments during photosynthesis.
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Answer
Plants convert light energy into chemical energy, primarily in the form of ATP, during the process of photosynthesis.
Step 4
Suggest why seeds from the plants treated with PBZ yield more oil.
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Answer
The seeds from the plants treated with PBZ yield more oil due to enhanced photosynthesis, resulting in more energy being directed towards oil production and seed development.
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