Junior Secondary · Science
5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Photosynthesis .
During the starch test on a leaf, the leaf is boiled in alcohol. A student notices that the alcohol turns green while the leaf becomes pale or white. What is the biological significance of this step for the accuracy of the subsequent iodine test?<\/p>
Consider the energy transformations occurring in a plant. Which sequence correctly represents the flow of energy during and after photosynthesis?<\/p>
When a plant synthesizes cellulose to build new cell walls, the primary source of the mass for these structural components comes from which of the following?
Which of the following experimental setups would best prove that light is necessary for photosynthesis, ensuring all other variables are controlled?<\/p>
A corn plant produces ears of corn rich in starch and cellulose. When measuring the dry mass of the corn kernels, which environmental raw material was the primary contributor of the atoms used to build these carbohydrates?
In the extension part of the curriculum, the chemical equation for photosynthesis is introduced. What is the correct chemical formula for glucose, the carbohydrate produced during this process?
Write your answer out first, then check it against the worked solution.
A student observes that a variegated leaf (a leaf with both green and white areas) only contains starch in its green portions after being exposed to light. Which internal factor necessary for photosynthesis is missing in the white areas of the leaf?
Write your answer out first, then check it against the worked solution.
The concentration of carbon dioxide in a sealed glass chamber containing a plant is measured over 24 hours. Explain why the carbon dioxide concentration typically decreases during the day and increases during the night.
Write your answer out first, then check it against the worked solution.
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