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Question
A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
Options
remove chlorophyll from leaves
remove starch from the leaves
ensure that no photosynthesis occurred
ensure that the leaves are free from starch
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Solution
ensure that the leaves are free from starch
RELATED QUESTIONS
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow:

- Name the factor studied in this experiment.
- What will you observe in the experimental leaf after the starch test?
- Explain the process of photosynthesis.
- Give a balanced chemical equation to represent the process of photosynthesis.
- Draw a neat, labelled diagram of an experimental setup to show that oxygen is released during photosynthesis.

Fig. represents the vertical section of a leaf.
- Name the parts labelled 1 to 5.
- What do the two arrows (dotted and solid) indicate in the daytime and at night?
- Could you add one more arrow in the figure? If yes, what for?
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Is there any control in this experiment? If so, state it.
Give some adaptations in green leaf photosynthesis.
Name the following:
Source of oxygen given out in photosynthesis.
Complete the following sentence with appropriate word:
A dark reaction is a __________ reaction.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The raw materials for photosynthesis include water and CO2.
______ is ATP factory of the cells.
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
