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प्रश्न
A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.
- Which aspect of photosynthesis is being tested in the above diagram?
- Why was the plant kept in the dark for 24 hours?
- After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.
उत्तर
- Photosynthesis requires chlorophyll.
- To make sure there was no starch on the leaves, the plant was maintained in the dark.
- Leaf A's green portion turns blue-black and its pale yellow portion turns brown following the starch test. using the solution of iodine.
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संबंधित प्रश्न
Complete the following paragraph by filling in the blank (1) to (5) with appropriate words:
To test a leaf for starch, the leaf is boiled in water to (1) _________. It is then boiled in Methylated spirit to (2) ________. The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (3) _____ solution is added. The region of the leaf which contains starch, turns (4) ________and the region while does not contain starch, turns (5) __________.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow : 
What is meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
State the main functions of the following:
Cytokinins
Describe an experiment to prove that sunlight is necessary for photosynthesis.
Mention two ways in which photosynthesis is useful to life.
Name the following:
The products that are formed as a result of photosynthesis.
Choose the correct answer:
The process of photosynthesis occurs by _________
Name the following:
The category of organisms that prepare their own food from basic raw materials.
Are the following statement true or false? Give a reason in support of your answer.
Photosynthesis is considered as a process supporting all life on earth.
Complete the following food chain by writing the names of appropriate organisms in the blanks:
→ __________ → __________ → Hen → Man
Explain the term Phosphorylation.
Give technical term:
In photosynthesis radiant energy is converted into which from?
Give technical term:
Organisms which cannot prepare their own food by photosynthesis.
Choose the correct option.
A cell that lacks chloroplast does not ______.
Choose the correct option.
In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to ______.
______ is positively hydrotropic as well as positively geotropic.
Where does the carbon that is used in photosynthesis come from?
Oxygen is used for the synthesis of protein and fertilizers.
The role of chlorophyll is to absorb light from the sun.
