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प्रश्न
Oxygen given out during photosynthesis comes from water. Explain this statement.
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उत्तर
During the process of photolysis under light reaction, the water molecule split up to release H+ and OH– ions. These OH– react to liberate oxygen. Thus we can say that oxygen liberated during photosynthesis comes from water.
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संबंधित प्रश्न
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
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?
Name the following:
The principle site in a green leaf for photosynthesis.
A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
How do non-green plants such as fungi and bacteria obtain their nourishment?
Respiration is said to be the reversal of photosynthesis.
Name the plant part
- Which bends in the direction of gravity but away from the light.
- Which bends towards light but away from the force of gravity.
Why should the light-dependent reaction occur before the light-independent reaction?
Read the following sentences about photosynthesis:
- Sunlight, carbon dioxide, chlorophyll and water are necessary.
- Oxygen is absorbed.
- Leaves carry out photosynthesis.
- Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to photosynthesis.
An organism A which cannot move from one place to another makes a simple food B from the substances C and D available in the environment. This food is made in the presence of green-colored substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. Does this food give a blue-black color with iodine solution?
a. What is
- organism A
- food B?
- food H?
b. What are C and D?
c. Name green-colored substance E and organ F.
d. What is the process G?
