Advertisements
Advertisements
प्रश्न
Oxygen given out during photosynthesis comes from water. Explain this statement.
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.
APPEARS IN
संबंधित प्रश्न
Formalin, Iodine, DDT, Lime
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
(i) What aspect of photosynthesis was being tested?
(ii) Why was the plant placed in the dark before beginning the experiment?
(iii) During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
(iv) Write a balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat diagram of a chloroplast and label its parts.
Mention two ways in which photosynthesis is useful to life.
How does carbon dioxide return to the atmosphere? Explain.
A student in order to study the importance of certain factors of photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning the student covered one of the leaves with black paper in the centre only. Student placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
(i) What aspect of photosynthesis was being investigated?
(ii) Is there any control in this experiment? If so, state the name.
(iii) Why was the plant kept in the dark before the experiment?
(iv) Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
Choose the correct answer:
The process of photosynthesis occurs by _________
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.
How do non-green plants such as fungi and bacteria obtain their nourishment?
How is the rate of photosynthesis affected when a green plant gets the green light?
Write an experiment to demonstrate that CO2 is necessary for photosynthesis.
Give technical term:
The form of energy is converted into chemical energy during photosynthesis.
Give technical term:
What is the percentage of CO2 in the air?
Give technical term:
Organisms which cannot prepare their own food by photosynthesis.
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.
Choose the correct option.
The sequential order in electron transport from PSII to PSI of photosynthesis is ______.
Answer the following question.
Explain why photosynthesis is considered the most important process in the biosphere.
During photosynthesis, ________ is produced and stored in the leaf.
Oxygen is produced at what point during photosynthesis?
Name the minute openings seen on the lower surface of the leaf.
Which gas evolved during photosynthesis?
