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प्रश्न
Explain, why respiration is said to be a reversed process of photosynthesis?
उत्तर
In respiration, energy is released as a result of oxidation of food, whereas in photosynthesis it is stored up in a carbohydrate molecule. Oxygen is used in respiration whereas it is given out as a by-product in photosynthesis.
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संबंधित प्रश्न
Give suitable biological reasons for the following statement :
All life on Earth is supported by Photosynthesis.
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
Give a balanced chemical equation to represent the process of photosynthesis.
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow : 
Draw a neat, labelled diagram of an experimental steup to show that oxygen is released during photosynthesis
Distinguish between the following:
Photosynthesis and photophosphorylation.
Mention two ways in which photosynthesis is useful to life.
Name the following:
The principle site in a green leaf for photosynthesis.
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.
Complete the following by filling in the blanks numbered 1 to 10 with the appropriate word/term:
Photosynthesis involves light reaction and dark reaction. During light reaction, the chlorophyll present in the (1) ______ gets activated by absorbing light energy. This energy splits (2) ______ molecules to (3) ______ and oxygen and releases two electrons. This process is called (4) ______. The (5) ______ ions are picked up by NADP to form (6) ______. The ADP is converted to (7) ______. This process is called (8) ______. During the dark phase, the compound produced at the end of the light reaction reacts with carbon dioxide to form (9) ______. This product is converted to starch. The process is called (10) ______.
Mention one difference between the following on the basis of what is given in bracket.
Producers and consumers (mode of nutrition)
The site of light reaction in the cells of a leaf is ______.
"Oxygen is a waste product of photosynthesis." Comment.
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
Explain the term Phosphorylation.
Give technical term:
Which process is the ultimate source of energy for all living organisms?
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.
Write the functional activity of the following structure:
Stroma
Choose the correct option.
In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to ______.
The role of chlorophyll is to absorb light from the sun.
Plants inhale and exhale continuously through the ______.
The bending of shoot towards light is due to the hormone ______.
