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Questions
What is photosynthesis?
What is photosynthesis? Explain its mechanism.
Solution 1
The process by which green plants use sunlight to make their own food from carbon dioxide and water is known as photosynthesis. This is done in the presence of chlorophyll.
Solution 2
Photosynthesis is a process in which the energy of light is utilized to produce simple organic compounds in autotrophs. In the process of photosynthesis, the energy of sunlight is captured by photosensitive pigment like chlorophyll in green plants. The energy harnessed by light is utilized for the photolysis of water molecules within the chloroplasts of green plants. As a result, nascent oxygen is released as molecular oxygen gas. Hydrogen released by the reduction of water is further utilized by the plants in a light-independent reaction where carbon dioxide is reduced to simple carbohydrates or sugars in a series of metabolic reactions within the plant chloroplasts.
The detailed equation of photosynthesis can be represented as human
\[\ce{6CO2 +12H2O6->C6H12O6 + 6O2 + 6H2O}\]
RELATED QUESTIONS
Give a brief description of the process of synthesis of food in green plants.
All animals and fungi are autotrophs.
Name the pigment which can absorb solar energy.
Where is chlorophyll mainly present in a plant?
What will happen to the rate of photosynthesis on a plant under the following circumstances?
(i) cloudy day in morning but bright sunshine in the afternoon
(ii) no rainfall in the area for a considerable time.
(iii) gathering of dust on the leaves
Most of the plants absorb nitrogen in one of the following forms. This is:
(a) proteins
(b) nitrates and nitrites
(c) urea
(d) atmospheric nitrogen
Which of the following is the only conducting tissue in non-flowering plants?
(a) xylem vessels
(b) sieve tubes
(c) companion cells
(d) tracheids
Distinguish between: Autotrophic nutrition and Heterotrophic nutrition.
Observe the experimental setup shown below. Name the chemical indicated as ‘X’ that can absorb the gas which is evolved as a byproduct of respiration.
What are the by-products of autotrophic nutrition?
