NEET BIOLOGY

PLANT PHYSIOLOGY

PHOTOSYNTHESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the primary purpose of photosynthesis?
A
to capture light energy, convert some of it into chemical energy, and store it in the form of carbohydrates for other life forms to use
B
to capture light energy and release oxygen into the atmosphere, so that the level of oxygen in the atmosphere increases
C
to take up carbon dioxide from the atmosphere so that the level of carbon dioxide in the atmosphere is reduced
D
None of the above
Explanation: 

Detailed explanation-1: -Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Detailed explanation-2: -The main purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP.

Detailed explanation-3: -The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH. These two energy-storing molecules are then used in the light-independent reactions. Within chloroplasts, chlorophyll is the pigment that absorbs sunlight.

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