Question

Which statement about photosynthesis is false
A)The electron carriers involved in photophosphorylation are located on the thylakoid membrane.
B)Photosynthesis is a redox process, in which water is oxidized and carbon dioxide is reduced.
C)The enzymes required for Carbon fixation are located only in the grana of the chloroplast.
D)In green plants, both PS-I and PS-II are required for the formation of NADPH + H

Answer 1

Photosynthesis is the transformation of light energy into chemical energy by green plants and many other organisms. During photosynthesis in green plants, light energy is taken and used in the conversion of water, carbon dioxide, and minerals into oxygen.

Complete answer:
-The electron carriers in the chain are plastoquinone (bear a resemblance of ubiquinone of mitochondria), plastocyanin (bear a resemblance of small copper-containing protein), and ferredoxin (bear a resemblance of iron-sulfur center). These three accept an electron from quinones and draw ${ H }^{ + }$ over the membrane. By the process of water oxidation, ${ H }^{ + }$ is released into the thylakoid space and consumed in the stroma during the formation of NADPH. Therefore option A is correct.
-Oxidation and reduction both occur in Photosynthesis. Hence it is a redox reaction. Water oxidized into oxygen by ATP and NADPH. Therefore option B is correct.
-The energy is trapped by the light reactions to produce chemical bonds, ATP, and NADPH and this takes place in the stroma where basically carbon fixation takes place. Therefore option C is incorrect.
-ATP is the storage molecule of energy and NADPH is the reduced electron carrier. The PS-I and PS-II both contain several pigments that help in collecting light energy. Therefore option D is correct.

Additional Information: -If the process of photosynthesis stops there will be little food or other organic matter present on earth.
-Photosynthesis is very important in maintaining the earth's atmosphere.
-Energy which is produced by photosynthesis is carried out by plants a million years ago which is responsible for the formation of fossil fuels.

So, the correct answer is, "The enzymes required for Carbon fixation are located only in the grana of chloroplast".

Note: -There are two stages of photosynthesis: light-dependent reactions and the Calvin cycle. Light dependent reactions occur in the thylakoid membrane which converts light energy to ATP and NADPH.
-Carbon dioxide taken by plants during photosynthesis and releases oxygen into the atmosphere.