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Photosynthesis is a/an

  • (a) anabolic, endergonic and oxidation-reduction process Correct
  • (b) catabolic, endergonic and oxidation-reduction process Your answer
  • (c) anabolic, exergonic and oxidation-reduction process Your answer
  • (d) catabolic, exergonic and oxidation-reduction process Your answer
Your answer: Correct answer: (a)
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Explanation

Why (a) is correct

Photosynthesis builds sugar from CO2 and water (anabolic), stores light energy in sugar (endergonic), and water is oxidised while CO2 is reduced (oxidation-reduction).

Why the other options are wrong

  • (b) · your answer Photosynthesis builds molecules, so it is anabolic, not catabolic.
  • (c) · your answer It takes in energy, so it is endergonic, not exergonic.
  • (d) · your answer Catabolic and exergonic describe respiration, not photosynthesis.
NCERT point: In photosynthesis, light energy is converted into chemical energy of food.
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