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Which of the following is formed immediately after the first product of photosynthesis?

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Which of the following is formed immediately after the first product of photosynthesis?

A. lipid

B. starch

C. oxygen

D. sugar




Photosynthesis involves a complex reaction between water, carbondioxide, and sunlight. This complex process is divided into two stages which are light and dark reactions.

The first set of reactions that occurs during photosynthesis are called light reactions. During these, water and light energy from the sun react to form NADPH and ATP. Now, these NADPH and ATP are the first unstable products of photosynthesis.

The second stage of photosynthesis is popularly called the dark reactions, during these, CO2 mixes with the energy in ATP and NADPH to form the final product which is glucose (also called sugar).

Now for the right answer to the above question:

  1. A is not the right answer. lipids are never formed during photosynthesis.
  2. B is incorrect. starch is formed from glucose, but through a different process. Photosynthesis ends at the glucose level.
  3. C is incorrect. oxygen is formed at the first stage, during the light reaction.
  4. D is correct. glucose (or sugar) is formed at the second stage after the light reaction, and during the dark reaction.
RELATED!  The process that takes place in the dark stage of photosynthesis is…


You may please note this/these:

  • NADPH stands for ‘Nicotinamide Adenine Dinucleotide Phosphate Hydrogen’.
  • ATP stands for ‘Adenosine triphosphate’.
  • NADPH, ATP, and oxygen are the first products of photosynthesis.
  • NADPH and ATP are the fuel that helps the later formation of glucose (sugar).

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/ culled from 2020 JAMB-UTME biology past question 13 /

1 Answers

  1. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    FIRST PRODUCT should be talking about what was formed during the initial light reaction…

    Admin - May 25, 2021 | Reply

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