SSC CGL 2020 PYQ — Question 28

SSC CGL - 4th March 2020 Shift 3 • General Awareness • Q28

Which of these is the energy conversion that happens in the process called photosynthesis?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is Option 2 i.e. Light energy to chemical energy

In photosynthesis, plants, algae, and some bacteria convert light energy (from the sun) into chemical energy (stored in glucose). Chlorophyll absorbs light, driving reactions that produce oxygen and energy-rich molecules like ATP and NADPH, which are used to synthesize sugars.

Other Options:

  1. Heat energy to chemical energy – Incorrect, as photosynthesis relies on light, not heat, as the primary energy source.

  2. Heat energy to light energy – Incorrect, as this describes processes like incandescence, not photosynthesis.

  3. Potential energy to chemical energy – Incorrect, because potential energy (e.g., in water behind a dam) is unrelated to photosynthesis, which directly uses light.

Thus, photosynthesis specifically transforms light energy into chemical energy.