Multiple choice

Which product of photosynthesis is iodine used to test for?

  1. Starch

  2. Water

  3. Oxygen

  4. Carbon Dioxide

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glucose produced during photosynthesis is rapidly converted into starch for long-term storage in plant tissues. Iodine solution is a classic chemical indicator that turns from brown to blue-black in the presence of starch, confirming that photosynthesis has occurred.