Multiple choice

Which chemical produces tears when vacuoles of onion are broken?

  1. 1-propenesulfenic acid

  2. Syn-propanethial-S-oxide

  3. Ellagic acid

  4. Theaflavin-3-gallate

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

Syn-propanethial-S-oxide is formed by the action of lachrymatory factor synthase (LFS) on 1-propensulfenic acid and produces tears in eyes.