Multiple choice

Which of the following is an abnormal and hazardous process for biological systems?

  1. Chemosynthesis

  2. Photorespiration

  3. Photo-oxidation

  4. Decolouration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Photo-oxidation is the degradation of a polymer surface in the presence of oxygen or ozone. The effect is facilitated by radiant energy, such as UV or artificial light. This process is the most significant factor in weathering of polymers. Proteins, carbohydrates, fats and nucleic acids are all polymers.

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