<prompt> Which of the following cell organelle is rich in catalases?MitochondriaRibosomePeroxisomeCell membrane  <response>: Peroxisomes are 0.5 m in diameter, are surrounded by a membrane, and contain enzymes that can either produce H2O2 oxidases or break it down catalases. Ref: Ganongs Review of Medical Physiology 23rd edition, Chapter 2. 