Japanese Journal of Biological Education
Print ISSN : 0287-119X
Volume 45 , Issue 1
Showing 1-2 articles out of 2 articles from the selected issue
  • M. Hayakawa
    2005 Volume 45 Issue 1 Pages 16-22
    Published: 2005
    Released: September 25, 2021

    Generally, in high school biology experiments, catalase has been used when study ing enzymes. However, nowadays students are not familiar with catalase reaction because hydrogen peroxide solution has recently not been commonly used for the sterilization of wounds. In addition, since the catalase enzyme existing in the cells cannot be detected by the naked eye, its existence is difficult for students to under stand. I introduced washing detergents in my biology laboratory class to study en zymes. Most washing detergents contain two or three kinds of colored granules and one of them contains a protease. To build students’ interest in the experiment, they were asked to guess the colored granule containing the protease. For detect ing the protease activity, I used the plate method which was developed by Shino hara in 1975. As a result of the examination, the degree of interest in searching for the engyme incleased among the students. Furthermore, the students could understand the purpose of the experiment because the method was simple and the results were clear. Therefore, the enzyme experiment using the granule in the washing detergents is considered to be effective for learning about enzymes when the students are of different levels.

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