สารชีวโมเลกุล

1. http://www.tps.ac.th/~narin/basicchem/index_files/page0024.htm

2. http://gotoknow.org/blog/kroonit/157040

3. http://school.obec.go.th/mclschool/6.2.2/L2.htm

4. http://www.trueplookpanya.com/true/examination_display.php?exam_id=247

5. http://www.proprofs.com/quiz-school/story.php?title=sasasasa_20