ERIC Number: EJ1134062
Record Type: Journal
Publication Date: 2017
Abstractor: As Provided
Semester-Long Inquiry-Based Molecular Biology Laboratory: Transcriptional Regulation in Yeast
Oelkers, Peter M.
Biochemistry and Molecular Biology Education, v45 n2 p145-151 Mar-Apr 2017
A single semester molecular biology laboratory has been developed in which students design and execute a project examining transcriptional regulation in "Saccharomyces cerevisiae." Three weeks of planning are allocated to developing a hypothesis through literature searches and use of bioinformatics. Common experimental plans address a cell process and how three genes that encode for proteins involved in that process are transcriptionally regulated in response to changing environmental conditions. Planning includes designing oligonucleotides to amplify the putative promoters of the three genes of interest. After the PCR, each product is cloned proximal to ß-galactosidase in a yeast reporter plasmid. Techniques used include agarose electrophoresis, extraction of DNA from agarose, plasmid purification from bacteria, restriction digestion, ligation, and bacterial transformation. This promoter/reporter plasmid is then transformed into yeast. Transformed yeast are cultured in conditions prescribed in the experimental design, lysed and ß-galactosidase activity is measured. The course provides an independent research experience in a group setting. Notebooks are maintained on-line with regular feedback. Projects culminate with the presentation of a poster worth 60% of the grade. Over the last three years, about 65% of students met expectations for experimental design, data acquisition, and analysis.
Descriptors: Laboratory Experiments, Molecular Biology, Active Learning, Inquiry, Student Projects, Student Research, Genetics, Science Process Skills, Scientific Concepts, Scientific Methodology, Scientific Principles, Teaching Methods, Science Education
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
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