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Center for Research on Learning and Teaching
Sample Lesson Plans Continued
80-minute Biology discussion on “prokaryote gene regulation”
2
Goal for student learning:
To identify the structure and regulation mechanism of the lac operon and trp
operon by using a role-play
activity.
Materials:
Lecture and discussion notes.
1. In-class quiz on previous three lectures (5 min).
2. Review and role-play set-up (20 min).
2.1 Review the structure of the lac and trp operon (7 min).
Draw the structure
on the board for refer-
ence and review the biological process and regulation of lac operon.
2.2 Ask the students to come to the board in pairs to complete the figure with important compo-
nent molecules (5 min).
•
If the students can successfully draw the pathway, ask another student to talk through the pathway again.
•
If the students have
difficulty drawing the pathway, the other students or the GSI could help them to figure
out the pathway.
2.3 Review the trp operon mechanism (8 min).
•
Ask students to work in groups of 3-4 people each for 5 min to talk through how
this operon is being regu-
lated while referring to the structure on the board. (Instructions: discuss how the trp operon responds to
environment with/without
tryptophan, what proteins are involved, and how they interact with each other).
•
To debrief, ask someone to talk through the trp operon mechanism (3 min).
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