i CLICKER QUESTIONS [ MIDTERM 1 MATERIAL ]

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Department
Biology
Course
BIOLOGY 151
Professor
Mark Huyler
Semester
Fall

Description
i Clicker Questions: 1) The self renewal signaling pathway in a particular stem cell type has an additional kinase, TK3 that inactivates (dephosphorylates) TK1. TK3 is produced from the expression of a gene activated by TFa. How would TK3 change the behavior of the pathway? A. It would become a temporary circuit, even when signal is present. B. It would become a permanent circuit, even when signal is absent C. It would not change. Careful Words: Temporary -> Circuit is inhibited at TK1 Permanent -> Full cycle, all 4 steps. Circuit. 2) You analyze a stem cell and get the following results. Present? PO4 Signal Present = Receptor Present Y TK1 Present Y TK2 Present
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