BioChemistry > EXAM REVIEW > Biol 101. Individual Assignment 3 - 10 Discoveries in the War on Cancer (All)

Biol 101. Individual Assignment 3 - 10 Discoveries in the War on Cancer

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1. (B) Biochemists have discovered a protein kinase enzyme named BRAF that is an important link in a molecular pathway that causes a cell to divide. Normally, BRAF responds to signals coming from ou... tside the cell—signals calling for the cell to divide normally under normal conditions. But there is a mutation in BRAF enzymes that causes it to activate the cell toward division continually. In this way it gives rise to melanomas and thyroid or ovarian cancers. Biochemists have also found a drug, vemurafenib, which binds selectively to mutant BRAF totally inactivating it. Cells that have inactivated BRAF undergo apoptosis—a process that leads to cell death. 2. (A) Biochemists are analyzing the many, many components of red meat (beef and pork) to determine which component, if any, will cause increased colorectal cancer rates in mice when the component is administered orally. Studies have shown that higher colorectal cancer rates in humans are associated with higher consumption rates of red meat [Show More]

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