Lewin's Genes XII: Chapter 9 Exam Questions With Verified Answers.

Lewin's Genes XII: Chapter 9 Exam Questions With Verified Answers. Apoptosis - answerProgrammed cell death triggered by a cellular stimulus through a signal transduction pathway. Catenate - answerTo link together two circular molecules, as in a chain. Checkpoint - answerA biochemical control mechanism that prevents the cell from progressing from one stage to the next unless specific goals and requirements have been met. Cyclin-dependent kinases - answerSerine-threonine protein kinases that are synthesized in an inactive form and activated by binding a cyclin protein subunit. Cyclins - answerCell cycle-dependent proteins that have no intrinsic enzymatic activity but when bound to an inactive cyclin-dependent kinase can activate it. Dominant gain of function mutation - answerA type of mutation in which the altered product possesses a new molecular function or pattern of gene expression. Doubling time - answerThe period (usually measured in minutes) that it takes for a bacterial cell to reproduce. Epidermal growth factor (EGF) - answerPeptide hormone that binds to EGFR in a lock-and- key type mechanism. Growth factor receptor - answerRecruits the exchange factor SOS to the cell membrane to activate the RAS protein as part of the signal tra