ASU BIO 181 Exam 1

Actin Filaments are present in: - Answer-The cell's cortex Microtubules are present in: - Answer-The cell's interior Cytokinesis in plant and animal cells takes two forms: - Answer-Animal: Contractile Ring Formation Plant: Phragmoplast Formation An important checkpoint regulator is at the Gap 2/M-phase transition. Here, Cyclin B and cdkl1 activate and form MPF which becomes a _____ _____ and causes DNA to condense into _____. - Answer-Histone Kinase Chromosomes The _____ begins to be destroyed at the Metaphase of the cell cycle causing the chromosomes to begin to _____. - Answer-Cyclin B1 Decondense The activation of both MPF and MAPK result in _____ _____ of the cytoplasm during M-phase. - Answer-Settling down MAPK has two different functions depending on where this Kinase acts in the _____ _____. If the Kinase becomes active during interphase, the cell is triggered to progress through the _____ _____. - Answer-Cell cycle Cell cycle Two types of second messengers discussed in lecture can exist downstream of a plasma membrane receptor. These are _____ and _____. - Answer-Cyclic AMP MAP Kinase There are two basic forms of cytoplasmic signaling (i.e signal transduction). One uses _____ and the other uses _____. - Answer-Protein Kinases Calcium Signal What is the difference between a single-pass transmembrane protein and a 7-pass transmembrane protein? - Answer-A single pass TMP is a singular protein that passes once through the bilayer. A 7-pass protein passes through the bilayer 7 times, creating a channel for ions to pass through. A single pass TMP cannot create an ion channel. Is a cancer cell anchorage independent and immortal, or is it anchorage dependent and mortal? Do they exhibit contact inhibition? - Answer-They are anchorage independent and immortal, and they do not exhibit contact inhibition, because they continue to grow despite their surroundings.