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Unformatted text preview: J: -PrY1 It-r 1. Atwhat stage of mitosis are chromosomes seen to decondense? A;;Prophase-S. Teleophase C: Metaphase ...2.Astral microtubules of the mitotic spindle function to pull Chromosomesduring mitosis A.True--SoFalse 3. How many centrioles does a cell have at metaphase? ...A.2 . B.4 C.S- b.8 4.. Klnetochores attach to the minus end of microtubules and contain motor protein complexes-A. True B.False 5. What Is the primary function of catastrophins? A. protection of the cytoskeleton B. straightening mlcrotubules.-C. destabilization of microtubules S. Microtubule polymerizatfonldepolymerizatlon is more dynamic during Interphase A.True s. False A. Which of the following best describes the directional growth of microtubules from the cen~ome.during mitosis? A. mostly towards the kinetoc~ores B. mostly towards the chromosomes C. random-8. The alignment of chromosomes at the metaphase plate is due to the opposing forces created by actin filaments from opposite.. poles of the cell. A.True "8. False--9.Activation of the Anaphase Promoting Complex (APC) is under controlof cyclins . "A. True B. False 10. What tenTHsused to desCribethe structure seen in the cell membrane 81the beginning ofvestcle formation?-A. a coated pit B. a dental Co a plnecyte 11. The $Ignal Recognition Particle (SRP) binds to A. Tt1ehydrophillc signal sequence of an emerging polypeptide "from the ribosome /' B. The SRP receptor only .fi. The hydrophobic signal sequence of an emerging. polypeptide from the ribosome and the SRP receptor 12. In cell biology, a vesicle refers to--A..a membrane bound structure in the cytoplasm B. a membrane bound structure in the cytoplasm that only contains enzymes C. a membrane bound structure In the cytoplasm that only . contains lipids BIO 321 Exam 4 fall 2003 P~e 1...
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