Review Concept 12.3 Cell Cycle Regulation Stop and Go Signals. In the absence of a go-ahead signal at this check pint, the cell will exit cell cycle. OM G2 G1
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- Question 10 Review Concept 12.3 Cell Cycle Regulation. Match the term and its description. Each term can only be used once. The control of the sequential events of the cell cycle is [Choose ) termed as Where the cell cycle stops until a go-ahead signal is received [ Choose ] Crowded cells will stop dividing because of this mechanism [ Choose | called The spread of cancer cells to other parts of the body, where [ Choose] they may form additional tumors is called >QUESTION 27 Activation of at the metaphase to anaphase transition leads to the activation of APC/C activity. CDC20. CDK. M-Cyclin. Securin.Question 6 Review Concept 12.2 Mitotic phases. Match the term and its description. Each term can only be used once. prophase, prometaphase, metaphase, anaphase and ( Choose ) telophase Nucleoli disappear. Chromatin fibers condense to ( Choose ) chromosomes. Mitotic spindle begins to form. Centrosomes move away from each other. The centrosomes are at the oppsite poles of the cell. [ Choose ) Chromosomes align at the metaphase plate. The kinetochores of the sister chromatids are attached to the kinetochore microtubules. Two daughter nuclei form. Nuclear envelops form. Nucleoli [ Choose ) appear. The chromosomes become less condensed. Spindle microtubules are depolymerized. The division of nucleus is completed. This is the shortest stage of mitosis. Cohesin proteins are ( Choose ) cleaved. Sister chromatids are separated and moved to the two poles. A structure made of microtubules that controls chromosome [ Choose ) movement during mitosis is called >
- Question 7 Which of the folowng statements about an adult animal with a newly-acquired mutation in a somatic cell is true? O Some (but not all) of the animal's offspring wil carry the mutation. OAl d the animal's offspring will carry the mutation. O The animal but not ts offspring, might be affected by the mutation.QUESTION 2 A loss of function of Apaf1, the human equivalent of ced-4 in C. elegans, is most likely to result in which of the following? activation of a developmental pathway found in C. elegans but not in humans a form of cancer in which normal apoptosis fails excess activation of the human version of the ced-3 protease O extensive tissue damage due to excess apoptosisQUESTION 28 Which of the following is the primary method by which cyclin proteins are regulated to influence entry into the cell cycle or transition from one stage to the next? A. Transcriptional upregulation and translation followed by targeted ubiquitin-mediated degradation by a proteasome. B. Phosphorylation to regulate the activity of the kinase site. C. An activating phosphorylation and an inactivating phosphorylation. D. All of these are mechanisms that can be used to regulate cyclins.
- QUESTION 9 How do the two cells formed by a mitotic cell division compare to each other? O A. The two cells formed by a mitotic cell division have different DNA because of the direction the DNA migrated in Anaphase. O B. The two cells formed by a mitotic cell division are different sizes because of the pinching in during Telophase. O C. The two cells formed by a mitotic cell division are identical to each other. The two cells formed by a mitotic cell division are given different amounts of different organelles as the cell divides and this is how different kinds of cells are OD. made. QUESTION 10 How do the two cells formed by a mitotic cell division compare to the original cell O A. The two cells formed by a mitotic cell division are identical to the original cell. O B. The two cells formed by a mitotic cell division are half the size of the original cell. OC. The two cells formed by a mitotic cell division have half the amount of DNA as the original cell. O D. The two cells formed by…Question 42 Which statement is true about mitosis? Page 1 (1E O It is a form of asexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. O It is a form of asexual reproduction resulting in daughter cells that each have one set of chromosomes identical to the parent cell. O l is a form of sexual reproduction resulting in daughter cells that cach have one set of chromosomes identical to the parent cell. O It is a form of sexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. « Previous Next Quiz saved at 9:05am Submit OQuestion 44 Examine the diagram that shows the late stages of telophase during mitosis. Which statement describes what is happening? O The plant cell pinches in half to form two new cells. O The animal cell pinches in half to form two new cells. O The plant cell forms a cell plate dividing the cytoplasm to form two new cells. O The animal cell forms e cell plate dividing the cytoplasm to form Lwo new cells. * Previous ) 耳
- QUESTION 5 Which of the following puts the stages of mitotic cell division in the order that they happen in? anaphase, cytokinesis, interphase, metaphase, prophase, telophase O A. interphase, prophase, metaphase, anaphase, telophase, cytokinesis O B. cytokinesis, prophase, metaphase, anaphase, telophase, interphase O D. interphase, metaphase, anaphase, prophase, telophase, cytokinesis QUESTION 6 What would be the result of a mitotic cell division of a cell with 46 chromosomes? A. a cell with 92 chromosomes B. two cells with 46 chromosomes each C. two cells with 23 chromosomes each D. four cells with 23 chromosomes eachQUESTION 17 Which of the following events describe the mechanism of a cell cycle checkpoint? (choose more than one if applicable) If you really want to challenge yourself, figure out which cell cycle checkpoint is described by each of your choices. Questions about this topic are commonly missed on the unit 3 exam! U A Cdk is phosphorylated, turning it off. This prevents the cell from entering the next phase before it is ready. A ubiquitin ligase is activated to target a Cdk for destruction. Since the Cdk is destroyed, it cannot be active and therefore cannot cause entry into the next phase of the cell cycle. A Cdk inhibitor protein is transcribed and translated when it otherwise wouldn't be, which turns off a Cdk and prevents the cell from entering the next phase before it's ready. A ubiquitin ligase is inhibited, preventing the proteolysis of proteins that must be destroyed in order for the cell to advance to the next step in the cell cycle. One of these proteins that is not destroyed…QUESTION 1 Which of the following statements best describes the mechanism by which the ced-9 protein in the nematode C. elegans prevents apoptosis in normal cells? Active ced-9 prevents activation of ced-3. Ced-9 remains inactive until it is stimulated by ced-3 Ced-9 is cleaved to activate ced-3 O Ced-9 inhibits the cell membrane receptor for the death-signaling molecule.