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- QUESTION 30 Which of the following methods can be used to regulate the activity of cyclin-dependent kinases (CDKs)? A. Phosphorylation at a specific amino acid B. Dephosphorylation at a specific amino acid C. Binding to cyclins D. A, B and C E. A and CQUESTION 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 49 Which of the following is not true/accurate with respect to p53? a. is a tumor-suppressor b. is a transcription factor that promotes transcription of inhibitors of the cell cycle c. is an oncogene d. is named for its molecular mass (in kiloDaltons)
- QUESTION 32 "The cell volume shrinks, cells lose cell-cell contact, the actin cytoskeleton is fragmented, the cell membrane forms blebs, chromatin is chopped into small pieces, and the cell is eventually phagocytosed" is a description of which of the following cell states? A. G0 B. Quiescence C. Mitosis D. Senescence E. ApoptosisQUESTION 20 You are studying the effects of removing integrins from cells. Which of the following abilities is the cell most likely to lose? A The cells are going to lose their ability to make connections with the ECM. B The cells will lose their ability to secrete growth factors. C The cells are going to lose their ability to form cell-cell adhesions. D The cells are going to lose their ability to communicate with the cytoskeleton.QUESTION 35 What event occurs to divide the sister cells in two during cytokinesis? A. Constriction of the cell body by the sliding of myosin filaments on actin filaments. B. Contraction of the cell body by the shortening of actin and myosin filaments. C. Contraction of the cell body by shortening of the microtubules. D. Dissolving of the cytoplasm at the center of the cell body followed by polymerization of new actin filaments.
- QUESTION 12 What is most likely to occur in a cell when the levels of free GTP-bound tubulin subunits are very high in the cytoplasm? A The GTP cap on the end of the microtubules will shrink. B Microtubules will lengthen by adding tubulin subunits to their + ends. C The GTP-bound tubulin subunits will move into the nucleus. D Microtubules will undergo catastrophe and shorten. E Microtubules will lengthen by adding tubulin subunits to their - ends.Question 7 Among the following, which one is trans-acting transcription element? Enhancer Silencer Promoter Transcription factorQUESTION 2 [20]In your own words explain the term “phagocytosis” and discuss the three (3) stages that are involved in the process
- QUESTION 13 Match each of the following to its role in the cell. - A. B. C. D. E. F. G. H. Microtubules - A. B. C. D. E. F. G. H. Actin - A. B. C. D. E. F. G. H. Tubulin - A. B. C. D. E. F. G. H. Intermediate filaments - A. B. C. D. E. F. G. H. Kinesin - A. B. C. D. E. F. G. H. Dynein - A. B. C. D. E. F.…In your opinion, is the nuclear membrane part of the endomembrane system? Why or why not? Defend your answer.What might happen to a cell if there are no steroids in its membrane? plssss help me answer this question, thank you.