i) Why does the concentration of different cyclins vary throughout the cell cycle? ii) Which of the four cyclins shown represents the G1 cyclin? What is the function of this cyclin?
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A:
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- Consider the figure below showing how the concentration of four cyclins (comp A to comp D) vary throughout the cell cycle. Comp B Comp C Comp D Comp A G1 Phase S Phase G2 Phase Mitosis i) Why does the concentration of different cyclins vary throughout the cell cycle? ií) which of the four cyclins shown represents the G1 cyclin? What is the function of this cyclin? Concentration1) What phase of mitosis is this? Answer: 2) What is the indicated structure 1? select one. a. chromosome b. chromosome with two sister chromatids c. centrioles/centrosome d. spindle fibres e. metaphase plate 3)If the diploid (2n) number of this cell is 8 how many chromosomes are present? 4) If the diploid (2n) number of this cell is 8 how many sister chromatids are present? 5) If the diploid (2n) number of this cell is 8 how many homologous pairs are present?The primary function of Asters in mitosis is Select one: O a. The production of microfilaments spindles to separate the two sister chromatids O b. The formation of microfilaments needed to hold chromosomes O C. The formation of microtubule spindles to separate the daughter chromosomes O d. The dissociation of the nuclear envelop O e. Formation of a cleavage furrow
- In order to investigate the cell cycle in HEK293 cells in culture, I ran a flow cytometry experiment. I labeled their nuclei with DAPI to analyze DNA content. In these flow cytometry plots below, label the two main phases of the cell cycle that you can see. Briefly, explain your answer.In what stage of mitosis is the cell labeled "A"? A shutterstock B www.shutterstock.com 159810452 O prophase O telophase anaphase O metaphase1.) Some of the events that occur during mitosis are as follows: 1. separation of sister chromatids to opposite poles 2. condensation of chromatin into compact chromosomes 3. alignment of chromosomes along the cell equator 4. reappearance of nuclear membrane Using the numbers above, match the above-mentioned events occurring during mitosis with the stages in which they occur. Prophase _____ Metaphase _____ Anaphase _____ Telophase 2.) Four different phases that occur during the mitotic phase of cell cycle are as follows: 1. prophase 2. telophase 3. anaphase 4. metaphase The correct order in which phases of the mitotic division occur after G2 phase is __________, _____________, ___________ and ___________.
- Which statement is likely true given the infomation in the diagram? Net1 Cdc20 APC АРС Cdc5/Polo Cdc14 -- Cdc20 APC АРС Hct1 Hct1 Lag Mad2 Cdc20 Hct1 Cdc14 APC APC Incomplete spindle Sict Sic1 В Cdk1-cyclin Anaphase inhibitors Mitotic cyclins S/G2 Metaphase Anaphase Spindle disassembly Cytokinesis DNA re-replication O Cdc5/Polo is a phosphatase. O An overactive, gain of function mutation in Mad2 would cause metaphase arrest. O A overactive, gain of function mutation in Cdc14 would cause prolonged metaphase or metaphase arrest. O The outcome of Cdh1/Hct1 activity is a rapid rise in MPF/M-CdkC activity. H-12 3 4 5 8 9 10 11 12 13 14 15 16 17 18 19 20 22 ху During which phase does cytokinesis begin? What cell parts migrate to the poles during prophase? What structure holds the two chromatids together? What is the overall purpose of mitosis? 21- - da a Lenuar UVIUI IS UIE UI Ue processes that support the Cell theory. Consider Figure 1 as eukaryotic cell and to be referred in this question. Figure 1 a) Based on Figure 1, does the cell represent a gamete cell? Justify your answer. b) State the value of 2n in Figure 1. c) Using a labelled diagram, ilustrates the cell in Figure 1 after t undergoes S stage. d) If cell in Figure 1 experienced a non-disjunction event on its largest chromosomes during meiosis 2, illustrates the probable gametes it produces using a labelled diagram. e) Give the probabity percentage for each type of gamete produced in 2d). f) Does cell division in E col and in human cells serves the same purpose? Justify your answer.
- Draw a diagram of the cell cycle and label the phases. On your diagram: a) For each phase, indicate whether the chromosomes are condensed or not. b) Indicate the phase(s) when it is possible to do a karyotype c) Indicate the phase-transition(s) where the cell would arrest if you add hydroxyurea.6) According to what you have learned about spindle assembly checkpoint and using the following figure A) Which step (A,B, or C) is necessary to allow metaphase to anaphase transition?.. Mad2 АРС/С BubR1 A B) Which protein complex triggers the inactivation of maturation Securin- Separase Cyclin B- Cdk1 Cdk1 separase promoting factor? Cohesin Kinetochore Microtubules Prometaphase Metaphase Anaphase1.What phase of mitosis is this? 2.What is the indicated structure 1? chromosome chromosome with two sister chromatids centrioles/centrosome spindle fibres metaphase plate 3.If the diploid (2n) number of this cell is 8 how many chromosomes are present Answer. 4.If the diploid (2n) number of this cell is 8 how many sister chromatids are present Answer. 5.If the diploid (2n) number of this cell is 8 how many homologous pairs are present Answer.