+ growth pathway signals generally result in elect one: p a. production of cyclin and CDK proteins O b. production of CDK inhibitors O c. phosphorylation of E2F protein o d. dephosphorylation of RB O e. All of the above
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- The decline of MPF activity at the end of mitosis is due to a. an increase in the cell's volume to genome ratio b. the destruction of the protein kinase Cdk c. decreased sythesis of cyclin d. The degradation of cyclinWhen plant cells are in a hypotonic medium, they (a) undergo plasmolysis (b) build up turgor pressure (c) wilt (d) decrease pinocytosis (e) lose water to the environmentExplain how cyclin D-CDK 4/6, Rb and E2F work in the presence of growth factor to get the cell progressing in getting the cell to progress from G1 to S in the cell cycle.
- Activation of M-Cdks requires the activity of _____. a. cyclin b. phophatase c.all of the above d. none of the aboveCytokinesis in plant cells is different from cytokinesis in animal cells because a) a cell plate forms without pinching. b) there are no spindle fibres. c) new cells are made at the terminal bud. d) plants don’t have chromosomes.f you are growing mammalian cells in culture that are in G0, which of the following would you add to the cell culture media to stimulate them to leave G0 and enter the cell cycle? A. growth factors or other growth stimulatory molecules B. Taq polymerase C. Tau D. BrdU E. Na+ ions
- take for example the plant of mung bean and ants as unitary and modular organisms differentiate the two in terms of: a. response to stimuli (mechanism of response and duration of response); and b. growth pattern/development please explain well i will like ur answer1) A group of unspecialized embryonic cells is transplanted from a leg bud to a wing bud in a chick embryos and develops into toes. Which term best describes this phenomenon? A) Differentiation B) Determination C) Induction D) Pattern formation 2) All of the following occur in the light reactions of photosynthesis except the A) Utilization of photons B) Formation of ADP molecules C) Formation of O2 molecules D) Oxidation of water moleculesAfter the initial Actualization of the Cit+ phenotype, there was another alteration to the A-3 genome that resulted in increased growth (e.g. Refinement). What explained the increase in growth rate in response to Refinement? A. Increase number of transporters localized to the plasma membrane. B. Increased ability to metabolize glucose. C. Increased citric acid cycle activity. D. Altered promoter activity resulting in constitutive gene expression.
- If water diffuses into the plant cell, turgor pressure within the cell will_________. A. Increase and the cell will swell B. Decrease and the cell will plasmolyze C. Increase and the cell will experience lysis D. Decrease and the cell will experience lysisDescribe the function of these molecules that help control the cell cycle A.) M-phase promoting factor B.) Cyclin C.) Cyclin dependent kinaseE2F is a transcriptiion factor that activates genes for DNA rep- proteins. In addition with RBR, E2F is one of the controls for G1 to S transition. Why would E2F have a role in totipotyency of plant cells?