s growths C) alteration of protein kinases in cell cycle regulation in order to
ID: 209070 • Letter: S
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s growths C) alteration of protein kinases in cell cycle regulation in order to slow cancer growth arm lon uptake into the cytoplasm in order to modulate the effects of environmental E) increase in the concentration of in order to produce more AMP Use this description to answer the following questions group of G protein-coupled receptors contains seven transmembrane a helices. The amino end of the proberin lies at exterior of the plasma membrane. Loops of amino acids connect the belices either at the exterior face or on the cytosol tace of the membrane. The loop on the cytosol side between helices 5 and 6 is usually substantially longer than the others. 8) 8) If you wish to design an experiment to block the G protein-coupled receptor interaction, the block would preferentially affect which of the following? ) the amino acid sequence in the binding site for the G protein B) the cytosolic end of the receptor C) the exterior (cytoplasmic) end of the receptor D) the phospholipid's transmembrane domairn E) the amino acids in the binding site for the transduction molecules 9) Which of the following best describes how chromosomes move toward the poles of the spindle 9) during mitosis? A) The chromosomes are "reeled in" by the contraction of spindle microtubules, motor proteins of the kinetochores move the chromosomes along the spindle microtubules, and nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles. B) The chromosomes are "reeled in" by the contraction of spindle microtubules. C) The chromosomes are reeled in" by the contraction of spindle microtubules, and motor proteins of the kinetochores move the chromosomes along the spindle microtubules. D) Motor proteins of the kinetochores move the chromosomes along the spindle microtibules. E) Nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles 10) 10) What causes the decrease in the amount of cyclin at a specific point in the cell cycle? A) the binding of PDGF to receptors on the cell surface B) an increase in production once the restriction point is passed C) the changing ratio of cytoplasm to genome D) the cascade of increased production once its protein is phosphorylated by Cdk E) its destruction by a process initiated by the activity of its complex with a cyclisn 11) Which of the following is true concerning cancer cells? A) They are not subject to cell cycle controls B) They do not exhibit density-dependent inhibition when growing in culture C) When they stop dividing, they do so at random points in the cell cycle, and they are not subject to cell cycle controls cell cycle controls; and they do not exhibit density-dependent inhibition when growing in culture. D) When they stop dividing, they do so at random points in the cell cycle; they are not subject to E) When they stop dividing, they do so at random points in the cell cycleExplanation / Answer
8.G-coupled receptor protein are important signaling molecule involved in some types of response like hormones(Epinephrine) and sites for taste,smell etc.The block preferrently bind with the transmembrane domain of the protein as ligands bind with the transmembrane domain of Protein.
9.Chromosome move towards their opposite poles due the contraction of spindle microtubule and motor proteins of the kinetochore moves the chromosome along the spindle microtubules.
10.Cyclin control the cell cycle at every step and they are actually CDKs (cyclin dependent kinases).By binding of CDK to their cyclin, activating the CDK and phosphorylate other molecule.so option (c) is correct.
11.Cancers cells show the property of unlimited cell division and don't exhibit density dependent inhibition during culture and they also not under the control of cell cycle.Hence option (C) is correct.
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