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- How do plant and animal cell's cytokinesis differ?How does cytokinesis occur in plant cell?Which of the following are stages in the cytokinesis of animal cells? Select all that apply. A) The cell plate expands along the plane of division, and when the plate fuses with the plasma membrane, the cytoplasm is partitioned into two new cells. B)After telophase, the contractile ring constricts the plasma membrane and forms a cleavage furrow. C)The contractile ring reaches its smallest diameter, and the spindle microtubules are cut as vesicles form the new membranes that separate the two new cells. D)A contractile ring of microfilaments and motor proteins forms under the plasma membrane during anaphase.
- What is the main difference between cytokinesis in plants and animals?Which of the following are stages in the cytokinesis of animal cells? Select all that apply. A) The cell plate expands along the plane of division, and when the plate fuses with the plasma membrane, the cytoplasm is partitioned into two new cells. B) After telophase, the contractile ring constricts the plasma membrane and forms a cleavage furrow. C) The contractile ring reaches its smallest diameter, and the spindle microtubules are cut as vesicles form the new membranes that separate the two new cells. D) A contractile ring of microfilaments and motor proteins forms under the plasma membrane during anaphase.Assessment questionHow does cytokinesis differ in animals and plant cells?
- What are the respective roles of microtubules and actin filaments in cytokinesis?Cytokinesis in plant cells is different than cytokinesis in animal cells. a) Explain why it has to be different, andb) briefly describe the processes in the two different cell types.how does cytokinesis occur in animal cells?
- List and describe the three main types of cytoskeleton. If you wanted to do immunocytochemistry to specifically stain each type of cytoskeleton, what is a protein that could be used for each cytoskeletal type (in other words, what is a unique protein for each cytoskeletal type)? What are three types of actin structures? Describe the involvement of actin structures in cell migration. How is the growth and shrinking of microtubules regulated? Then describe the roles of microtubules in: chromosomal separation during mitosis and the movement of organelles and vesicles within a cell. Describe a possible mechanism on how signaling pathways might impact the cytoskeleton, so that cell migration could be regulated in a localized manner within a multicellular organism. (hint: think about the possible transcriptional regulation of the G-protein regulators) What are 2 main challenges of protein targeting? Then describe one way these challenges are overcome during signal-based targeting and one way…Which of the following are stages in the cytokinesis of animal cells? Select all that apply. After telophase, the contractile ring constricts the plasma membrane and forms a cleavage furrow. A contractile ring of microfilaments and motor proteins forms under the plasma membrane during anaphase. The cell plate expands along the plane of division, and when the plate fuses with the plasma membrane, the cytoplasm is partitioned into two new cells. The contractile ring reaches its smallest diameter, and the spindle microtubules are cut as vesicles form the new membranes that separate the two new cells.Which of the following statements best describes scaffolding proteins? Microtubule arrays that allow lipid-soluble hormones to get from the cell membrane to the nuclear pores Large molecules to which several relay proteins attach to facilitate cascade effects Relay proteins that orient receptors and their ligands in appropriate directions to facilitate complex formation Proteins that enter the nucleus of a cell to regulate transcription