Describe the role of the following structures or proteins in cell division: a. microtubules b. cohesin protein c. kinetochores d. synaptonemal complex
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- Differentiate between mitotic cell division and meiotic cell division in terms of their products.which of the following events occurs during anaphase B in a mitotic cell a. lengthening of the overlap microtubules b. Shortening of the overlap microtubules c. Shortening of the overlap microtublues d. Shortening of the astral microtubules e. Lengthening of the kinetochore microtubulesWhat are the three types of microtubules involved in the formation of the mitotic spindle? Briefly describe the contribution of each to successful cell division.
- Which of the following is true with respect to cyclins and CDKs? A) CDKs promote progression of the cell cycle, cyclins function to inhibit progression of the cell cycle B) CDKs are the checkpoints in the cell cycle, and when bound to cyclins, they stop progression of the cell cycle C) CDKs will only work to promote progression of the cell cycle when complexed with their designated cyclins D) CDKs are rarely expressed during a cell's cycle, unless cyclins are present to act as transcription factors .What celluar events/processes are associated with G1,S,G2,and M phases of the cell cycle? With the phases of mitosis? Some example: A. DNA replication B. Beginning of mitosis C. Normal cell growth and function D. Breaksdown of nuclear membrane E.Separation of sister chromatids F.Alignment of chromosomes on the equator of the cell H.Triggering the compaction and condensation of chromosomes I. Attachment of microtubles to kinetochoresA cell can normally halt its progression through the cell cycle at different checkpoints. Which of the following best predicts a reason for a cell to halt its progression through the cell cycle between the G1 and the S phases? A B incorrect attachment of spindle fibers to sister chromatids с insufficient accumulation of nucleotides D mitosis-facilitating enzymes have not been synthesized errors in DNA replication during G1
- Describe the three main classes of spindle microtubules in animal cells and what their functions are during mitosis?Scientists in the lab have isolated a substance that prevents cells from synthesizing spindle fibres. What is this substance and how would this substance affect cell division?create a Venn diagram of the following types of cell division processes: mitosis, meiosis, and binary fission.
- 1. Mitosis: a. Are the chromosomes at each pole during telophase identical to chromosomes in the original cell (prior to S phase of cell cycle)? b. Are the new daughter cells genetically identical to the original cell? c. Does crossing over occur in mitosis? Explain.What are the functionalroles of the mitotic spindle in an animal cell? Explain how thesefunctions are related to the three types of microtubules: aster, polar,and kinetochore microtubules.