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MGCCC-JD BIO 1 Mitosis (study questions) Study Set Exam
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MGCCC-JD BIO 1 Mitosis (studyquestions) Study Set Exam
explain the significance / importance of non-sex cell division - Answer It provides equal
qualitative and quantitative distribution of genetic material in 2 daughter cells,
maintains uniformity and stability of the genetic material from cell to cell
describe the stages of interphase and the events occurring during each stage: - Answer
G1-1st interval or gap of cell growth; Metabolic; before DNA replication.
S- time of synthesis; Preparing to divide; (DNA replication).
G2- 2nd interval; protein making to drive cell division; when cell prepares to divide.
list the stages of mitosis in order - Answer Prophase, Metaphase, Anaphase, Telophase.
describe how mitosis maintains the diploid number of chromosomes: - Answer
explain the events that occur during each stage of mitosis: - Answer Prophase -
chromatin forms chromosomes; nucleus disappears (nucleolus and nuclear envelope
disappear); centrioles migrate to poles of cell; Spindle fibers form
Metaphase - Spindle fibers attach to chromosomes at centromeres; chromosomes are
lined up in the center of the cell
Anaphase - Sister chromatids are pulled apart by the spindle fibers
Telophase - Chromosomes uncoil; spindle fibers break down; nucleus reappears
explain the function of telomere: - Answer Protects chromosomes from degradation and
end to end fusion. Act as a sentinel for DNA damage. Act as a substrate for telomerase.
explain the cytokinesis of a cell without a cell wall: - Answer 1) Mitosis completed,
spindle begins to disassemble. 2) Midpoint of former spindle, ring of actin & myosin
filaments attach to plasma membrane contracts. 3) Contractile ring pulls cell surface
inward as it shrinks. 4) Ring contracts until it pinches the cell in two.
explain the cytokinesis of a plant cell: - Answer Future plane of division established
before mitosis began. Vesicles cluster here when mitosis ends. 2) As vesicles fuse with
each other, they form a cell plate along the plane of division. 3) Cell plate expands
outward along plane of division. When it reaches the plasma membrane it attaches to
the membrane & partitions the cytoplasm. 4) Cell plate matures as two new cell
walls-join with parent cell wall-each dependent cell becomes enclosed by its own cell
wall.
Mitosis and Cytoplasmic division function in________? - Answer asexual reproduction of
single-celled eukaryotes and growth and tissue repair in multi celled species.
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