The Cell Cycle, Mitosis, And Cell Signaling
. The abilty of aorganisms to reproduce best distinguisehes living things from non living matter.
- 1.Anaphase: Sister chromatids separate at the centromeres. Daughter chromosomed are moved to opposite poles of the cell. Motor proteins move the chromosomes along the spindle microtubules. kinetochore microtubules shorten. The cell elongates due to lengthening of nonkinetochore microtubules.
- 2.The continuity of life is based on the reproduction of cells, or __________
- 3.Living Organisms are reproduced by two methods. ___________. Offspring are identical to the original cell or organism. Involves inheritance of all genes from one parent clone.___________. Offspring are similar to parents, but show variations in traits. Involves inheritance of unique sets of genes from two parents.
- 4.A______ is a group of genetically identical individuals from the same parent.
- 5.Binary Fission. "______ ___ ______"
- 6.Binary fission occurs in_______ ________. Two_____ cells arise from ______ cell.
- 7.In Unicellular organisms, division of one cell _______ the entire organism.
- 8.Multicellular organisms depend on cell division for: Development from a fertalized cell, growth, repair.
- A.
True
- B.
False
- 9.Cell divion is an integral part of the______. the life of the a cell from formation to its own division.
- A.
Eukarytoic species
- B.
Cell cycle
- C.
Centrome
- 10.Most cell division_____ results in daughter cells with identical genetic information, DNA
- A.
Mitosis
- B.
Meiosis
- C.
Gametes
- 11.A special type of divison ______ produces non identical daughter cells (gametes, or sperm, and egg cells.
- 12.Eukaryotic chromosomes are composed of ______.
- A.
Gametes
- B.
Centrome
- C.
Chromatin
- 13.Every eukaryotic species has a characteristic number of chromosomes in each cell nucleus. ______ ______. (non reproductive cells_ have two sets of chromosomes. ________. (reproductive cells: sperm and egsg) have half as many chromosomes are somatic cells.
- 14.The cell cycle is an ordered sequence of events for cell division. it consists of two stages.________, and ________ _______.
- 15.Interphase: duplication of cell contents
- A.
G1-growth, increase in cytoplam.... S-duplication of chromosomes....G2-growth,preparation for division
- B.
G1-growth, increase in cytoplam,..... G2-growth,preparation for division... sister chromatids.
- C.
G2-growth,preparation for division.... prohase....S-duplication of chromosomes
- 16.Mitosis progresses through a series of stages: Prophase, Prometaphase, metaphase , Anaphase
- A.
True
- B.
False
- 17.Interphase in the cytoplam contains what?
- A.
Cytoplasmic contents double, Two centromsomes
- B.
Cytoplasmic contents double, Chromosomes duplicate during the S phase.
- C.
Cytoplasmic contents double, Nucleoli, sites of ribosome assembly, are visible.
- 18.Interphase in the nucleus.
- A.
Cytoplasmic contents double, Chromosomes duplicate during the S phase.
- B.
Chromosomes duplicate during the S phase, Nucleoli, sites of ribosome assembly, are visible.
- C.
Chromosomes duplicate during the S phase, Cytoplasmic contents double,
- 19.How many cells are available by the end of interphase
- A.
92
- B.
23
- C.
46
- 20.How many chromosomes are present in one cell?
- A.
46
- B.
23
- C.
92
- 21.How many chromatids are present in one cell
- A.
46
- B.
92
- C.
23
- 22.Prophase: In the ________, microtubules begin to emerge from centrosomes, forming the spindle.
- 23.Prophase: In the _______, chromosomes coil and become compact, and the nucleoli dissappear.
- 24.The _____ _______ is am apparatus of microtubles that controls chromosomes movement during mitosis.
- 25.During prophase, assembly of spindle microtubules begins in the _________, the microtuble organizing center.
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