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39 Cards in this Set

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  • Back

T or F Cells grow indefinitely.
If true, then how do they accomplish this? If false, then what do they do?
Identify 3 reasons why the above occurs.
DNA overload…slow diffusion…volume vs. surface area
What is the product of cell division?
2 new daughter cells
What must copy itself before dividing?
This process is called _____________________.
Compare and contrast mitosis with cytokinesis.
both involve a division of cell parts…mitosis is nuclear division and cytokinesis is cytoplasm division
Spaghetti is to pasta as __________ is to DNA.
“X-shaped” DNA in dividing cells are __________________.
T or F More complex organisms have more chromosomes.
Identical strands of DNA attached after duplication are called ______________________.
sister chromatids
Identify the attachment point of these replicated chromosomes.
How many distinct phases make up the cell cycle?
Place the phases in order of their occurrence.
G1, S, G2, M
The end of one cell division to the beginning of the next is called _______________________.
How many of the distinct phases make-up this overall cell event?
Identify the main thing that occurs during each of the events above.
G1 = cell growth…S = DNA replication…G2 = organelles for mitosis made
The dividing nucleus is called __________________.
How many distinct phases make up this major part of the cell cycle?
Identify and order these phases.
prophase, metaphase, anaphase, telophase
What main thing happens during each phase?
prophase = centrioles move to poles and attach spindles, metaphase = sister chromatids align in middle of cell, anaphase = separation of sister chromatids, telophase = chromosomes uncoil into chromatin as nuclear envelopes develop and cytokinesis begins
What happens during cytokinesis?
cell membrane pinches inward dividing cytoplasm
Contrast animal and plant cells regarding cytokinesis.
animals = membrane pinches inward…plant = cell plate forms from which wall and membrane come
T or F Cell cycle rates are different for different cell types.
Identify 2 cell types that don’t divide.
muscle, nerve, red blood cells once made don’t divide
What inhibits cell growth when a petri dish is used?
contact with wall of dish or each other
Identify the first protein discovered that regulated the cell cycle.
Compare and contrast regular cells with cancer cells.
both are dividing cells…regular cells have interphase while cancer cells continually divide
A cell mass that damages surrounding tissues is called a ___________________
Compare and contrast benign and malignant cancer cells.
both are cancer cell types…malignant cells break free and spread cancer to other body areas
What gene is damaged or defective that is often the cause of cells not responding to normal control signals?
All different cell types of any organism comes from how many cells?
What does it mean when a cell “differentiates”?
specializes to perform a specific function
What type of cells can develop into most any body type of cell?
stem cells
Which has greater differentiation capabilities…embryonic or adult cells?
embryonic stem cells
What is the advantage of the type of cells mentioned above?
potential re-growth or repair of damaged organ tissues