t opic 1: c ell b iology 1.6 cell division sd41.k12.id.us
TRANSCRIPT
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TOPIC 1: CELL BIOLOGY1.6 Cell division
sd41.k12.id.us
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1 - INTERPHASERead & Consider 1.6.4-1.6.5
• What do you know?• What questions do you have?• Based on the graphic above, how much of a
cell’s life is spent in interphase?
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INTERPHASE
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The cell carries out specialized functions as well as several metabolic reactions. It consists of three phases: Gap 1 (G1), Synthesis (S), and Gap 2 (G2). Interphase Activities:
Active cytoplasm of a growing cellNew organelles formed (mitochondria, chloroplasts, etc.
Enzymes produced for S phaseDNA is copiedIncrease in histone production.Increase in microtubule production.
INTERPHASE
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CYC
LIN
S – C
ON
TR
OLLIN
G T
HE C
ELL
CYC
LE
Cyclins are proteins that interact with CDKs (cyclin-dependent kinase) to form enzymes that control cell cycle.
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2 - MITOSISRead & Consider 1.6.1-1.6.3
• What do you know?• What questions do you have?• What is the result of mitosis?
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DNA TERMINOLOGY
Chromosome/Chromatid – single DNA molecule
Sister chromatid – two identical DNA molecules attached by a centromere This attachment helps to organize genetic material
within the cell.
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ORGANIZING DNA
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MITOSIS & CYTOKINESIS
Mitosis: division of the nucleus followed by cytokinesis, the division of the cytoplasm.
1. Describe, in detail, the events of each phase of mitosis.
2. Draw a labeled diagram of each phase.Hoover.k12.al.us
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PROPHASE
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METAPHASE
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ANAPHASE
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TELOPHASE
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CYTOKINESIS
In a plant cell.
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Draw a graph to indicate the amount of DNA in a cell over time.
DN
A
Time
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CELL CYCLE STAGE IDENTIFICATION
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ONION ROOT – MITOTIC INDEX
You will classify each cell based on what
phase it is in. At the end you will count up the cells found in each
phase and use those numbers to determine
the mitotic index = % of cells found in mitosis.
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3 - CANCERRead & Consider 1.6.6
• What do you know?• What questions do you have?• How has your life been impacted by cancer?
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TUMORS
Primary Tumor – tumor found in the original tissue.
Secondary Tumor – tumor that has migrated to other tissues via metastasis.
Breast cancer tumor – hyscience.comCancer Behavior
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CAUSES
They can occur in any tissue. Triggered by:MutagensOncogenes
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SMOKING & CANCER
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WORKS CITED "Cancer Cell Has Potential On-off Switch - Medicure
Medical Travels LLP." Medicure Medical Travels LLP. N.p., n.d. Web. 01 Aug. 2014.
C, Cindy. "Anatomy & Physiology 2401 Kandeh Flashcards The Stages of the Cell Cycle | StudyBlue." StudyBlue. N.p., 14 Feb. 2013. Web. 31 July 2014.
"Mitosis." BiologyEOC -. N.p., n.d. Web. 31 July 2014. "Onion Root Tip (Allium) Showing Cells in Various Stages
of Mitosis. LM X100." - 42-29390593. Corbis Images, n.d. Web. 01 Aug. 2014.
Piatt. "Mitosis Phases and Cell Cycle - Chapter 8 Matching." Quia -. Chilarol Area High School, n.d. Web. 31 July 2014.
Walpole, Benda. Biology for the IB Diploma. Second ed. United Kingdom: Cambridge UP, 2014. Print.