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Bella Nat 5

Unit 1 KA 3 Producing New Cells

What is another name for Cell division Mitosis
What is the purpose of Cell division in multi-cellular organisms? To produce new "daughter" cells for growth and repair
What is the purpose of Cell division in single celled organisms? To reproduce
If a cell undergoing mitosis has 6 chromosomes, have many chromosomes will the "daughter" cell have? 6 Chromosomes
What is the Biological word for a cell that is an exact copy of another cell A clone
What is the purpose of Chromosomes They contain information for cells to perform specific functions
Why is it important that when a cell is copied by mitosis that the chromosome number stays constant? So there is a complete set of instructions in the daughter cells
What are the 5 stages of mitosis Interphase, Prophase, Metaphase, Anaphase, Telophase
What happens in Interphase A copy is made of all of the chromosomes in the nucleus
Describe Prophase Chromosomes shorten and thicken becoming visible. Nuclear membrane disappears.
Describe Metaphase Chromosomes line up at the equator of the cell. Spindle fibres appear
Describe Anaphase Spindle fibres pull chromosomes to the poles of the cell
Describe Telophase Nuclear membranes appear round chromosomes at the poles of the cells Cytoplasm begins to divide to form 2 cells
What is a Chromatid? when duplicate chromosomes are touching at the start of mitosis they are called chromatids.
What is the equator of a cell? the imaginary line at the centre of a cell where chromosomes line up at the start of mitosis
What are spindle fibres? The “strings” that pull chromosomes away from the equator during mitosis.
What is the name of the container where cells are grown industrially? A fermenter
What must be controlled in a fermenter to ensure cells grow properly? Temperature, pH, supply of nutrients, supply of Oxygen.
What is liquid growth media called? Broth
What is solid growth media called? Agar
How do you ensure aseptic technique? Keep everything sterile
Created by: nscobie