Producing New Cells 1.3 Flashcards
Why is cell division vital to living things?
Increases the number of its cells
In multicellular organisms it allows an an individual to replace dead cells
It’s a method of asexual reproduction
What are the two ways of thinking about growth?
Increase in size
Increase in cell numbers
What do parent cells make?
Daughter cells
Describe the events of cell division
Equal division of nucleus
Equal division of cytoplasm
Membrane firms across cell
What takes the longest time?
The growth of daughter cells
What takes the least amount of time in the cell cycle
Division of cytoplasm
What is stage 1 of mitosis
Nucleus becomes larger
Visible threads of chromosome appear
The nuclear membrane breaks down
Stage 2 of mitosis
Spindle appears (protein) The chromosomes line up across the EQUATOR
Stage 3 of mitosis
The centrimeres divide
They repel so the chromotids do to separate poles
Stage 4 of mitosis
Spindle breaks down
The separated chromosomes gather at poles and surrounded by nuclear membranes
They uncoils and become invisible again
What happens after mitosis
The cytoplasm divides
Then the daughter cell grows to be the same size as the parent cell
Why are protiens important in genetic information?
They make up much of the structure of the cell
Enzymes are protiens and they control the metabolism of the cell
What kind of organisms do u grow?
Micro organisms
List features of good aseptic technique
Hands washed before and after experiment to remove microorganism
Work surfaces cleaned with disinfectant
Wire loops flamed to sterilise them
Sterile Perry dishes kept closed until required
Inoculated dishes sealed
Factors of optimum growth
Temperature
Oxygen
Ph
