Cell BiologyMitosis, DNA, RNA
Mitosis (Cell Reproduction) This is the process of cell division resulting
in the production of 2 daughter cells from a single parent cell.
The daughter cells are identical to one another and to the parent cell.
Happens during growth or repair.
Mitosis is divided into 4 main stages: P M A Trophase etaphase naphase elophase
Prophase n Metaphase1) Prophase
Chromosomes are duplicated (become 2 sisters)
2) Metaphase (Middle phase) Chromosomes are aligned in the middle of the
cell
Anaphase and Telophase3) Anaphase
The paired chromosomes separate and move to the opposite sides of the cell.
4) Telophase Cell membrane pinches inwards, forming two
daughter cells
Mitosis Video clips
Mitosis TPRs
http://www.youtube.com/watch?feature=player_detailpage&v=3kpR5RSJ7SA
http://www.cellsalive.com/mitosis.htm
Has a LARGE vacuole Has small vacuoles
Has a CELL WALL Does NOT have a cell wall
Has a rectangular shape Has a oval shape
Which set of drawing shows what happens to cells in plant root tips during growth?
DNA and RNA Is the hereditary material in all organisms
located in the cell nucleus. Information in DNA is stored in 4 bases:
A – Adenine T – Thymine C – Cytosine G – Guanine
A and T always form a base unit (AT & T)C and G form another base unit
DNA video clip http://learn.genetics.utah.edu/content/begi
n/tour/
Remember A always pairs with T C and G go together
Remember AT & T, C with G
G T T C
Remember AT & T, C with G
G T T C
T C A A G
3’ AGTTC 5’
Now for RNA RNA is similar to DNA except that ‘T’ is replaced
by ‘U’ or Uracil. To convert DNA to RNA Step 1: Replace C with G, G with C, A with T and T
with A. Step 2: Replace only ‘T’ with ‘U’
What is the RNA molecule coded from the DNA molecule ATGCGC?
Step 1T A C GCGU A C G C G Step 2
Find the RNA moleculeFor the DNA molecule
http://www.youtube.com/watch?v=vJSmZ3DsntU
A G T T CStep 1
Step 2 A G U U C
Review Mitosis
Prophase, Metaphase, Anaphase and Telophase
Difference between Animal and Plant cells
RNA transcription
Complete the worksheet on Mitosis and DNA