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