Gene Expression

Question 1

Define totipotent stem cells.

Answer 1

Totipotent cells are unspecialised cells that are capable of expressing ALL genes.

Question 2

Define pulripotent stem cells.

Answer 2

Pluripotent cells can express most but not all genes.

Question 3

Define multipotant stem cells.

Answer 3

Multipotent cells are able to express a limited about of genes.

Question 4

Define unipotent stem cells.

Answer 4

Unipotent cells are the final specialised cell and expressed genes.

Question 5

What are housekeeper genes?

Answer 5

Genes that’s are always expressed and are essential for processes in the cell.

Question 6

6. NOT FINDISgED
   a) Explain how oestrogen enables Ra polymerase to transcribe it’s started gene.

Answer 6

1. Oestrogen diffuses through cell membrane;
   Mp2. Attached to ERa receptor
   mp3. ERa receptor changes shape;
   Mp4. ERa receptor leaves protein complex which inhibited its action
   Mp . Oestrogen receptor binds to tar