Lecture 26 Summary

Question 1

Cells become more _____ and less _____ during _______, except for stem cells and germ cells

Answer 1

• Cells become more specialised and less flexible during embryo development, except for stem cells and germ cells

Question 2

Regulartory protieins can…

Answer 2

Activate certain genes and shut down others by interacting with non-coding DNA

Question 3

Once a cell has differentiated, it __________ to other cell types when it divides, although _____ DNA ____lost

Answer 3

Once a cell has differentiated, it can not give rise to other cell types when it divides, even though no DNA has been lost

Question 4

Stem cells are different because

Answer 4

They can still give rise to multiple cell types on cell division

Question 5

_____ often act to replace growing or worn out tissues by __________to produce__________

Answer 5

Adult stem cells often act to replace growing or worn out tissues by dividing continuously throughout life to produce one to a few different types of new differentiating cells

Question 6

Pluripotent

Answer 6

• embryoinic stem cells are pluripotent
• they can give rise to any cell type in the organism if given tight instructional cues

Question 7

Stem cells can be ______ with _____ to fix genetic diseases in patients, as the correcting are ___________

Answer 7

Stem cells can be edited or used with gene therapy to fix genetic disease in patients as the corrections in the DNA are passed on to all daughter cells

Question 8

Stem cells can be used to

Answer 8

Create genetically identical or immune- compatible tissues for transplants