stem cells Flashcards
1
Q
define a stem cell
A
an undifferentiated cell that can specialise and develope into new cells
2
Q
why do STEM cells become specilaised
A
only become specilised becuase specific genes are expressed and transcribed by mrna
3
Q
what are the types of STEM cells
A
- totipotent
- pluripotent
- multipotent
- unipotent
4
Q
what is a totipotency
A
where stem cells can specilise into any cell
- found in embryos of humans
5
Q
what is a pluripotent stem cell
A
can specilise into most cells except some placenta cells
6
Q
what is a multipotent stem cell
A
can only specilise into certain cells such as red blood cells
- found in the bone marrow
7
Q
what is a unipotent stem cells
A
can only specilise into one type of cell
8
Q
what are ips
A
reprogramed adult body cells to become pluripotent
9
Q
suggest how transcriptional factors can reprogramme cells to form ips cells
A
- transcriptional factor binds to dna
- stimulate binding of rna polymerase enabling translation
