Most of cell's DNA isn't translated

Question 1

What are the key properties of stem cells?

Answer 1

Stem cells have the ability to divide and replicate and also have potency which is the ability to become specialised.

Question 2

What is meant by totipotent?

Answer 2

Totipotent cells can divide and differentiate into any type of body cell. They only occur for a very limited time in the early mammalian embryos and during development, totipotent cells translate only part of the DNA while results in cell specialisation.

Question 3

What is meant by pluriopotent?

Answer 3

Pluriopotent cells are descendants of totipotent cells and can differentiate into any type of body cell except those that make up the placenta

Question 4

What is meant by multipotent?

Answer 4

Multipotent cells can differentiate into a limited number of types of body cell.

Question 5

What is meant by unipotent?

Answer 5

Unipotent cells can differentiate into only 1 type of cell.

Question 6

What is the importance of pluripotent stem cells?

Answer 6

Pluripotent stem cells can divide in unlimited numbers and can be used to treat human disorders.

Question 7

What is the importance of unipotent stem cells?

Answer 7

Unipotent cardiomyocytes could develop into new heart tissues. Recent research has shown that cardiomyocytes do have regenerative capabilities.

Question 8

What are two issues surrounding the use of stem cells?

Answer 8

Ethical issues: an embryo has the ability to form a human. Also, stem cells may multiply out of control in the body forming tumours.