Question

1.Induced pluripotent stem (iPS) cells

a.require a donor embryo

b.can differentiate into a greater variety of adult tissues than embryonic stem cells

c.can give rise to all tissues and cell types in the body

d. require a donor egg

2.Embryonic stem cells

a.come from cells harvested from aborted fetuses

b.can grow indefinitely in culture resulting in an ES cell line

c.are multipotent

d.can give rise to all tissues and cell types in the body except germ cells

3.Which of the following statements about cancer is true?

a. Cancers are ultimately due to environmental factors.

b. Chemical carcinogens cause cancer by changing the nucleotide sequence of DNA.

c.Mutations in most cancers occur in the germ line.

d. Mutation in even a single critical gene is sufficient to convert a normal cell into a cancer cell.

4.What is the difference between a malignant tumor and a metastasis?

a. A malignant tumor does not proliferate excessively.

b.A malignant tumor is not able to invade neighboring tissue.

c.A metastasis is a tumor in different distant tissue.

d.A metastasis does not invade surrounding tissue.

Answer 1

1.Induced pluripotent stem (ips) cells can give rise to all tissues and cell types in the body.

under specific conditions ,stem cells can exit from self renewal and differentiate into all tissues and cell types.

option c is correct.

2.Embryonic stem cells can give rise to all tissues except germ cells.

Embryonic stem cells cannot make extra embryonic tissues.

option d is correct.

3.b.Chemical carcinogens cause cancer by changing the neucleotide sequence of DNA.

so option b is correct.

4.Differenve between a malignant tumor and a metasis

c. A metastasis is a tumor in different distant tissues.