Question

1. Cytokinesis could be blocked if cells are

a. Two of these are true

b. depleted for GTP

c. treated with actin-depolymerizing drugs

d. depleted for kinesin with antibody treatment

2. Research using model organism provides important insights into our understanding of human diseases.what are some specific ways in which model organism research contributes to our understanding of and treatment for human diseases?

a. Drugs targeting proteins implicated in human diseases can be screened for effectiveness in certain model organisms

b. Model organism research can promote the discovery of new genes involved in human diseases

c. Model organism research can be used to develop research methods or technologies that support research into human diseases

d. All of these statements are true

e. Only two of these statements about model organism research are true

3. A mitotic spindle______

a. is formed during S phase of the cell division

b. is essential for aligning the chromosomes to the center of the spindle during prophase.

c. is assembled during prophase of a cell cycle.

d. has two components: astral spindle microtubules and chromosomal spindle fibers.

4. The lymphoid progenitor cells can proliferate to replenish their self and also produce T cell.s B cells and NK cells. The latter three will undergo terminal differentiation. What is the potency of the lymphoid progenitor cells?

a. impotent

b. multipotent

c. pluripotent

d. totipotent

2.

Answer 1

Ans-1- Actin is a protein that is responsible for cell division. If actin polymerization is blocked cytokinesis will not occur.

So option C is correct.

Ans-2- All of these statements are true

Ans-3- the mitotic spindle is needed to align all the chromosomes at the metaphase plate in the center of the cell. it is assembled in prophase of the cells.

option C is correct.

Ans-4- lymphoid progenitor cells make cells of particular lineage not all cells of the body. Hence thy are multipotent.

option B is correct.