Cell Bio Exam 1

Question 1

Which are the tenets of the Cell Theory?

Answer 1

1) All organisms are composed of one or more cells
2) The cell is the structural unit of life
3) Cells can arise only by division from a preexisting cell

Question 2

Which of the following description of embryonic stem cells is wrong?
They are undifferentiated cells
They are capable of self-renewal
They are capable of giving rise to other kind of cells
They can differentiate into only two or several mature cell types.
They can be used for the cell replacement therapy.

Answer 2

They can differentiate into only two or several mature cell types.

Question 3

The process by which a relatively unspecialized cell becomes highly specialized is called

Answer 3

differentiation

Question 4

Which property of the plasma membrane enables H2O to pass through, but glucose cannot?

Answer 4

Providing a selectively permeable barrier

Question 5

What are the determinants of diffusion rate for a nonelectrolyte diffusion procedure?

Answer 5

A concentration gradient

Size of the nonelectrolyte molecule

Question 6

An artificially-prepared spherical vesicle compose of a lipid bilayer is referred as:

Answer 6

Liposome

Question 7

An important mechanism of transportation by transporter proteins is through

Answer 7

conformational change