While studying for a pharmacology test, a student asks his peers ...

[kaid0807]

While studying for a pharmacology test, a student asks his peers about interferons. What statement about interferons is accurate?
 
  A) They stimulate B-lymphocyte activity.
  B) They interfere with multiplication of stem cells.
  C) They stimulate growth and differentiation of lymphoid cells into lymphocytes.
  D) They interfere with the ability of viruses in infected cells to replicate.

Question 2

Two types of ribosomes exist within a cell. Ribosomes that are not bound to the endoplasmic reticulum exist throughout the cytoplasm of the cell and produce proteins with what purpose?
 
  A) Bind themselves to the Golgi apparatus
  B) Bind to produce the endoplasmic reticulum
  C) Denature unnecessary enzymes within the cell
  D) Contribute to the structure of the cell

[braelync]

Answer to Question 1

D
Feedback:
Interferons are substances naturally produced and released by human cells that have been invaded by viruses. They may also be released from cells in response to other stimuli, such as cytotoxic T-cell activity. Interferons do not stimulate B-lymphocyte activity, interfere with multiplication of stem cells, nor do they stimulate growth and differentiation of lymphoid cells into lymphocytes.

Answer to Question 2

D
Feedback:
Ribosomes that are not bound to the surface of the endoplasmic reticulum exist throughout the cytoplasm. These free-floating ribosomes produce proteins that are important to the structure of the cell and some of the enzymes that are necessary for cellular activity. Free-floating ribosomes do not bind themselves to Golgi apparatus; produce endoplasmic reticulum; or denature any part of the cell or its contents.