Which of the following responses is NOT a part of the B cell activation?
A) T helper cells release interleukins.
B) Antigen is engulfed and digested to be presented on the B cell surface.
C) T helper cells recognize the antigen through T cell receptor and MHC proteins.
D) Interleukins stimulate B cells to divide.
E) Antigen presented by macrophages binds to IgM on the B cell surface.
Ans: E) Antigen presented by macrophages binds to IgM on the B cell surface.
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The zone of soil that surrounds the roots and contains a variety of organic exudates is called the
A. mycorrhizae. B. rootsphere. C. rhizosphere. D. geosmin.
What happens if a G1 cell sustains genetic damage?
a) The p53 protein concentration rises very rapidly. b) All of the choices are correct. c) The p53 protein exhibits an increase in stability. d) There is no increased expression of the p53 gene.
Which of the following has the LEAST effect on blood pressure in a young adult?
a. Temperature of the room b. Position of the body c. Level of conditioning d. Supplemental vitamins
An expert in ________ would be the best person to consult about cleaning soil contaminated with carcinogenic compounds, while the production of human proteins (e.g., insulin) by genetically engineered microorganisms is an example of ________
a. industrial microbiology / phylogeny b. phylogeny / bioremediation c. biotechnology / industrial microbiology d. bioremediation / biotechnology