Once transduction of a signal is complete, the receptor and its bound signaling molecule are removed from the cell
surface by ____.
a. hydrolysis
b. diffusion
c. endocytosis
d. pinocytosis
e. exocytosis
ANSWER: c
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The fluid nature of the membranes is attributed to a lateral movement of
A. protein channels. B. phospholipid molecules. C. antigen molecules. D. pumps such as the proton pump. E. the entire lipid bilayer.
Chromatin remodeling
a. is subject to well-characterized stages of regulation by the cell. b. blocks access to genes that should not be expressed in a particular cell. c. is unaffected by alterations to the DNA sequences of a cell. d. results in specific patterns of gene expression. e. is generally independent of histone protein arrangements.
Which statement is true?
a. Chromatin remodeling changes the order of genes between histones. b. Chromatin remodeling becomes permanent when inherited. c. DNA methylation and chromatin remodeling can cause cancer. d. DNA methylation and chromatin remodeling are independent processes.
Which hypersensitivity disorder is the result of cell-mediated response?
A. type I B. type II C. type III D. type IV E. both type I and II