Explain how chromatin remodeling can involve changes to DNA instead of histones
What will be an ideal response?
The addition of methyl groups to cytosine bases in the DNA of promoters turns genes off by a process called gene silencing. The presence of methyl groups may prevent the binding of transcriptional proteins to the gene, and methylated DNA binds to non-histone proteins that promote the formation of genetically inactive chromatin, termed silent chromatin.
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All of the following are true of hypertension
EXCEPT
a. it may be caused by diet. b. it usually develops after a person has a stroke. c. it may be genetic. d. it refers to chronically high blood pressure. e. it usually does not have any symptoms
If you skip a meal, which of the following conditions would prevail?
a. Only insulin levels would rise. b. Only glucagon levels would rise. c. Glycogen would be converted to glucose. d. Insulin levels would rise, and glycogen would be converted to glucose. e. Glucagon levels would rise, and glycogen would be converted to glucose.
The exocrine function of the pancreas produces:
A) insulin. B) glucagon. C) enzymes. D) somatostatin.
Under the Articles of Confederation, the years between 1781 and 1787 are often referred to as the ³critical period ´ because the
A: colonies were forced to pay high reparations to England B: states were fighting the French and Indian War C: southern states threatened to secede from the Union over the issue of slavery D: central government lacked the power to deal with major problems