A type of DNA sequence that expands access to a gene to promote its expression is a(n) ________.
Fill in the blank(s) with the appropriate word(s).
enhancer
Enhancer is a type of DNA sequence that expands access to a gene to promote its gene expression.
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The anatomical structure identified with the letter "R" in the figure above is the ____
a. pericardium b. cardiac muscle c. inferior vena cava d. right atrium e. heart apex
Theophylline, a methylxanthine like caffeine, is used to treat asthma. Explain the mechanism by which a methylxanthine can alleviate asthma symptoms resulting from bronchial constriction
What will be an ideal response?
Where in a host's body do most typical tapeworms live and reproduce?
A. in the bloodstream of the host B. in the liver C. in the intestine of the host D. in the larva
Which cells in the immune system produce memory cells?
A) lymphocytes B) eosinophils C) mast cells D) dendritic cells