Which of the following is not an example of suction feeding?
A. trapping prey with blades of baleen
B. rapid expansion of a fish's mouth to take in
water and food
C. insects obtaining a blood meal
D. suckling of young mammals
E. All of the answer options are examples of
suction feeding.
A
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Drugs that act by mimicking the normal substrate of an enzyme, thereby blocking its active site, are called ________.
A. blockers B. inhibitors C. competitive inhibitors D. noncompetitive inhibitors
Human growth hormone (HGH) is a peptide hormone that stimulates growth, cell division and regeneration. HGH is made in the anterior pituitary gland. A researcher wants to introduce the gene encoding human growth hormone into E. coli so she can produce large quantities of the peptide hormone for medical treatments. What strategy should the researcher take?
A. Obtain the HGH gene from a human anterior pituitary gland cDNA library. B. Obtain an HGH gene from another prokaryote. C. Obtain the HGH gene from a human genomic library produced from DNA of the anterior pituitary gland. D. Obtain the HGH gene from a human genomic library produced from DNA from any human tissue. E. Obtain an HGH gene from either a genomic or cDNA library.
_____ are long-chain fatty acids attached to longchain
alcohols. a. Triglycerides b. Phospholipids c. Sterols d. Waxes e. Most neutral fats
Connor decides to celebrate his 21st birthday by drinking a few beers at a local sports bar. After a while, Connor notices that he is making many more trips to the men's room than the week before when he drank similar amounts of carbonated water. Why is that?
A. Alcohol inhibits reabsorption of sugars, amino acids and other small metabolites, which decreases reabsorption of water. B. Alcohol stimulates secretion of ions into the nephron and water follows by osmosis. C. Alcohol inhibits the secretion of ADH by the posterior pituitary gland, thereby decreasing water reabsorption. D. Alcohol stimulates filtration of the blood plasma by the glomeruli. E. Alcohol stimulates the insertion of aquaporins into the plasma membranes of cells that line the collecting ducts, thereby decreasing water reabsorption.