When you eat a large meal, your stomach can expand slightly to accommodate the food. This
elasticity is due to what type of tissue?
a. muscle
b. epithelial
c. nervous
d. connective
A
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In human development, the blastocyst, which is a hollow sphere of developing cells, implants in the uterine wall approximately 5 to 6 days after fertilization
A. true B. false
When the replication machinery encounters a single-strand break, the replication fork collapses resulting in a double-strand break. Which of the following would be the fourth step in repairing this damage?
A. The 3' single-strand overhang invades the intact portion of the chromosome, pairs with its complementary strand, and displaces the other. B. Once the strand invasion is complete, branched migration occurs. C. The broken ends are processed, with the 5' ending strand selectively degraded to create 3' overhangs. D. Branch migration creates Holliday intermediates that are resolved by the enzyme resolvase. E. Resolution of the Holliday intermediate is followed by ligation and replication is restarted.
What is the function of the gallbladder?
a. production of gastric fluids b. production of digestive enzymes c. storage of bile d. production of bile
Most biological molecules are joined by
A) hydrogen bonds. B) peptide bonds. C) covalent bonds. D) ionic bonds. E) disulfide bonds.