The innermost serous membrane layer in direct contact with the heart is the:
A. parietal pericardium
B. visceral pleura
C. synovial layer
D. visceral pericardium
E. peritoneum
Answer: D. visceral pericardium
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In normal cells, p53 protein acts as
A) a signal transducer. B) a tumor suppressor. C) a proto-oncogene activator. D) a GTPase inhibitor. E) None of these
Mild effects of cyanide exposure:
A) include slow, shallow respirations and generally require positive-pressure ventilatory assistance. B) can only be reversed with high doses of amyl nitrate and high-flow oxygen via nonrebreathing mask. C) include hemoptysis and hematemesis, and mandate immediate treatment with hyperbaric oxygen. D) generally resolve by simply removing the victim from the environment and administering oxygen.
Which pair is correctly matched, regarding electron transport carriers in eukaryotes?
A) Complex I - succinate dehydrogenase complex B) Complex II - cytochrome c oxidase complex C) Complex III - cytochrome bc? complex D) Complex IV - NADH dehydrogenase complex E) None of the answer choices is correct.
Which of the following are the “building blocks” of proteins?
A) amino acids B) monosaccharides C) nucleotides D) peptides