Which of the following are polar molecules?
A) water
B) phospholipids
C) hydrocarbons
D) all of the above
E) none of the above
Ans:
A) water
B) phospholipids
You might also like to view...
Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
A) The two strands of the double helix would separate. B) The phosphodiester linkages of the polynucleotide backbone would be broken. C) The purines would be separated from the deoxyribose sugars. D) The pyrimidines would be separated from the deoxyribose sugars. E) All bases would be separated from the deoxyribose sugars.
Which of the following are atmospheric greenhouse gases?
A. methane B. carbon dioxide C. nitrous oxide D. chlorofluorocarbons E. all of the choices
The inhalation of cigarette smoke and similar pollutants has a gradual effect on cilia lining the respiratory tract, first causing the beating to slow and eventually stop. How does this change in cilia most directly impact the resistance mechanisms of the host?
A. Acquired immunity due to antibody response would be lost B. Innate host immunity due to mechanical barrier protection would be lost C. Both acquired and nonspecific immunity would be lost D. Neither acquired nor nonspecific immunity would be lost
Organ systems typically have just one major function
a. True, all organ systems are interdependent. b. True, each organ system can function independently. c. False, many organ systems have multiple functions. d. False, each organ system can function independently.