If you were going to develop a new antibiotic against bacteria, you would probably need to become an expert on which of these carbohydrates?
A) glycogen
B) chitin
C) peptidoglycan
D) cellulose
E) starch
Answer: C
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You have a patient who complains of pain in his joints. You ask whether he drinks much water during the day and find out he does not. You therefore suspect his nitrogenous waste is deposited in his joints after it is converted from its usual form of
A. ammonia into urea. B. urea into ammonia. C. uric acid into urea. D. urea into uric acid. E. uric acid into ammonia.
RNAi could be used to treat macular degeneration by
a. preventing the development of excess blood vessels. b. increasing the turnover rate of blood vessels in the retina. c. preventing the replication of the virus that causes macular degeneration. d. blocking expression of the viral genes that allow infection of retinal cells to occur. e. stimulating the capillaries to tighten their walls, preventing the plasma leakage that clouds vision.
If Peter is allergic to peanuts and Paul is not, what is the precise molecular difference in Peter's bloodstream responsible for this?
A. Peter's blood has mast cells and basophils carrying IgEs that match an antigen on peanuts. B. Peter's blood has a continually excessive level of histamines and prostaglandins. C. Paul's blood has mast cells and basophils with IgEs that confer immunotolerance to peanuts, but Peter's does not. D. Peter inherited a peanut-specific IgG gene from his mother or father, while Paul did not.
Soil particles are classified on the basis of
A) age. B) color. C) water content. D) size.