You are studying a disease caused by insufficient levels of a specific peptide hormone, and characterize mutations in several genes that can lead to the disease. Your startup company can only afford to pursue one gene product as a possible therapy. Which would you choose?
A. Gene A-a transcription factor.
B. Gene B-an enzyme that activates the hormone by cleaving its inactive precursor.
C. Gene C-the hormone itself.
D. Gene D-a kinase that acts downstream of the hormone.
Answer: C
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The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3In such a pond that contains algae and fish, what is happening to the oxygen?
A. Oxygen is only consumed by the fish B. Oxygen is only consumed by both the algae and the fish C. Oxygen is only produced by the algae D. Oxygen is produced by the algae, and consumed by the algae and the fish
How are sound vibrations amplified in a vertebrate ear?
A. by movements of the basilar membrane induced by fluid vibrations B. by movement of the bones of the middle ear C. by differences in the surface area of the eardrum versus the oval window D. by movements of the basilar membrane induced by fluid vibrations AND by movement of the bones of the middle ear
An acid dissociates in water to release
A) hydrogen ion(s). B) cation(s). C) hydroxyl group(s). D) anion(s). E) both anions and hydrogen ions.
External infections can be treated by (intramuscular/surface/topical) administration, in which a drug is applied directly to the site of infection.
Fill in the blank(s) with the appropriate word(s).