If you were working for a pharmaceutical company as part of a drug discovery team, which of these enzyme inhibitors would you suggest as a productive avenue for drug development?
A) a drug to treat high blood pressure that reversibly inhibits an enzyme catalyzing production of a chemical that causes blood vessels to contract
B) a drug to treat diabetes that irreversibly inhibits an enzyme in the metabolic pathway to synthesize glucose
C) a compound that acts as a competitive inhibitor for a digestive enzyme produced only in the presence of certain foods
D) a compound that inhibits enzymes by significantly changing the pH throughout the body
Answer: A
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Which of the following occur during the formation of an embryo from a zygote in angiosperms?
I) The root and shoot systems emerge from the seed. II) Basal cells form a connection between the parent plant and the developing embryo. III) Meiosis produces a mass of cells that become the young embryo. IV) Cells differentiate to form the basic plant tissue types. V) The early root-shoot axis is formed. A) I, II, and III B) II, IV, and V C) II, III, IV, and V D) I, II, and IV E) III, IV, and V
Immunity that develops as a result of an actual infection is called:
A) artificial active acquired immunity. B) artificial passive acquired immunity. C) natural active acquired immunity. D) natural passive acquired immunity.
Visual accommodation involves the ability to ____
a. change the sensitivity of the rods and cones by means of neurotransmitters b. change the position of the retina c. change the thickness of the lens by contracting or relaxing certain muscles d. protect the eyeball from foreign matter e. prevent eye strain
The process of increasing tone by activating more motor units is called ________
Fill in the blank(s) with correct word