Which of the following is the reason that trypsin is synthesized as trypsinogen?
A) It is simpler to synthesize trypsinogen.
B) Trypsinogen is a more active enzyme than trypsin.
C) Trypsin would attack the body's natural proteins.
D) Trypsin is a larger molecule than trypsinogen.
C
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Glider A of mass of 1 kg and speed 1 m/s on a friction-free air track collides with a 5-kg glider B at rest. For an inelastic collision the combined-glider speed will be
A. 1/5 m/s. B. 1/4 m/s. C. 1/6 m/s. D. 1 m/s.
?Match the term with the correct description.
A. ?increases population B. ?reduces population size C. (?birth + immigration) = (death + emigration) D. ?annual number of live births per 1,000 people E. ?replacement-level fertility rate
Air warmed near equatorial regions rises and then normally sinks at
A) polar regions. B) tropical regions. C) the midlatitudes. D) low latitudes.
Heat-expanded air ________.
A. is less dense than cool air B. has the same density as cool air because matter is neither created nor destroyed in fire C. is more dense than cool air because molecules are pushing harder on each other D. contains less energy than cooler air because there are fewer molecules per unit volume