Which of the following wavelengths of light would you expect to be reflected or transmitted by chlorophyll a?
A) blue
B) green
C) yellow
D) red
Answer: B
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True or False: an uncatalyzed reaction has a higher G than the same reaction when catalyzed by an enzyme
A. true B. false
The fact that humans have a relatively large number of mutations per genome per generation when compared to other organisms can be explained by:
A. humans are so complex we have multiple proteins doing the same job. B. human cells don't divide as often as those of other organisms. C. most of a human's DNA is noncoding, so most of the mutations are neutral. D. most of these mutations happen after reproduction, so they wouldn't be selected against. E. humans have multiple proteins doing the same job, and our cells don't divide as often as other those of other organisms.
Which of the following is an example of cardiac output?
a. The hummingbird heart beats approximately 800 times per minute. b. During exercise, the heart rate in humans can double. c. The human heart pumps about 1500 gallons of blood per day. d. All of these are examples of cardiac output.
Why must tropomyosin cover the thin filament in just the right position before the muscle can relax?
A) It covers the myosin-binding sites and, if left exposed, will allow the myosin to bind and pull. B) Without tropomyosin in the correct position, calcium cannot be released. C) It is needed in the proper location, or ATP cannot be used. D) It has a particular binding place that facilitates the removal of calcium.