The attraction between water molecules and molecules of solid surfaces is known as:
a) adhesion
b) polarity
c) association
d) hydrolysis
Ans: a) adhesion
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The correct sequence going from smallest to largest is
A. molecule - atom - organelle - tissue - cell. B. tissue - cell - organelle - molecule - atom. C. atom - molecule - organelle - cell - tissue. D. cell - molecule - tissue - organelle - atom. E. cell - tissue - organelle - molecule - atom.
How many different types of chemoreceptors can be found in the taste buds?
A. hundreds B. thousands C. 40-50 D. five
Why would environmentalists nurture baby California condors by the use of puppets?
a. If they were directly touched by humans, other condors might detect a human odor. b. They need to learn certain behaviors before they are free in the environment. c. There are not many adult condors available to nurture them. d. all of these
Each of the following is a characteristic of calmodulin except
A) It binds two calcium ions at each end of the protein. B) When activated by calcium ion binding, it wraps around proteins that have calmodulin binding sites. C) It can activate specific kinases and phosphatases. D) It has a very high affinity for calcium ions, and binds calcium ions irreversibly. E) All are characteristics of calmodulin.