All of the following are functions of integral membrane proteins EXCEPT ____
a. transport of polar molecules
b. reception of chemical signals form other cells
c. cell division
d. recognition of other cells as being "like"
e. cell-cell binding
C
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Which of the following alternate hypotheses could explain Yoel's results that on some islands, green anole lizards live higher in the trees and have larger toe pads?
A. The introduction of a predator that lives on the ground caused the green anole lizard population to evolve. B. An increase in the amount of food available on the ground caused the green anole lizard population to evolve. C. A decrease in the temperature caused the green anole lizard population to evolve.
Alkaptonuria is an example of a(n) ________________
A. dominant disorder D. spongiform encephalopathy B. multifactorial disease E. viral-caused mutation C. inborn error of metabolism
Acetylcholine's effect on heart muscle cells results from the activation of receptors that _______ channels.
a. open Na+ b. close Na+ c. open K+ d. close K+
The nectar that bumblebees feed on is an example of a(n) __________
a. carbohydrate b. protein c. amino acid d. peptide