The diagram shows the rate of diffusion into a cell using carrier proteins. 
McGraw-Hill EducationCarrier proteins are saturated at which point?
A. 1
B. 2
C. 3
D. 4
Answer: D
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Contrast
(a) is the amount that an object’s image is enlarged. (b) is the extent to which detail in an image is preserved during the magnifying process. (c) is the degree to which image details stand out against their background. (d) focuses light rays emanating from an object to produce an image.
Once the stored ATP is consumed, what
substance will muscles turn to for energy?
a. glucose b. lactate c. sugar d. creatine phosphate e. myoglobin
Basic vs applied science
What will be an ideal response?
Disadvantages of continuous cell cultures include
A. they only grow for a limited number of generations. B. the expense of preparation. C. they may be significantly different genetically from the original source animal. D. viruses do not reliably infect them. E. they are both expensive and have a limited number of divisions.