What is required for facilitated transport to function properly?
a. ATP
b. glucose
c. glycolipids
d. transport protein
d. transport protein
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If a national park is located at twenty inches above sea level, when approximately will it be
fully submerged?
a. in 100 years b. in 200 years c. in 300 years d. in 400 years
Which of the following is a characteristic of a cell’s plasma membrane?
a. Having hydrophilic surfaces b. Being a static structure c. Having three layers of phospholipids d. Having hydrophilic fatty acid tails
For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to label the nitrogen of the DNA rather than the phosphate. They reasoned that each nucleotide has only one phosphate and two to five nitrogens. Thus, labeling the nitrogens would provide a stronger radioactive signal than labeling the phosphates. Why won't this experiment work?
A. Amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins. B. The phosphate in normal DNA is naturally radioactive. C. Although there are more nitrogens in a nucleotide, labeled phosphates actually have 16 extra neutrons; therefore, they are more radioactive. D. There is no radioactive isotope of nitrogen.
Describe how the structure of the bacterial cytoplasmic membrane relates to its function of selective permeability
What will be an ideal response?