Assume you inoculated 100 cells, with a generation time of 20 minutes, into 100 ml of nutrient broth. You then inoculated 100 cells of the same species into 200 ml of nutrient broth. After incubation for 4 hours, you can reasonably expect to have
A) more cells in the 100 ml.
B) more cells in the 200 ml.
C) the same number of cells in both.
D) The answer cannot be determined based on the information provided.
C
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Glucose, sucrose, and cellulose are examples of:
A) carbohydrates. B) disaccharides. C) monosaccharides. D) polysaccharides.
You are interested in the mobility of two different unknown integral plasma membrane proteins—protein X and protein Y—in a cell. In one cell, you fluorescently label all the X proteins
In another cell, you label all the Y proteins. When you perform FRAP analysis on both cells, you find that most of the protein X fluorescence has recovered within 3 minutes, but recovery of the protein Y fluorescence is significantly slower. Even after 10 minutes, only 50% of the protein Y fluorescence has recovered. Describe the FRAP experimental protocol, explain what the results tell you about mobility of the X and Y proteins, and propose a possible explanation for why the mobilities of the two proteins differ. What will be an ideal response?
Which of the following defense cells are able to squeeze through the intact walls of capillaries into the tissues to attack and ingest invading microbes?
A) B cells B) Lymphocytes C) Phagocytes D) Mast cells E) Natural killer cells
Which of the following is known as the "Age of the Modern Man?"
a) Mesozoic Era b) Cenozoic Era c) Paleozoic Era d) Cretaceous Era e) none of the above