Both plant cells and animal cells will swell if placed in a hypotonic solution. However, only the animal cell will burst. Why?
What will be an ideal response?
Water will enter both cells due to osmosis. In the animal cell, water will continue to enter as long as the extracellular solution is hypotonic, causing the pliable animal cell membrane to eventually break and the cell to burst. The stiff cell wall found in plant cells but not animal cells will not expand indefinitely. At some point, as the cytoplasm of the plant cell expands, the cell wall will exert a back pressure on the cell. Further water uptake will be prevented and the plant cell will not burst.
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The lack of susceptibility to diseases of other species in humans may be due to the
A. secretion of exotoxins. B. presence of endotoxins. C. action of IL-2. D. lack of receptors that are recognized by adherence factors.
Plant cell walls are composed of which of the following?
A. Cellulose B. Sucrose C. Protein D. Wax
Which method of DNA repair uses light to repair thymine dimers that have been causes by UV light exposure
What will be an ideal response?
Transposition (insertion of a transposon into a DNA sequence) results in the formation of base substitution mutations in a cell's DNA
Indicate whether the statement is true or false