Ifa lysosome breaks, what protects the rest of the cell from lysosomal enzymes?
What will be an ideal response?
The lysosomal enzymes are all acid hydrolases, which have optimal activity at the low pH (about 5.0) found in the interior of lysosomes. If a lysosome were to break, the acid hydrolases would find themselves at pH 7.2, the pH of the cytosol, and would therefore do little damage to cellular constituents.
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Which type of growth curve is pictured for the accompanying photo of a desert shrub?
a. type II b. logistic c. type I d. exponential e. type III
Which researcher in 1761 noted unusual tumors of the nose in snuff users and suggested tobacco as the causative agent?
A. John Hill B. Sir Percivall Pott C. Katsusaburo Yamagiwa D. Ernst Winder E. Richard Doll
What are the benefits of using animals in research?
What will be an ideal response?
Manta rays, sting rays, and eagle rays are similar to lampreys in that they have cartilaginous skeletons. How are they different from lampreys?
A. They have gills. B. They have closed circulatory systems. C. They have bony fin lobes. D. They have jaws.