Superroxide dismutase____.
a. causes hydrogen peroxide to become toxic
b. detoxifies superoxide radicals
c. neutralizes singlet oxygen
d. is missing in aerobes
Ans: b. detoxifies superoxide radicals
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Looking out your window, you may notice that the bark of a nearby oak tree has a mosaic appearance, consisting of deep fissures and relatively flat areas. What accounts for this mosaic appearance? Select all correct choices
A. the formation of new cork cambia as old cork cambia grow away from the phloem B. the formation of new secondary phloem in distinct, discontinuous patches C. the formation of new cork cambia in distinct, discontinuous patches D. the formation of new vascular cambia as old cork cambia grow away from the phloem
Light energy from the sun is captured by photosynthesis as ____
a. heat energy in chemical bonds b. energy in chemical bonds c. chemical energy lost to the environment d. kinetic energy in chemical bonds e. conserved energy
Identification of ribosomal proteins involves two-dimensional gel electrophoresis, which separates the proteins on the basis of __________
A) mass B) folded shape C) charge D) mass and charge E) mass, charge, and folded shape
Blood vessels are made of:
a. mesenchymal cells b. endothelial cells