DNA may be damaged from the by-products of normal cellular aerobic respiration. Name three of these electrophilic oxidants that are generally classified as reactive oxidants
What will be an ideal response?
Superoxides (O2?), hydroxyl radicals (?OH), and hydrogen peroxide (H2O2)
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Mosses are gametophyte plants. What can you predict about them from this statement?
A. Mosses are diploid. B. Mosses grow from seeds (zygotes). C. Mosses are haploid. D. Answers a and c are both correct.
Countershading is a common form of camouflage in ____ fishes
a. coral reef b. eel grass bed c. pelagic d. deep sea
Which of the following is TRUE about water?
a. The oxygen end is slightly electropositive. b. Hydrogen bonds hold water molecules together. c. Water covers about one-half of the surface of the earth. d. Hydrophobic interactions attract water molecules. e. Solvent properties are greatest with nonpolar molecules
LDL cholesterol is taken into the cell by receptor-mediated endocytosis
__________________ Indicate whether the statement is true or false.