The Hubbard Brook Experimental Forest is best known for what occurring after forest clearing?
A) primary succession
B) sere
C) secondary succession
D) final succession
C
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Which of the following is FALSE when comparing RNA and DNA?
A. Both contain nucleotides connected by phosphodiester linkages. B. Both contain phosphate groups. C. Both are composed of nucleotides that contain sugars. D. Both are composed of identical nucleotides. E. Both are composed of nucleotides that contain a phosphate group, a pentose sugar, and a nitrogenous base. F. Both have a 5’ end and a 3’ end. G. Both are composed of purines and pyrimidines.
Cyclic electron transport is different from noncyclic electron transport in that cyclic electron transport produces
NADPH. __________________ Indicate whether the statement is true or false.
What initiates the sodium-potassium pump?
A. Two potassium ions are transported into the cell. B. ATP binds to the protein which becomes phosphorylated (ADP is released). C. Three sodium ions are translocated out of the cell. D. Three sodium ions bind to the cytoplasmic side of the protein. E. Phosphorylated pump has low affinity for sodium allowing sodium to leave and potassium to bind.
In the hypothetical biochemical pathway, P ? Q + R ? S ? T, which step is likely to have evolved first?
A. P ? Q B. R ? S C. Q + R D. S ? T