A photosynthetic electron-transport chain harnesses approximately what percentage of the sun's usable energy arriving at the surface of a leaf?
A. 8%
B. 12%
C. 24%
D. 60%
E. 95%
C
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During cytokinesis, a critical step in septation is the assembly of the
A. spindle body. B. replisome. C. cytoskeletal spiral. D. Z ring.
Many archaeal genomes include chromosomes and plasmids.
Answer the following statement true (T) or false (F)
Which of the following is the binding site for
RNA polymerase on the DNA molecule? a. structural gene 1 b. repressor gene c. promoter sequence d. operator sequence e. region between an operator and the first structural gene
A cell that has a cell wall is undergoing cell division, and the following events are observed: the formation of a cell plate and the division of the cell into two daughter cells. What type of cell is being observed and what process(es) is it going
through? A) prokaryote; telophase of mitosis B) animal cell; telophase and cytokinesis of mitosis C) plant cell; telophase and cytokinesis of mitosis D) plant cell; telophase II of meiosis