Initiation of transcription requires:a
a promoter sequence.
b. DNA polymerase.
c. an RNA primer.
d. a DNA primer.
e. Okazaki fragments
A
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The movement of xylem sap is best described from the ____ to the ____
a. shoot system; root system b. sinks; sources c. root system; shoot system d. sources; sinks e. shoot system; sinks
Silica walls are characteristic of
A. diatoms. B. slime molds. C. euglenoids. D. red algae. E. brown algae.
ELISA tests use a fluorescent dye as a label to trace antigen-antibody reactions.
Answer the following statement true (T) or false (F)
A newly discovered microorganism has a circular chromosome that is complexed with histones, but not enclosed within a membrane. The plasma membrane lipids include glycerol dietethers and diglycerol tetraethers. There are no mitochondria or chloroplasts, but the cells do contain 70s ribosomes. This microbe most likely is ________.
A. a protozoan B. a bacterium C. an archaeon D. a fungus