In DNA fingerprinting, amplified fragments of DNA are separated from one another by which process?
A) filtering
B) chromatography
C) electrophoresis
D) PCR (polymerase chain reaction)
C
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Septa divide the actinomycete mycelia into long cells each containing several nucleoids.
Answer the following statement true (T) or false (F)
In the figure above, representing transcription, the item labeled "D" is
a. the nontemplate strand. b. RNA-DNA hybrid. c. the template strand. d. DNA double helix. e. the RNA copy.
The Cenozoic era, during which the diversity of animals living today arose, has extended from 65 mya to the present. This is approximately ___ of the geologic timescale.
A. 4% B. 15% C. 1.5% D. None of the answer choices is correct. E. 7%
Clays often have charged surfaces. How may this have been important in the formation of organic macromolecules?
A. They are a source of ATP to run chemical reactions. B. They are a source of oxygen to break down organic building blocks. C. They can form templates by binding organic building blocks. D. They form covalent bonds with organic building blocks. E. They are formed from meteorites that carried organic molecules to Earth.