Jacques Monod and François Jacob deduced the mechanism responsible for the regulation of bacterial gene expression. They are, therefore, responsible for launching the era of
A) the scientific method.
B) molecular genetics.
C) biochemistry.
D) light microscopy.
E) radioisotopes.
B) molecular genetics.
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Why is nitrogen fixation by prokaryotes essential to life on Earth?
a. It removes nitrogen from the soil. b. It converts atmospheric nitrogen to a non-toxic form. c. It provides nitrogen sources for plants and animals. d. It provides an energy source for photosynthesis. e. It allows for the breakdown of complex macromolecules.
When contaminated with E. coli strains toxic
to humans, fresh meat should be cooked to at least ____ in order to prevent any food intoxication.
a. 71?C (160?F) b. 75?C (167?F) c. 65?C (149?F) d. 85?C (185?F) e. 91?C (196?F)
During conscious, quiet rest, the brain is emitting:a
alpha rhythm patterns. b. beta rhythm patterns. c. delta waves. d. gamma waves. e. theta waves.
Most fungi are _____________, and get their food via _____________.
A) photosynthetic, solar energy. B) autotrophic, chemical energy. C) saprobes, extracellular digestion. D) heterotrophic, ingestion.