Anthropogenic events ____
a. refer to the carbon cycle
b. refer to all nutrient cycles
c. originate with human activities
d. refer to absorption of the sun’s energy in the atmosphere
e. are caused by human overpopulation
ANSWER: c
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To best isolate mutant bacteria that are threonine auxotrophs from a larger population, threonine-rich media should be inoculated and any colonies that form are presumptive auxotrophic mutants.
Answer the following statement true (T) or false (F)
What wide-acting pituitary hormone targets cells throughout the body?
a. adrenocorticotropic hormone b. thyroid-stimulating hormone c. gonadotropin d. growth hormone e. prolactin
Oxygen has an atomic number of 8. This means that oxygen has ____
a. 8 electrons in its outer most shell b. 8 neutrons in its nucleus c. 4 protons and 4 neutrons in its nucleus d. 8 protons in its nucleus e. 8 protons and 8 neutrons in its nucleus
By their experimentation using the Neurospora fungus, Beadle and Tatum were able to propose the far-reaching hypothesis that ________
A) prototrophs will grow only if provided with nutritional supplements B) the role of a specific gene is to produce a specific enzyme C) genetic recombination occurred in Neurospora D) more than one codon can specify a given amino acid E) several different enzymes may be involved in the same step in a biochemical pathway