Regulation of an enzyme's activity occurs
A) transcriptionally.
B) translationally.
C) posttranslationally.
D) at any point on the enzymatic production pathway.
Answer: C
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The only known eukaryotic-bacterial symbioses are the two that explain the development of the chloroplast and mitochondria
A. true B. false
High BOD values reflect small amounts of degradable organic matter in a sample of wastewater or other material
Indicate whether this statement is TRUE or FALSE.
Anticodons pair with ________
a. mRNA codons b. DNA codons c. RNA anticodons d. amino acids e. ribosomes
The most precise method of obtaining estimates of the absolute ages of geological deposits is
A. measure the ratios of various radioactive isotopes in the deposits. B. measure rates of sedimentary rock formation. C. make salinity measurements in ocean sediment deposits. D. study the sequence of fossil types in the deposits. E. apply the principle of superposition (younger deposits above older deposits).