Wow! That medicine really tasted bitter! In which lobe of the cerebrum did you consciously think about that?
A) parietal B) occipital C) temporal D) frontal
Answer: A
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For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25 degrees Celsius. What can you conclude about this reaction?
A. It is exergonic B. It is endergonic C. it is a redox reaction D. It is being catalyzed by an enzyme
GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG. What effect does this mutation have on the population's mean fitness?
A. As the frequency of the GGC codon increases, the population's mean fitness level will remain the same.
B. As the frequency of the GGC codon increases, the population's mean fitness level will initially increase, but once GGC and GGG occur with equal frequency, the mean fitness will decrease.
C. As the frequency of the GGC codon increases, the population's mean fitness level will decrease.
D. As the frequency of the GGC codon increases, the population's mean fitness level will increase.
Which structure always contains three nucleotides?
A) tRNA B) an anticodon C) mRNA D) ribosome
A(n) ____ includes the entire genome.
A. cDNA library B. transcribed library C. genomic library D. RNA library E. plasmid library