Which current method allows for classification of
both cultivable and non-cultivable prokaryotes?
a. isolation and observation
b. protein analysis
c. lipid analysis
d. DNA sequencing
e. none of these
Answer: d
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Women with PKU who eat a normal diet during pregnancy will have children with ____
a. only a 25% chance of developing PKU b. intellectual disability only if the child's phenotype is homozygous recessive c. intellectual disability only if the child's phenotype is heterozygous d. intellectual disability regardless of the child's genotype e. no greater chance of having PKU than if she ate a special PKU diet
Evolution _____
a. is natural selection b. is heritable change in a line of descent c. can occur by natural selection d. is heritable change in a line of descent and can occur by natural selection
If there were only 2 RNA nucleotides and each
codon was 4 letters long, how many amino acids could be coded for?
a. 2 b. 4 c. 8 d. 16 e. 32
Bacteria able to perform the NH4+ + NO2- ? N2 + 2H2O reaction have been discovered in laboratory bioreactors and wastewater treatment systems. Researchers predicted that these bacteria should exist in oceans
They measured the concentration of NH4+, NO2-, NO3-, and O2 in the Black Sea as a function of water depth (M. Kuypers et al. 2003 Anaerobic ammonium oxidation by anammox bacteria in the Black Sea. Nature 422:608-11 ) to determine where in the sea the bacteria might live. Analyzing data presented in the figure above, at what depth would you expect to find the bacteria? (Note: In the figure, different scales are used to show concentrations of NH4+, NO2-, NO3-, and O2.) A) in the top 50 meters B) at a depth of 75 meters C) at a depth of 92 meters D) below 100 meters