According to Miller and other researchers, the most difficult condition to have been met in an "RNA world" was to
A. have converted clay particles into organic molecules.
B. produce specialized molecules, such as enzymes, lipids, and carbohydrates that supported life functions.
C. produce chemical reactions that would produce large molecules.
D. synthesize molecules that would coalesce into the correct shape and structure of cells.
E. have established molecules that reproduce themselves.
E. have established molecules that reproduce themselves.
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Steady state kinetics describes a reaction with the assumption that:
A. there is only one ES intermediate. B. the formation and dissociation of the [ES] complex occurs at equal rates. C. the rate of the reaction is constant. D. Vmax occurs when the enzyme is saturated. E. There are no assumptions required.
Without data from the base composition studies of Chargaff, what might Watson and Crickâs modeling studies have erroneously concluded?
A. Bases could pair with themselves (e.g. A with A, C with C). B. Any purine could pair with any purine. C. Any pyrimidine could pair with any pyrimidine. D. Any purine could pair with any purine and any pyrimidine could pair with any pyrimidine. E. Any purine could pair with any pyrimidine.
Where is the primary meristem located?
A. Dermal tissue. B. Vascular tissue. C. Woody stem. D. Root and stem tips. E. Stem tip only.
Four of the following maintain genetic equilibrium and allele frequencies. Which one is the exception?
a. lack of gene flow b. large population interbreeding freely c. differential survival and reproduction d. random mating e. absence of mutations