What is the molecular diameter of the DNA helix (in angstroms)?
What will be an ideal response?
20
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Cell-to-cell communication by quorum sensing has been shown to be important in the regulation of genes needed for
A. biofilm production. B. plasmid transfer. C. virulence. D. All of the choices are correct.
In a two-dimensional gel electrophoresis experiment, proteins are generally separated vertically by ____
A. net charge B. molecular mass C. abundance D. isoelectric point
The prevalence of the allele for sickle cell anemia in some populations is an example of?
A. Heterogeneous environments B. Balancing selection C. Inverted selection D. Non-Darwinian selection E. Nonrandom mating
Premeiotic germ cells that divide mitotically in females are
A) primary oocytes. B) secondary oocytes. C) ootids. D) oogonia. E) ova.