An uncatalyzed keto– enol tautomerization reaction occurs quite slowly as a result of the high free energy of its carbanion-like transition state called as

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#Question id: 19047

#Unit 13. Methods in Biology

Paper Chromatography is a physical method that is used to separate__________

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#Question id: 2844

#Unit 2. Cellular Organization

Microsatellite DNA is composed of very short tandemly repeated sequences of

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#Question id: 23854

#Unit 13. Methods in Biology

Which of the following procedures would produce RFLPs?

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#Question id: 12238

#Unit 10. Ecological Principles

The mussel Mytilus edulis thrives in saline habitats, in both the highly salty seawater of tidal zones and the less salty estuaries. This results in two kinds of populations: one adapted to the higher salt concentrations of the tidal zone, and one adapted to the lower salt concentrations of the estuary. It has been found that the more salt-tolerant populations have high frequencies of an allele that produces an enzyme involved in maintaining osmotic equilibrium. Conversely, estuarine mussels having the same enzyme seem to be disfavoured and have a much higher death rate than mussels without the allele. Adult estuarine populations do have lower frequencies of this allele. Each spring, large numbers of larvae from  the salty habitats pour into the estuaries.

The invasion of the seawater larvae would be expected to facilitate change in the genetic structure of the estuarine population by a process called

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#Question id: 1864

#Unit 4. Cell Communication and Cell Signaling

What is the approximate percentage of cases of severe combined immunodeficiency (SCID) due to defects in the Armetis gene?