Mismatches between the strands of DNA are one of the major targets for excision repair systems. Mismatch repair (MMR) is accomplished by scrutinizing DNA for apposed bases that do not pair properly

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#Unit 7. System Physiology – Animal

Each spherical follicle is surrounded by a single layer of polarized epithelial cells and filled with pink-staining proteinaceous material called colloid.

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#Unit 11. Evolution and Behavior

Hitchhiking: Change in the frequency of an allele due to linkage with a selected allele at another locus.

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#Id: 5410

#Unit 7. System Physiology – Animal

Microglia 

arise from macrophages outside of the nervous system are scavenger cells that resemble tissue macrophages and remove debris resulting from injury, infection, and disease.

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#Unit 7. System Physiology – Animal

Addison disease (primary adrenocortical insufficiency) caused by autoimmune destruction of all zones of the adrenal cortex.

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#Id: 2298

#Unit 3. Fundamental Processes

The transition from the closed to the open complex involves structural changes in the enzyme and the opening of the DNA double helix to reveal the template and nontemplate strands. This “melting” occurs between positions –11 and +2, with respect to the transcription start site.