Rate-limiting step in synthesis of catecholamines:  Tyrosine is converted to dihydroxy-phenylalanine (DOPA) by tyrosine hydroxylase

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#Id: 5492

#Unit 10. Ecological Principles

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#Id: 7028

#Unit 11. Evolution and Behavior

 Before Darwin - Christians interpreted “special creation”

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#Id: 6942

#Unit 8. Inheritance Biology

An inversion moves a wild-type allele (red eyes) at the white locus in Drosophila to a chromosomal region that contains highly condensed, the wild-type allele is not expressed in some cells, resulting in an eye consisting of red and white spots.

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#Id: 10429

#Unit 4. Cell Communication and Cell Signaling

Acute myeloid leukemias

characterized by DNA hypomethylation, due to inactivating mutations in an enzyme that catalyzes the methylation of CpG dinucleotides.

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#Id: 10148

#Unit 6. System Physiology – Plant

According to the current hypothesis, the gradient in phototropin phosphorylation induces the movement of auxin to the shaded side of the coleoptile. Once the auxin reaches the shaded side of the tip, it is transported basipetally to the elongation zone, where it stimulates cell elongation. The acceleration of growth on the shaded side and the slowing of growth on the illuminated side (differential growth) give rise to the curvature toward light.