When the positive terminal is on the right arm, the lead is known as the aVR lead.

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#Id: 6297

#Unit 3. Fundamental Processes

Down mutations to decrease promoter efficiency usually decrease conformance to the consensus sequences, whereas up mutations have the opposite effect.

 Mutations in the -35 sequence can affect initial binding of RNA polymerase.

Mutations in the -10 sequence can affect binding or the melting reaction that converts a closed to an open complex.

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#Id: 1591

#Unit 5. Developmental Biology

Hensen’s node (Primitive Knot)

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#Id: 3163

#Unit 11. Evolution and Behavior

 Orthogenesis- “Straight-line evolution,” held that the variation that arises is directed toward fixed goals.

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#Id: 402

#Unit 2. Cellular Organization

Centromeric H3 (or CenH3) histone, known as Cse4 in yeast. CenH3 histones are incorporated into specialized nucleosomes present at centromeres.

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#Id: 739

#Unit 3. Fundamental Processes

DNA strand synthesis requires the four deoxynucleoside triphosphates—dGTP, dCTP, dATP, and dTTP in equal in vivo concentration