Kinetochores assemble on regions of chromosomal DNA marked by a centromere-specific H3 histone variant called CENP-A.

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#Id: 1137

#Unit 2. Cellular Organization

Phosphatase in cell cycle-

Cdc25A phosphatase Activates vertebrate S phase CDKs

Cdc25C phosphatase Activates vertebrate mitotic CDKs

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#Id: 9416

#Unit 11. Evolution and Behavior

A trait can evolve by sexual selection if it increases a male’s overall fitness, even if it decreases survival.

Exaggerated secondary sexual traits are favored by sexual selection because they increase male mating success.

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#Id: 6720

#Unit 8. Inheritance Biology

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#Id: 1246

#Unit 7. System Physiology – Animal

Somatostatin (somatotropin release–inhibiting hormone) –hypothalamus Inhibit growth hormone secretion.

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#Id: 2299

#Unit 3. Fundamental Processes

By 1969 SDS-PAGE of RNA polymerase from E. coli had shown several subunits

1.2 very large subunits are b (150 kD) and b’ (160 kD)

2. Sigma (s) at 70 kD

3. Alpha (a) at 40 kD – 2 copies present in holoenzyme

4. Omega (w) at 10 kD