DNA binds in a large cleft composed of three domains. The “palm” domain has important conserved sequence motifs that provide the catalytic active site. The “fingers” are involved in positioning the template correctly at the active site. The “thumb” binds the DNA as it exits the enzyme, and is important in processivity.

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#Id: 1885

#Unit 4. Cell Communication and Cell Signaling

Development of T cells from hematopoietic stem cells on bone marrow stromal cells expressing the Notch ligand.

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#Id: 10166

#Unit 6. System Physiology – Plant

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#Id: 2728

#Unit 12. Applied Biology

Which one of the following can be used as a selection marker for developing transgenic plants?

green fluorescent protein

β-glucuronidase

β-galactosidase

hygromycin phosphotransferase

 

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#Id: 6537

#Unit 7. System Physiology – Animal

The influx of Ca2+ ions raises, triggering the fusion of insulin- containing secretory vesicles with the plasma membrane and the secretion of insulin

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#Id: 7331

#Unit 11. Evolution and Behavior

Assumptions—If a population is large, randomly mating, and not affected by  mutation, migration, or natural selection.

Prediction 1 —The allelic frequencies of a population do not change

Prediction 2- The genotypic frequencies stabilize after one  generation in the proportions p2, 2pq, and q2.