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#Id: 7595

#Unit 5. Developmental Biology

Chemotactic compounds hormone Progesterone,  made by the cumulus cells, might trigger the release of Protein kinase A from the sperm cell membrane, & allowing it to activate the sperm-specific cation CatSper channels would facilitate the transfer of calcium ions into the sperm, where they would cause exocytosis of the acrosome

TLS Online TPP Program

#Id: 4731

#Unit 13. Methods in Biology

The ratio T= I/I 0 is called transmission.

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#Id: 10027

#Unit 4. Cell Communication and Cell Signaling

NF-κB stimulates expression of several anti-apoptotic proteins, including FLIP, Bcl-XL, A1/Bfl-1, c-IAP, XIAP, TRAF1, and TRAF2.

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#Id: 6367

#Unit 2. Cellular Organization

This 21-bp sequence is twofold symmetric and is recognized by two subunits of Lac repressor, one binding to each half-site

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#Id: 9176

#Unit 11. Evolution and Behavior

Adaptation is a characteristic that enhances the survival or reproduction of organisms .

Adaptations have evolved by natural selection, which is the centerpiece of On the Origin of Species