Promoters that are constitutively expressed and needed in all cells (their genes are sometimes called housekeeping genes) have upstream sequence elements that are recognized by ubiquitous activators.

TLS Online TPP Program

#Id: 7539

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 1491

#Unit 4. Cell Communication and Cell Signaling

p53 protein product is regulated by a protein called MDM2, which works through a negative feedback loop.

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#Id: 9597

#Unit 11. Evolution and Behavior

Homo habilis – First tool maker

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#Id: 4468

#Unit 13. Methods in Biology

The smaller the value of D, the better the resolution. The value of D is given by the equation.

TLS Online TPP Program

#Id: 3820

#Unit 5. Developmental Biology

The top of the mound continues to emit cAMP pulses and is pushed upwards by the movement of cells underneath