Situational Stress:

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#Question id: 4606

#Unit 11. Evolution and Behavior

Which of the following evidence most strongly supports the common origin of all life on Earth? All organisms ________.

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#Question id: 1813

#Unit 4. Cell Communication and Cell Signaling

The T-cells in male H-2b SCID mice bearing a transgenic αβ T-cell receptor gene specific for H–Y in association with H-2Db will:

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#Question id: 31069

#Unit 2. Cellular Organization

Human SCF complexes contains a phosphoserine/threonine-binding protein, known as:

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#Question id: 16319

#Unit 7. System Physiology – Animal

What is distress?

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#Question id: 2864

#Unit 2. Cellular Organization

In E. coli, the five contiguoustrp genes encode enzymes that sythesize the amino acid tryptophan. These genes are expressed efficiently only when tryptophan is limiting. The genes are controlled by a repressor, just as the lac genes are, although in this case, it is the absence of its ligand (tryptophan) that relieves repression, match trp genes to their gene product,

Trp genes	Gene products
trpE	anthranilate synthetase
trpD	phosphoribosyl anthranilate transferase
trpC	phosphoribosyl anthranilate isomerase-indole glycerol phosphate synthetase
trpB	tryptophan synthetase beta
trpA	tryptophan synthetase alpha