The hair cells are arranged in four rows: 

Three rows of outer hair cells (20,000)

One row of inner hair cells (3500)

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#Id: 584

#Unit 2. Cellular Organization

Stimulation of b-galactosidase synthesis by cAMP with wild-type and mutant CAP.

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#Id: 7916

#Unit 2. Cellular Organization

Energy inputs are needed to Import proteins into mitochondria

Chaperone proteins (Hsp70& Hsp90)

An H+ electrochemical gradient, or proton-motive force

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#Id: 6106

#Unit 3. Fundamental Processes

Thymine dimers cause mutations in two ways. (1) Dimers perturb the structure of DNA double helices and interfere with accurate DNA replication. (2) Errors occur during the cellular processes that repair defects in DNA, such as UV-induced thymine dimers To identify chemicals that are converted into mutagens in the liver, the Ames test treats potential indirect mutagens with a mixture of liver extract

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#Id: 1568

#Unit 4. Cell Communication and Cell Signaling

Homologs

β-catenin in vertebrates =Armadillo in Drosophila.

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#Id: 596

#Unit 2. Cellular Organization

When DNA is extensively damaged (such as by UV light. RecA protein binds to this damaged, single-stranded DNA, activating the protein's coprotease activity. While bound to DNA, the RecA protein facilitates cleavage and inactivation of the Lex and Lambda repressor.