Chain elongation consists of three steps: (1) positioning the correct aminoacyl-tRNA to the A site, (2) forming the peptide bond and (3) __.

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#Question id: 1127

#XL - Q Biochemistry

Which of the following steps does not occur after acetylcholine binds to the muscarinic acetylcholine receptor in heart muscle cells?

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#Question id: 3054

#XL - S Microbiology

A pure culture in exponential growth phase has a bacterial concentration of 6.4 x 10^8 cells/ml. If the bacterium has a generation time of 1 h, how long ago was the cell concentration 8.0 x 10^7 cells/ml?

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#Question id: 376

#XL - S Microbiology

Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is

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#Question id: 2145

#XL - S Microbiology

An electrogenic Na+ transporter:

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#Question id: 15457

#XL - S Microbiology

Activation-Induced Cytidine Deaminase (AID), which was subsequently shown to be necessary for