is equal to

#Question id: 4152

#Section 3: Genetics, Cellular and Molecular Biology

The pathway for polypeptides exported from E. coli includes the following steps, which occur in what order for correct export?

1.  A chaperone, SecA, binds to the polypeptide.

2.  A chaperone, SecB, binds to the polypeptide.

3.  ATP is hydrolyzed by Sec A.

4.  SecA pushes 20 amino acids of the polypeptide into the translocation complex.

#Question id: 4153

#Section 3: Genetics, Cellular and Molecular Biology

Ubiquitin-mediated protein degradation is a complex process, and many of the signals remain unknown.  One known signal involves recognition of amino acids in a processed protein that are either stabilizing (Ala, Gly, Met, Ser, etc.) or destabilizing (Arg, Asp, Leu, Lys, Phe, etc.), and are located at:

#Question id: 4155

#Section 3: Genetics, Cellular and Molecular Biology

Of all the possible triplet codons, __ do not code for an amino acid.

#Question id: 4156

#Section 3: Genetics, Cellular and Molecular Biology

The reading frame of DNA is fixed by

#Question id: 4157

#Section 3: Genetics, Cellular and Molecular Biology

At the ribosome, the codon and anticodon associate by __.

#Question id: 4158

#Section 3: Genetics, Cellular and Molecular Biology

What is a reasonable number of nucleotides in a tRNA molecule?