Exam 13: Gene Expression

Translocation is the process whereby the __________ moves in order to place the tRNA bound to the growing polypeptide chain in the __________ site, thereby freeing the __________ site for a new aminoacyl-tRNA.

Which of the following serves as an "adapter" in protein synthesis and bridges the gap between mRNA and proteins?

The enzyme peptidyl transferase catalyzes peptide bond formation during the elongation stage of translation. __________________

What evolutionary role is served by the redundancy of the genetic code?

Frameshift mutations result from:

Which of the following is made from DNA?

The 3' end of eukaryotic pre-mRNAs are changed by:

Why is only one strand of DNA transcribed into mRNA?

In essentially all organisms, the AUG codon codes for:

Use a flow diagram to illustrate the flow of genetic information from DNA to protein.Include appropriate structures, chemical and cellular, as well as processes in your diagram.

The enzyme peptidyl transferase, which catalyzes the transfer of the polypeptide chain attached to the tRNA in the __________ site to the aminoacyl-tRNA in the __________ site, is thought to be a(n) __________ molecule and not a protein.

A mutation that replaces one amino acid in a protein with another is called a __________ mutation.

How does the first nucleotide at the 5' end of a new mRNA chain differ from the other nucleotides in the chain?

Figure 13-1 Use the figure to answer the corresponding question(s). -RNA differs from DNA in all of the following except:

A transposon is a DNA sequence that "jumps" into the middle of a gene. __________________

The poly-A tail is thought to faciliate the export of mRNA from the nucleus. __________________