3. Energy & Cell Processes

Glycosylation is the post-translational addition of ________ to the protein.

Which of the following is a reversible form of post-translational modification which can activate or deactivate a protein depending on the protein which is being modified?

Each of the following statements about protein synthesis is false. Correct each to make a true statement.

Proteins destined for secretion from the cell enter the nucleus after translation, to be folded and modified.

Number the following steps of protein synthesis in the order in which they occur, starting with 1 and ending with 9.

a. _____The stop codon is reached, and the polypeptide is released. 

b. _____The small ribosomal subunit finds the start codon, and the large ribosomal subunit joins. 

c. _____The end of the gene is reached, and the pre-mRNA is released and then edited. 

d. _____The transcription factor binds the promoter. 

e. _____The protein is folded and modified to become functional. 

f. _____ RNA polymerase builds the mRNA transcript. 

g. _____mRNA and initiator tRNA bind the small ribosomal subunit. 

h. _____ New tRNAs are brought into the A site successively, and the peptide chain of the tRNA in the P site is joined to the amino acid of the tRNA in the A site.

i. ______mRNA exits the nucleus via a nuclear pore.