Protein Synthesis Exam Questions and
Answers
The diagram shows one step in the process of protein synthesis.
mc015-1.jpg
What is the purpose of the peptide bond that is shown in the diagram? - ✅✅It
connects amino acids
During transcription, what happens to the RNA polymerase if a repressor protein
attaches to the operator? - ✅✅It cannot attach to the promoter
Only the proteins that the bacteria Escherichia coli (E. coli) needs are synthesized
at any given time. For example, when lactose is available in the environment, E.
coli will express the lac genes that allow it to break down lactose to obtain
energy. When lactose is not present, these genes are not expressed.
mc012-1.jpg
Which prevents the lac genes in the DNA of E. coli from being expressed most of
the time? - ✅✅the lac repressor
Answers
The diagram shows one step in the process of protein synthesis.
mc015-1.jpg
What is the purpose of the peptide bond that is shown in the diagram? - ✅✅It
connects amino acids
During transcription, what happens to the RNA polymerase if a repressor protein
attaches to the operator? - ✅✅It cannot attach to the promoter
Only the proteins that the bacteria Escherichia coli (E. coli) needs are synthesized
at any given time. For example, when lactose is available in the environment, E.
coli will express the lac genes that allow it to break down lactose to obtain
energy. When lactose is not present, these genes are not expressed.
mc012-1.jpg
Which prevents the lac genes in the DNA of E. coli from being expressed most of
the time? - ✅✅the lac repressor
