SB015 chapter 6

lacA synthesize enzyme

• ß- galactosidase

• Transacetylase

• Permease

What happen when it process translation reach stop codon during termination stage?

• Aminoacyl tRNA bind to A site

• Aminoacyl tRNA bind to P site

• Release factor bind to A site

• Release factor bind to P site

In the presence lactose, the repressor protein will bind with

• operator region

• promoter region

• lactose

• allolactose

Function of operator in lac operon

• Act as binding site for RNA polymerase

• Act as binding site for lactose

• Act as binding site for repressor protein

What is the product of transcription and where does it go after the process?

• tRNA, nucleus

• tRNA, cytoplasm

• mRNA, nucleus

• mRNA, cytoplasm

What is the inducer in lac operon

• Glucose

• Maltose

• lactose

• Allolactose

All of the followings are the function of promoter except for

• Act as binding site for RNA polymerase

• To determine which strand act as template

• Act as binding site for repressor protein

What are the three steps in elongation stage of translation (in sequence order)?

• Codon recognition, translocation, peptide bond formation

• Codon recognition, peptide bond formation,

  translocation

• Peptide bond formation, translocation, codon recognition

• Peptide bond formation, codon recognition, translocation

Which enzyme function is help relieve the strain coused by overwinding

• DNA helicase

• Topoisomerase

• Primase

• DNA ligase

RNA primer is required in process transcription

• Yes

• No