1) What does the operon model attempt to explain? a) The control mechanism of ge
ID: 280244 • Letter: 1
Question
1) What does the operon model attempt to explain? a) The control mechanism of gene expression in bacteria. b) Bacterial resistance to antibiotics c How genes move between homologous regions of DNA d) Both b and c are correct 2) All of the following consist of a sequence of nucleotide bases except a) repressor. b) structural gene. c) promoter. d) regulatory gene. e) operator. 3) The role of a substrate that controls a repressible operon is to a) bind to the promoter region and decrease the affinity of RNA polymerase for the promoter b) bind to the operator region and block the attachment of RNA polymerase to the promoter. c) increase the production of inactive repressor proteins d) bind to the repressor protein and inactivate it. e) bind to the repressor protein and activate it. For question 4 through 6, match the following terms with the appropriate phrase or description below. Each term can be used once, more than once, or not at all. a) operon b) operator c) promoter d) repressor 4) A protein that is produced by a regulatory gene. 5) A mutation in this section of DNA could influence the binding of RNA polymerase to the DNA. 6) The presence of this protein molecule and the absence of lactose would result in the inability of the cell to transcribe genes.Explanation / Answer
1. a, The control mechanism of gene expression in bacteria
2. a, repressor
A repressor is a protein.
3. e, bind to the repressor and activate it.
The susbstrate acts as co-repressor.
4. d, repressor
5. c, promoter
6. repressor
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.