On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection.
<span>Answer:
A. Fluconazole (Diflucan)
• Correct: Fluconazole (Diflucan) is indicated for opportunistic candidiasis infection related to HIV.
• (B) Trimethoprim/sulfamethoxazole (Bactrim) is indicated for bacterial infections such as urinary tract infection.
• (C) Rifampin (Rifadin) is used for treatment of tuberculosis.
• (D) Acyclovir (Zovirax) is an antiviral agent</span>
Options for part A are as follows:
A) A mutation in the operator sequence
B) A mutation in the lac-Z gene
C) A mutation in the lac-Y gene
D) A super repressor mutation
Answer:
The correct answer:
Part a - A mutation in the operator sequence
Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part C. true.
Explanation:
part a:
If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.
part b:
The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part c:
RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.
Yes but just look it up also can someone answer my question? 10 points
