In an inducible operon, the ____ is the molecular switch that controls gene expression, while the ____ is the DNA region where RNA polymerase binds to begin transcription
a. repressor; inducer
b. inducer; repressor
c. operator; promoter
d. promoter; operator
e. lactose; promoter
a
You might also like to view...
During ____ photosynthesis, H2S, H2, Fe2+ or AsO3 3 - can be oxidized
Fill in the blank with the appropriate word.
Which of the four major chemicals found in cells comprise telomeres?
A) Carbohydrates B) Lipids C) Proteins D) Nucleic acids
Explain the concept of homeostasis using the example of how we regulate our body temperature. What will be an ideal response?
Thalassemia is a recessive blood disease caused by reduced synthesis of one of the globin genes
While SCD is a mutation in the structure of hemoglobin, thalassemias can also be caused by mutations in the regulatory elements, causing too little globin to be produced and resulting in anemia. You've designed a DNA probe that you want to use to screen a family for a rare mutation in the ?-globin gene that causes thalassemia. First you will use the probe for northern blotting. What information will the northern blot tell you? A) whether the mRNA for ?-globin is being translated into functional proteins in a given cell population B) whether the amount of the ?-globin gene being transcribed (mRNA levels) is within normal range C) the size of the mRNA being transcribed D) the presence of a particular mutation by restriction fragment analysis E) both B and C are correct