The lactose operon is under both positive and negative regulation. A bacterial cell does not want to waste the energy to synthesize enzymes to degrade an energy source if that energy source is not present therefore, the lactose operon is regulated to produce enzymes to break down lactose only if lactose is present. When lactose is absent we would expect ALL BUT ONE of these steps to occur.
A) The lac repressor is deactivated.
B) The repressor binds the operator.
C) The lac repressor protein is synthesized in its active form.
D) RNA polymerase is blocked from binding to the promoter sequence.
Answers: 2
Biology, 21.06.2019 19:50, Chapo3760
Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?
Answers: 3
Biology, 22.06.2019 01:30, sharondot2398
Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.
Answers: 1
Biology, 22.06.2019 06:00, bandiadummy8595
Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell
Answers: 3
Biology, 22.06.2019 09:20, vince022503
Match the following items 1. rr 2. rr 3. identical alleles 4. unlike alleles 5. rr ()homozygous, recessive ()homozygous definition ()heterozygous, dominant cell ()heterozygous definition () homozygous, dominant cell
Answers: 2
The lactose operon is under both positive and negative regulation. A bacterial cell does not want to...
Social Studies, 28.08.2019 03:20
Social Studies, 28.08.2019 03:20
Computers and Technology, 28.08.2019 03:20