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The lac operon is found only in prokaryotes and consists of structural genes and a promoter and operator. Which of the following statements explains why we study the lac operon?
If there is an insertion mutation in the operator of the lac operon, the expression of the lac structural gene will be __________
How many structural genes are present in a lac operon?
The lactose (lac) operon of the bacterium E. coli has which of the following structural genes?
If the lac operon of the genome of bacteria is always active it has a defect in which region of the operon?
Lac, a scarlet resinous secretion of tiny insects referred to as lac insects, which produces a gum like secretion used in the production of various commodities such as gums, dyeing fabrics, bangle making, wood polishing etc. Which of the following state is the largest producer of LAC in India?
A and B jointly owe Rs. one lac to C. A alone pays the whole amount to C. B not knowing the fact of payment by A pays Rs. one lac over again to C. Is C bound to repay Rs. one lac to B.
The minimum Long Run Average Cost (LAC) can be determined on a
I. LAC curve for a normal production function
II. LAC curve for a linear production function
III. Planning curve
IV. Envelope curve
Consider the following statements and choose the correct answer:
1. The structural genes direct the synthesis of cellular proteins through messenger RNA (mRNA)
2. The promoter gene determines whether or not the structural genes are to be repressed by the repressor
3. The regulator gene directs the synthesis of a protein which may be an active repressor or an inactive repressor
What does the structural gene (y) of a lac operon code for?