Advertisements
Advertisements
प्रश्न
In lac operon, lactose acts as:
विकल्प
Inducer
Co-inducer
Repressor
Co-repressor
उत्तर
Inducer
APPEARS IN
संबंधित प्रश्न
Give one significant contribution to the following scientists:
G. Gamow
Nucleic acids along with (i) and (ii) form the macromolecular fraction of the cell.
Which of the following gene is responsible for the synthesis of repressor in operon?
Identify the INCORRECT statement/s.
- Regulation of lac operon by repressor is referred to as negative regulation.
- The repressor protein produced by regulator gene binds to the operator region.
- The sequence constituting the operator region is present upstream of promoter region
- Each operon bas a specific 'Operator'.
Which of the following is TRUE with reference to Operon?
Polycistronic messenger RNA (mRNA) usually occurs in ______.
During expression of an operon, RNA polymerase binds to ______.
The sequence of structural genes in lac operon is ______.
Which of the following is required as an inducer(s) for the expression of lac operon?
Study the schematic representation of the genes involved in the lac operon given below and answer the questions that follow:
| p | i | p | o | z | y | a |
(a) The active site of enzyme permease present in the cell membrane of a bacterium has been blocked by an inhibitor, how will it affect the lac operon?
(b) The protein produced by the i gene has become abnormal due to unknown reasons. Explain its impact on lactose metabolism stating the reason.
(c) If the nutrient medium for the bacteria contains only galactose; will operon be expressed? Justify your answer.
