Regulation of Gene Expression

In the lac operon shown above, name the molecule ‘X’ synthesized by ‘i’ gene and name the molecule synthesised by the Z gene:

Name the inducer which regulates the switching on and off of the lac operon. 

Identify the correct statement:

The Lac operon contains three structural genes ${}^{\text{'}}\mathrm{z}^{\text{'}},{\mathrm{y}}^{\text{'}}$ and ${}^{\text{'}}\mathrm{a}^{\text{'}}$ The structural genes code for
i) The $\text{'}\mathrm{z}\text{'}$ gene codes for beta-galactosidase enzyme.
ii) $\text{'}\mathrm{a}\text{'}$ gene does not code for transacetylase enzyme.
iii) The $\text{'}\mathrm{y}\text{'}$ gene codes for enzyme permease.
iv) $\text{'}\mathrm{y}\text{'}$' gene does not code for the enzyme permease.
v) $\text{'}\mathrm{a}\text{'}$ gene codes a transacetylase enzyme.
The correct combination is

Which is required as an inducer for the expression of Lac operon?

Define Repressors.

Define Operon. 

What is one gene-one enzyme hypothesis? 

To which of the following, repressor protein is attached?

When lactose is the normal energy source in bacterial cell ___________ gene transcribes a repressor mRNA.

Which is not true for the operon model?

An inactive repressor produced by regulator gene that does not block the operator site in the tryptophan operon is called

Select the incorrect statement for 'cAMP' :-

Read the following statements about Lac operon:

i. Each operon has its specific operator and specific repressor.

ii. The Y-gene codes for permease, which increases the permeability of the cell to beta-galactosides.

iii. Regulation of lac operon can be visualised as regulation of enzyme synthesis by its substrate.

Select the correct option.

In the following diagram of the lac operon, which is an operon for inducible enzymes, identify the components and enzymes:-

In the following diagram of the lac operon, which is an operon for inducible enzymes, identify the components and enzymes.

Wild type of Neurospora crassa which can synthesize all essential metabolites from raw materials is called

According to Operon concept, the regulatory gene regulates biochemical reaction in a cell by

Find the correct match