Gene Expression and Gene Regulation

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

What produces repressor proteins?

What is an example of gene expression?

What do repressor proteins do?

What is gene expression and why its regulation is important?

What is an example of a repressor protein?

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

Name the equivalent of structural gene, whether it is exon or cistron.

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?

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.