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In lac operon if mutation occurs in the...

In lac operon if mutation occurs in the middle gene of the 'structural gene' then

A

`beta`-galactosidase will not be synthesised

B

Permease will not be synthesised

C

Transacetylase will not be synthesised

D

Lactose digestion will be rapid

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The correct Answer is:
B
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In lac- opeon if mutation occurs in the middle gene of the 'structural gene' then

Gene mutations occurs in

Gene mutation is :

In lac operon i gene codes for :

The sequence of structural genes in lac operon is

The lac operon consists of a regulation gene and three structural gene. The lactose acts as inducer. In the presence of an Inducer such as lactose, the repressor is in inactivated during the interaction. This allows RNA polymerase access to the promoter and transcription proceeds. The repressor is synthesized which in turn binds with the operator region of the operon and prevents RNA polymerase from transcribing the operon. Identify the correct sequence of the structural genes in the lac operon.

The lac operon consists of a regulation gene and three structural gene. The lactose acts as inducer. In the presence of an Inducer such as lactose, the repressor is in inactivated during the interaction. This allows RNA polymerase access to the promoter and transcription proceeds. The repressor is synthesized which in turn binds with the operator region of the operon and prevents RNA polymerase from transcribing the operon. The lac operon of E. coli contains genes involved in lactose metabolism. It's expressed only when lactose is _____ (1)and glucose is _____(2).

The lac operon consists of a regulation gene and three structural gene. The lactose acts as inducer. In the presence of an Inducer such as lactose, the repressor is in inactivated during the interaction. This allows RNA polymerase access to the promoter and transcription proceeds. The repressor is synthesized which in turn binds with the operator region of the operon and prevents RNA polymerase from transcribing the operon. Which of the following statement is true in reference to the lac operon process in E.coli? (i) Galactosidase is the only enzyme produced in large quantities when lac operon is turned on (ii) The messenger RNA in lac operon is a polycistronic mRNA

ARIHANT NEET-GENE, ITS EXPRESSION AND REGULATION-Chapter Exercise (C) Medical entrance s gallery
  1. The region of DNA sequence that provides binding site for RNA polymera...

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  2. Who gave semiconservative mode of DNA replication for the first time i...

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  3. In lac operon if mutation occurs in the middle gene of the 'structura...

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  4. Which option is corect for the amino acid and the total number of thei...

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  5. Which option shows correctly labelled region in the given diagram of D...

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  6. If the codon GGU is reversed, the resulting codon will code for this a...

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  7. Identify the correct pair of combinations. I. .^(14)C- Distinction b...

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  8. Assume that the occurrence of nitrogen bases in adjacent positions in ...

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  9. The result of the following reaction/experiment carried out by Avery e...

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  10. Which of the following events would occur in 'Lac' operon' of E. coli ...

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  11. Statement A : The primary transcript produced in eukaryotic is transla...

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  12. The diagram shows an important concept in the genetic implicatio of D...

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  13. Which enzyme/s will be produced in a cell in which there is a nonsense...

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  14. What would happen if in a gene encoding a polypeptide of 50 amino acid...

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  15. The number of codons that code different amino acids is

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  16. Some amino acids are coded by more than one codon

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  17. What is correct gene expression pathway ?

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  18. What is not true for genetic code ?

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  19. Okazaki is known for his contribution to the understanding of

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  20. During replication of DNA, Okazaki fragments are formed in the directi...

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