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The sequence of structural gene in lac operon concept is
- a)lac A, lac Z, lac Y
- b)lac Z, lac Y, lac A
- c)lac Y, lac Z, lac A
- d)lac A, lac Y, lac Z
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The sequence of structural gene in lac operon concept isa)lac A, lac Z...
Explanation:
lac Operon:
The lac operon is a cluster of genes involved in the metabolism of lactose in bacteria. It consists of three structural genes - lac Z, lac Y, and lac A.
Sequence of Structural Genes:
The correct sequence of structural genes in the lac operon is as follows:
- lac Z: This gene encodes for beta-galactosidase, an enzyme that breaks down lactose into glucose and galactose.
- lac Y: This gene encodes for permease, a protein that facilitates the entry of lactose into the bacterial cell.
- lac A: This gene encodes for transacetylase, an enzyme that is involved in the metabolism of lactose.
Therefore, the correct sequence of structural genes in the lac operon is lac Z, lac Y, lac A. Each gene plays a specific role in the metabolism of lactose, and their arrangement in this order ensures the efficient utilization of lactose by the bacterial cell.
lac Operon:
The lac operon is a cluster of genes involved in the metabolism of lactose in bacteria. It consists of three structural genes - lac Z, lac Y, and lac A.
Sequence of Structural Genes:
The correct sequence of structural genes in the lac operon is as follows:
- lac Z: This gene encodes for beta-galactosidase, an enzyme that breaks down lactose into glucose and galactose.
- lac Y: This gene encodes for permease, a protein that facilitates the entry of lactose into the bacterial cell.
- lac A: This gene encodes for transacetylase, an enzyme that is involved in the metabolism of lactose.
Therefore, the correct sequence of structural genes in the lac operon is lac Z, lac Y, lac A. Each gene plays a specific role in the metabolism of lactose, and their arrangement in this order ensures the efficient utilization of lactose by the bacterial cell.
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The sequence of structural gene in lac operon concept isa)lac A, lac Z...
Sequence of Structural Genes in Lac Operon
- Lac Z: The lac Z gene encodes for beta-galactosidase, an enzyme responsible for breaking down lactose into glucose and galactose. This gene is located first in the lac operon.
- Lac Y: The lac Y gene encodes for lactose permease, a membrane protein that facilitates the transport of lactose into the bacterial cell. This gene is located second in the lac operon.
- Lac A: The lac A gene encodes for transacetylase, an enzyme that is involved in the detoxification of certain harmful compounds. This gene is located last in the lac operon.
Therefore, the correct sequence of structural genes in the lac operon is lac Z, lac Y, lac A. This arrangement allows for the efficient utilization of lactose by the bacterial cell through the coordinated expression of these three genes.
- Lac Z: The lac Z gene encodes for beta-galactosidase, an enzyme responsible for breaking down lactose into glucose and galactose. This gene is located first in the lac operon.
- Lac Y: The lac Y gene encodes for lactose permease, a membrane protein that facilitates the transport of lactose into the bacterial cell. This gene is located second in the lac operon.
- Lac A: The lac A gene encodes for transacetylase, an enzyme that is involved in the detoxification of certain harmful compounds. This gene is located last in the lac operon.
Therefore, the correct sequence of structural genes in the lac operon is lac Z, lac Y, lac A. This arrangement allows for the efficient utilization of lactose by the bacterial cell through the coordinated expression of these three genes.
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