342950
The repressor of the operon is synthesised (allthe-time - constitutively) from the_____
1 i gene.
2 z gene.
3 y gene.
4 a gene.
Explanation:
The repressor of the operon is synthesised (all-the-time - constitutively) from the i gene.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342951
According to the lac operon concept, which functional unit of the bacterial gene material is responsible for suppressing the activity of the operator gene in the absence of lactose?
1 Promoter gene
2 Repressor protein
3 Regulator gene
4 Structural gene
Explanation:
In the absence of lactose, the regulator i gene codes for active repressor protein and produces it all the time. The repressor protein binds to the lac operator. This binding prevents RNA polymerase from catalyzing the transcription of the three structural genes. The enzymes for using lactose are not produced.
KCET - 2008
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342952
Select the correct option i. z gene codes \(\rightarrow\) beta-galactosidase \((\beta\)-gal \()\) ii. y gene codes \(\rightarrow\) permease iii. a gene \(\rightarrow\) transacetylase iv. i gene \(\rightarrow\) repressor of the lac operon
1 Only i is correct
2 Only ii,iii is correct
3 Only i, ii, iii is correct
4 All are correct
Explanation:
All are correct.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342953
Enzyme needed for transportation of lactose into the cells is
1 Galactosidase
2 Transacetylase
3 Permease
4 Lactase
Explanation:
Lactose is the carbon source needed for the growth of the bacteria. Lactose is transported into the cells of bacterium through the action of permease.
342950
The repressor of the operon is synthesised (allthe-time - constitutively) from the_____
1 i gene.
2 z gene.
3 y gene.
4 a gene.
Explanation:
The repressor of the operon is synthesised (all-the-time - constitutively) from the i gene.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342951
According to the lac operon concept, which functional unit of the bacterial gene material is responsible for suppressing the activity of the operator gene in the absence of lactose?
1 Promoter gene
2 Repressor protein
3 Regulator gene
4 Structural gene
Explanation:
In the absence of lactose, the regulator i gene codes for active repressor protein and produces it all the time. The repressor protein binds to the lac operator. This binding prevents RNA polymerase from catalyzing the transcription of the three structural genes. The enzymes for using lactose are not produced.
KCET - 2008
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342952
Select the correct option i. z gene codes \(\rightarrow\) beta-galactosidase \((\beta\)-gal \()\) ii. y gene codes \(\rightarrow\) permease iii. a gene \(\rightarrow\) transacetylase iv. i gene \(\rightarrow\) repressor of the lac operon
1 Only i is correct
2 Only ii,iii is correct
3 Only i, ii, iii is correct
4 All are correct
Explanation:
All are correct.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342953
Enzyme needed for transportation of lactose into the cells is
1 Galactosidase
2 Transacetylase
3 Permease
4 Lactase
Explanation:
Lactose is the carbon source needed for the growth of the bacteria. Lactose is transported into the cells of bacterium through the action of permease.
342950
The repressor of the operon is synthesised (allthe-time - constitutively) from the_____
1 i gene.
2 z gene.
3 y gene.
4 a gene.
Explanation:
The repressor of the operon is synthesised (all-the-time - constitutively) from the i gene.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342951
According to the lac operon concept, which functional unit of the bacterial gene material is responsible for suppressing the activity of the operator gene in the absence of lactose?
1 Promoter gene
2 Repressor protein
3 Regulator gene
4 Structural gene
Explanation:
In the absence of lactose, the regulator i gene codes for active repressor protein and produces it all the time. The repressor protein binds to the lac operator. This binding prevents RNA polymerase from catalyzing the transcription of the three structural genes. The enzymes for using lactose are not produced.
KCET - 2008
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342952
Select the correct option i. z gene codes \(\rightarrow\) beta-galactosidase \((\beta\)-gal \()\) ii. y gene codes \(\rightarrow\) permease iii. a gene \(\rightarrow\) transacetylase iv. i gene \(\rightarrow\) repressor of the lac operon
1 Only i is correct
2 Only ii,iii is correct
3 Only i, ii, iii is correct
4 All are correct
Explanation:
All are correct.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342953
Enzyme needed for transportation of lactose into the cells is
1 Galactosidase
2 Transacetylase
3 Permease
4 Lactase
Explanation:
Lactose is the carbon source needed for the growth of the bacteria. Lactose is transported into the cells of bacterium through the action of permease.
342950
The repressor of the operon is synthesised (allthe-time - constitutively) from the_____
1 i gene.
2 z gene.
3 y gene.
4 a gene.
Explanation:
The repressor of the operon is synthesised (all-the-time - constitutively) from the i gene.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342951
According to the lac operon concept, which functional unit of the bacterial gene material is responsible for suppressing the activity of the operator gene in the absence of lactose?
1 Promoter gene
2 Repressor protein
3 Regulator gene
4 Structural gene
Explanation:
In the absence of lactose, the regulator i gene codes for active repressor protein and produces it all the time. The repressor protein binds to the lac operator. This binding prevents RNA polymerase from catalyzing the transcription of the three structural genes. The enzymes for using lactose are not produced.
KCET - 2008
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342952
Select the correct option i. z gene codes \(\rightarrow\) beta-galactosidase \((\beta\)-gal \()\) ii. y gene codes \(\rightarrow\) permease iii. a gene \(\rightarrow\) transacetylase iv. i gene \(\rightarrow\) repressor of the lac operon
1 Only i is correct
2 Only ii,iii is correct
3 Only i, ii, iii is correct
4 All are correct
Explanation:
All are correct.
BIOXII06: MOLECULAR BASIS OF INHERITANCE
342953
Enzyme needed for transportation of lactose into the cells is
1 Galactosidase
2 Transacetylase
3 Permease
4 Lactase
Explanation:
Lactose is the carbon source needed for the growth of the bacteria. Lactose is transported into the cells of bacterium through the action of permease.
