Match the following genes of the Lac operon with their respective products- a- i gene i- -galactosidase b- z gene ii- Permease c- a gene iii- Repressor d- y gene iv- Transacetylase

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Standard XII

Biology

Lac Operon

Match the fol...

Question

Match the following genes of the Lac operon with their respective products.

a. i gene i. $β -$ galactosidase

b. z gene ii. Permease

c. a gene iii. Repressor

d. y gene iv. Transacetylase

a-iii, b-iv, c-i, d-ii

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a-i, b-iii, c-ii, d-iv

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a-iii, b-i, c-ii, d-iv

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a-iii, b-i, c-iv, d-ii

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Solution

The correct option is D a-iii, b-i, c-iv, d-ii
The lac operon consists of :

the regulatory i gene which codes for the repressor of the lac operon

structural gene z codes for beta-galactosidase (β-gal), which plays a role in the hydrolysis of lactose into galactose and glucose

structural gene y codes for permease. Permease increases permeability of the cell to β-galactosides

structural gene a codes for transacetylase

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Similar questions

Q. Match the following genes of the Lac operon with their respective products.

a.	i gene	i.	$β -$ galactosidase
b.	z gene	ii.	Permease
c.	a gene	iii.	Repressor
d.	y gene	iv.	Transacetylase

Q. Considering lac operon, match the following:

\begin{matrix} C o l u m n I & C o l u m n I I p . R e g u l a t o r g e n e & i . B i n d i n g s i t e f o r r e p r e s s o r p r o t e i n q . O p e r t o r g e n e & i . C o d e (s) f o r t h e p r o t e i n o f t h e e n z y m e s r . P r o m o t e r g e n e & i i i . C o d e (s) f o r r e p r e s s o r p r o t e i n s . S t r u c t u r a l g e n e s & i v . B i n d i n g S i t e f o r R N A p o l y m e r a s e \end{matrix}

Q. Select the statements that describe characteristics of genes :
(i) genes are specific sequence of bases in a DNA molecule
(ii) a gene does not code for proteins
(iii) in individuals of a given species, a specific gene is located on a particular chromosome
(iv) each chromosome has only one gene

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Match the following:

$\begin{matrix} A . D N A p r o f i l i n g & i) T r e a t e m e n t o f g e n e t i c d i s e a s e s B . G e n e m a p p i n g & i i) T e s t i n g t h e a r r a n g e m e n t o f n u c l e o t i d e s C . G e n e t h e r a p y & i i i) T h e s u m o f g e n e t i c m a t e r i a l p r e s e n t i n a n o r g a n i s m D . G e n o m e & i v) L o c a t i n g t h e p o s i t i o n o f a g e n e i n t h e D N A \end{matrix}$

Question 21
Select the statements that describe characteristics of genes.

(i) Genes are the specific sequence of bases in a DNA molecule.
(ii) A gene does not code for proteins.
(iii) In individuals of a given species, a specific gene is located on a particular chromosome.
(iv) Each chromosome has only one gene.

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

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Match the following genes of the Lac operon with their respective products. a. i gene i. β−galactosidase b. z gene ii. Permease c. a gene iii. Repressor d. y gene iv. Transacetylase

Match the following genes of the Lac operon with their respective products.

a. i gene i. $β -$ galactosidase

b. z gene ii. Permease

c. a gene iii. Repressor

d. y gene iv. Transacetylase