Biology
General
Easy
Question
An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reactinons 
A mutant failed to survive on this medium but grew when nutrient B was added to it. Which gene of this mutant was defective
- Only X
- Only Y
- X and Y both
- Neither X or Y
The correct answer is: Only X
Related Questions to study
biology
DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
biologyGeneral
biology
The basic procendure involved in the sythesis of recombinant DNA molecule is depicted. The mistake in the procedure is
The basic procendure involved in the sythesis of recombinant DNA molecule is depicted. The mistake in the procedure is
biologyGeneral
biology
Which of the following in not produced by E.Coil in the lactose
Which of the following in not produced by E.Coil in the lactose
biologyGeneral
physics-
An object is placed in front of a convex mirror of focal length 
Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
An object is placed in front of a convex mirror of focal length Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
physics-General
biology
The Ti plasmid, is often used for making transgenic plants. This plasmid is found in
The Ti plasmid, is often used for making transgenic plants. This plasmid is found in
biologyGeneral
physics-
The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?
The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?
physics-General
biology
Which is true for repressible operon
Which is true for repressible operon
biologyGeneral
physics-
Two wires of the same material (Young’s modulus Y) and same length 
but radii R and 2R respectively are joined end to end and a weight 
is suspended from the combination as shown in the figure. The elastic potential energy in the system is
Two wires of the same material (Young’s modulus Y) and same length but radii R and 2R respectively are joined end to end and a weight is suspended from the combination as shown in the figure. The elastic potential energy in the system is
physics-General
physics-
Two wires, one made of copper and other of steel are joined end to end (as shown in figure). The area of cross-section of copper wire is twice that of steel wire.
They are placed under compressive force of magnitudes F. The ratio for their lengths such that change in lengths of both wires are same is (
Two wires, one made of copper and other of steel are joined end to end (as shown in figure). The area of cross-section of copper wire is twice that of steel wire.
They are placed under compressive force of magnitudes F. The ratio for their lengths such that change in lengths of both wires are same is (
physics-General
biology
Which is true for typtophan operon
Which is true for typtophan operon
biologyGeneral
maths-
If f: R+
R+, f(x) = x2+ 1/x2 and g: R+R+, g(x) = ex then (gof) (x) equals-
If f: R+ R+, f(x) = x2+ 1/x2 and g: R+R+, g(x) = ex then (gof) (x) equals-
maths-General
maths-
If f: R R, f(x) = x2–5x + 4 and g: R R, g(x) = log x, then the value of (gof) (2) is -
If f: R R, f(x) = x2–5x + 4 and g: R R, g(x) = log x, then the value of (gof) (2) is -
maths-General
physics-
The ratio of diameters of two wires of same materials is 
: 1. The length of each wire is 4 m. On applying the same load, the increase in length of thin wire will be 
The ratio of diameters of two wires of same materials is : 1. The length of each wire is 4 m. On applying the same load, the increase in length of thin wire will be
physics-General
physics-
A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is
A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is
physics-General
biology
The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents ?
The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents ?
biologyGeneral
