List of practice Questions

Name the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$ are shared is

Chlorophyll in chloroplast is located in

Bacillus thuringiensis (Bt) strains have been used for designing novel:

The catalytic efficiency of two different enzymes can be compared by the:

The converse of the contrapositive of $p \to \sim q$ is

The solutions of the equation $\begin{vmatrix} {x}&{2} &{-1}\\ {2}&{5}& {x} \\ {-1}&{z}&{x}\\ \end{vmatrix} =0$ are

If $A=\begin{bmatrix} {3}&{5}\\ {2}&{0}\\ \end{bmatrix} $ and $B$ = $\begin{bmatrix} {1}&{17}\\ {0}&{-10}\\ \end{bmatrix} $then $|AB|$ is equal to

According to widely accepted 'fluid mosaic model' cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?

The contrapositive of "If two triangles are identical, then these are similar" is

The inverse of the matrix $\begin{bmatrix} {5}&{-2}\\ {3}&{1}\\ \end{bmatrix}$ is is

A solution of urea (mol mass $56\, g\, mol^{-1})$ boils at $100.18 ^\circ\,C$ at the atmospheric pressure. If $K_f$ and $K_b$ for water are $1.86$ and $0.512\, K\, kg$ $mol^{-1}$ the above solution will freeze at

A ball is thrown vertically upward. It has a speed of \(10\ m/s\) when it has reached one half of its maximum height. How high does the ball rise?
(Take \(g = 10\, m/s^2\))

In Ornithine cycle, which of the following wastes are removed from the blood ?

Which of the following statements regarding enzyme inhibition is correct

Damage to thymus in a child may lead to :

Which of the following is relatively most accurate method for dating of fossils ?

Barophilic prokaryotes

Production of a human protein in bacteria by genetic engineering is possible because :

Protein synthesis in an animal cell occurs :

Two pendulums begin to swing simultaneously. If the ratio of the frequency of oscillations of the two is $ 7:8, $ then the ratio of lengths of the two pendulums will be

The reaction in which phenol differs from alcohol is:

A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide.If $\Delta H$ is the enthalpy change and $\Delta E$ is the change in internal energy, then,

Select the right option in the following

A heating coil takes 6 min to boil certain amount of milk. Another heating coil takes 3 min to boil same amount of milk. Supply voltage is same. When the coils are connected in parallel, time taken to boil same amount of milk is

The insulation property of air breakdown is $3 \times 10^6 V/m$. Maximum charge in coulomb that can be given to a sphere of radius 10 cm is approximately