List of practice Questions

Prothallus of Petridophytes is

Protein encoded by gene cry $I \,AB$ controls the infestation of which of the following insects

In which year, IUPAC draft recommends that anionic ligands will end with-ido so that chloro would become chlorido ?

In the figure, a ladder of mass $m$ is shown leaning against a wall. It is in static equilibrium making an angle $\theta$ with the horizontal floor. The coefficient of friction between the wall and the ladder is $\mu_{1}$ and that between the floor and the ladder is $\mu_{2}$. The normal reaction of the wall on the ladder is $N _{1}$ and that of the floor is $N _{2}$. If the ladder is about to slip, then

In respiration, more than one $R. $ value results from the use of

In order to lessen the suffering of phenylketonurics their diet should have

In habitual alcohol drinkers liver gets damaged because of

In $DNA$ fingerprinting, the process of $DNA$ hybridisation with the help of specific $DNA$ probe is described as

For $x \in(0, \pi)$, the equation $\sin x+2 \sin 2 x-\sin 3 x=3$ has

In a monocot leaf stomata are present

In a dihybrid cross between two heterozygotes $AaBb \times AaBb$, if we get $3 : 1$ ratio among the off springs, the reason for this may be

Let $ f(x) $ be differentiable on the interval $ (0, \infty) $ such that $ f(1) = 1 $ and $ lim_{t \rightarrow x} \frac {t^2f(x)-x^2f(t)}{t-x} =1 $ for each $ x>0 $ . Then, $ f(x) $ is

Let $ V_r $ denote the sum of the first $ r $ terms of an arithmetic progression $ (AP) $ whose first term is $ r $ and the common difference is $ (2r - 1) $ . The sum $ V_1 + V_2 + ..... + V_n $ is

Let $ f $ be the function $ [-\pi, \pi] $ given by $ f(0) = 9 \,and\,f(x) \,=\, f(x) = sin (\frac {9x}{2})/sin(\frac {x}{2}) $ for $ x \neq 0 $ . The value of $ \frac{2}{\pi} \int^{\pi}_{-\pi} $ $ f(x) dx $ is

If $ (1+x+x^2)^n = a_o +a_1x +a_2x^2 +.....+a_{2n} x^{2n}, $ then $ a_o+a_3+a_6+.....= $

$ \frac {C_1}{C_o} + 2 \frac {C_2}{C_1} +3\frac {C_3}{C_2} + .... +n \frac {C_n}{C_{n-1}} $ =

Which of the following is a correct solution of $ x\,cosx\,\left(\frac{dy}{dx}\right) + y(x sin x +cos x) = 1 ? $

Heterogeneous nuclear $RNA (hnRNA)$ is converted to $wRNA$ by

Herbarium sheets are arranged according to the system of classification and should have information about

Figure shows an object $ AB $ placed in front of two thin coaxial lenses $ 1 $ and $ 2 $ with focal lengths $ 24\, cm $ and $ 9.0 \,cm $ , respectively. The object is $ 6.0\, cm $ from the lens I and the lens separation is $ L = 10\, cm $ . Where does the system of two lenses produce an image of the object $ AB $ ?

Classification which is based on evolutionary relationship of various organisms is

Cell cycle includes the sequence

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

Aspergillus niger is used for commercial and industrial production of

Assuming $2s-2p$ mixing is not operative, the paramagnetic species among the following is