Recent questions tagged 143

Concanavalin A is

asked Jul 8, 2019 by pady_1

1 answer

If $\begin{align}y = e^{{-x}^2} \int_0^x e^{t^2} dt \end{align}$, then $\frac{dy}{dx} + 2xy$ is equal to :

asked Dec 19, 2018 by pady_1

0 answers

If $\overrightarrow{a} = -\hat{i} + 2 \hat{j} + 3 \hat{k},\;\overrightarrow{b} = \hat{i}-2\hat{j}+\hat{k}, \; \overrightarrow{c} = 4 \hat{i} - 3 \hat{j} - 2 \hat{k}$ and $\overrightarrow{a} + \lambda \overrightarrow{b}$ is perpendicular to $\overrightarrow{c}$, then $\lambda$ is equal to :

asked Dec 19, 2018 by pady_1

0 answers

If $\theta$ is the angle between the vectors $2 \hat{i} + 2 \hat{j} + 4 \hat{k}$ and $3 \hat{i} + \hat{j} + 2 \hat{k}$, then $\sin \theta$ is equal to :

asked Dec 19, 2018 by pady_1

0 answers

If $f(x) = \frac{x^2}{x+a}$, then $f''(a)$ is equal to :

asked Dec 11, 2018 by pady_1

0 answers

Conductivity (Seimen's S) is directly proportional to area of the vessel and the concentration of the soluion in it and is inversely proportional to the length of the vessel, then constant of proportionality is expressed in :

asked Dec 11, 2018 by pady_1

0 answers

The reason for double helical structure of DNA is operation of :

asked Dec 11, 2018 by pady_1

1 answer

If the lines $3x - 4y - 7=0$ and $2x- 3y-5=0$ are two diameters of a circle of area $49\; \pi\; square$ units, the equation of the circle is :

asked Nov 13, 2018 by pady_1

0 answers

Which of the following factors may be regarded as the main cause of lanthanide contraction ?

asked Nov 5, 2018 by pady_1

0 answers

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

asked Nov 5, 2018 by pady_1

2 answers

According to Hugo de Vries, the mechanism of evolution is

asked Aug 21, 2018 by pady_1

1 answer

In a common emitter transistor amplifier the audio signal voltage across the collector is $3 \;V$. The resistance of collector is $3\; k \Omega$. If current gain is $100$ and the base resistance is $2 \;k \Omega$, the voltage and power gain of the amplifier is :

asked Aug 21, 2018 by pady_1

1 answer

At what height from the surface of earth the gravitation potential and the value of $g$ are $– 5.4 \times 10^7 \;J \;kg^{–2}$ and $6.0\; ms^{–2}$ respectively ? Take the radius of earth as $6400\; km$ :

asked Aug 21, 2018 by pady_1

1 answer

If vectors $\overrightarrow{A} = \cos \omega \hat{i} + \sin \omega \hat{j} $ and $\overrightarrow{B} = \cos \frac{\omega t}{2} \hat{i} + \sin \frac{\omega t}{2} \hat{j} $ are functions of time, then the value of $t$ at which they are orthogonal to each other is :

asked Aug 21, 2018 by pady_1

1 answer

The motile bacteria are able to move by:

asked Aug 20, 2018 by pady_1

1 answer

Which one of the following organelle in the figure correctly matches with its function ? <br> <img src = ""/>

asked Aug 20, 2018 by pady_1

1 answer

A single strand of nucleic acid tagged with a radioactive molecule is called

asked Aug 20, 2018 by pady_1

1 answer

Which one of the following helps in absorption of phosphorus from soil by plants ?

asked Aug 16, 2018 by pady_1

1 answer

Which one of the following is an example of ex- situ conservation ?

asked Jul 26, 2018 by pady_1

1 answer

Cyclic photophosphorylation results in the formation of :

asked Jul 26, 2018 by pady_1

1 answer

Haploids are more suitable for mutation studies than the diploids. This is because:

asked Jul 26, 2018 by pady_1

1 answer

Male gametes in angiosperms are formed by the division of:

asked Jul 26, 2018 by pady_1

1 answer

Pentamerous, actinomorphic flowers, bicarpellary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of-

asked Jul 25, 2018 by pady_1

0 answers

Biodiversity Act of India was passed by the Parliament in the year -

asked Jul 24, 2018 by pady_1

0 answers

India's wheat yield revolution in the 1960s was possible primarily due to :-

asked Jul 24, 2018 by pady_1

1 answer

What does "lac" refer to in what we call the lac operon : -

asked Jul 24, 2018 by pady_1

1 answer

Which bacteria is utilized in Gober gas plant : -

asked Jul 23, 2018 by pady_1

1 answer

Salmonella is related with : -

asked Jul 20, 2018 by pady_1

1 answer

Which pair is correct :

asked Jul 20, 2018 by pady_1

1 answer

Non–symbiotic nitrogen fixing bacteria :

asked Jun 15, 2018 by pady_1

1 answer

2.35 m of cloth is needed to make a shirt. How many metre of cloth is needed to make 10 such shirts?

asked Dec 31, 2015 by pady_1

0 answers

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