Recent questions tagged medium

The density of crystalline sodium chloride is $2.165g cm^{-3}$ . What is the edge length of the unit cell.

asked Apr 9, 2014 by sharmaaparna1

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Phytochrome is

asked Apr 9, 2014 by sreemathi.v

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Which one shows red $\leftrightharpoons$ far-red interconversions

asked Apr 9, 2014 by sreemathi.v

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Which one produces more ethylene

asked Apr 9, 2014 by sreemathi.v

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The two circles $x^2+y^2=ax$ and $x^2+y^2=c^2\; (c > 0) $ touch each other if

asked Apr 9, 2014 by meena.p

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A chemical believed to be involved in flowering is

asked Apr 9, 2014 by sreemathi.v

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Intercept on the line $y=x$ by the circle $x^2+y^2-2x=0$ is $AB$ equation of the circle on AB as a diameter is :

asked Apr 9, 2014 by meena.p

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Ethylene is

asked Apr 9, 2014 by sreemathi.v

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Artificial ripening of fruits is accomplished by treatment with

asked Apr 9, 2014 by sreemathi.v

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Photomorphogenetic pigment in plants is

asked Apr 9, 2014 by sreemathi.v

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Which of the following physiological effect is caused in plants by gibberellic acid

asked Apr 9, 2014 by sreemathi.v

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The substance which accelerates the growth in stem is

asked Apr 9, 2014 by sreemathi.v

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A response to length of day in plants is called

asked Apr 9, 2014 by sreemathi.v

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The classical experiments in growth were performed by

asked Apr 9, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Cytokinins help in retention of chlorophyll and delayed senescence in leaves.}\\\text{Reason:The hormone cytokinin stimulates root initiation.}\end{array}$

asked Apr 9, 2014 by sreemathi.v

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If the lines $2x+3y+1=0,\qquad 3x-y-4=0$ lie along diameter of a circle of circumference $10\pi$ then the equation of the circle is :

asked Apr 8, 2014 by meena.p

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Some of the plants flower only in summer whereas some flower in winters.}\\\text{Reason:These flowers require specific photoperiods for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:If the long dark period is interrupted by flash of light in xanthium it will not flower.}\\\text{Reason:Xanthium is a long day plant in which case a continuous long light period is essential for flowering.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

If the two circles $(x-1)^2+(y-3)^2=r^2$ and $x^2+y^2-8x+2y+8=0$ intersect in two distinct point then

asked Apr 8, 2014 by meena.p

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Given the Assertion and Reason below, Choose one of the following responses

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The isolated aleurone layer induces amylase activity when Gibberellic acid is added.}\\\text{Reason:Enzyme amylase converts insoluble starch to soluble sugars.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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The centre of the circle passes through $(0,0)$ and $(1,0)$ and touching the circle $x^2+y^2=9$ is

asked Apr 8, 2014 by meena.p

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In germinating seeds fats are stored as reserve food material and are rich in glyoxysomes.}\\\text{Reason:Germinating seeds are responsible for the conversion of fats into sugar to provide energy to germinating seeds.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In the actively growing herbaceous plants the axillary buds are generally dormant.}\\\text{Reason:It is because of apical dominane due to the presence of auxins.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:In plants during water stress and drought conditions ABA plays an important role.}\\\text{Reason:When the ABA is applied exogeneously it promotes stomatal opening.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses :

asked Apr 8, 2014 by sreemathi.v

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The number of common tangent to the circle $x^2+y^2=4$ and $x^2+y^2-6x-8y=24$

asked Apr 8, 2014 by meena.p

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A copper disc at $\;0^{0}C\;$ has a diameter of 50 cm and a hole is cut in the center with a diameter 5 cm . The diameter of the hole at $\;100^{0}C\;$ will be $\;(\alpha = 0.00016/^{0}C)\;$

asked Apr 8, 2014 by yamini.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:When the cytokinin is applied to the plants it induces senescence.}\\\text{Reason:Cytokinins promote the breakdown of roteins,chlorophyll and nucleic acids.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given that the furthest the earth gets from the sun is approximately 94.56 million miles, and the eccentricity of earth's orbit is approximately 0.017, what is the closest approach of the earth to the sun.

asked Apr 8, 2014 by balaji.thirumalai

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Ethylene is a gaseous phytohormone.}\\\text{Reason:It is responsible for the ripening of many fruits}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

A composite bar of length $\;(l_{1} + l_{2})\;$ is made from two bars of length $\;l_{1}\;$ and $\;l_{2}\;$ . Their coefficients of linear expansion $\;\alpha_{1}\;$ and $\;\alpha_{2}\;$ respectively . The effective linear coefficient of composite bar

asked Apr 8, 2014 by yamini.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Dry seeds do not germinate.}\\\text{Reason:The most important external factor for seed germination is water.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The pigment cytochrome controls photomorphogenetic responses.}\\\text{Reason:Cytochrome pigment occurs in two photoreversible forms.}\end{array}$

asked Apr 8, 2014 by sreemathi.v

1 answer

The center of circle inscribed in square formed by the lines $x^2-8x+12=0$ and $y^2-14\;y+45=0$ is

asked Apr 8, 2014 by meena.p

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Match the words for column I with Column II:In column I are given phytohormones and in column II their functions.

asked Apr 8, 2014 by sreemathi.v

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If the tangent at the point P on the circle $x^2+y^2+6x=2$ meets a straight line $5x-2y+6=0$ at a point Q on the y-axis , then the length of $PQ$ is

asked Apr 8, 2014 by meena.p

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Match the words of the two columns :

asked Apr 8, 2014 by sreemathi.v

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A satellite dish has a diameter of 8 feet. The depth of the dish is 1 foot at the center of the dish. Where should the receiver be placed?

asked Apr 8, 2014 by balaji.thirumalai

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There are 10 points in a plane out of these 6 are collinear. If N is the number of triangle formed by joining these points. Then

asked Apr 8, 2014 by meena.p

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Chloroplast contains maximum quantity of

asked Apr 8, 2014 by sreemathi.v

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Silver crystallises in a face centered cubic unit cell . The density of Ag is $10.5 g cm^{-3}$. Calculate the edge length of the unit cell .

asked Apr 8, 2014 by sharmaaparna1

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Pigment system is concerned with

asked Apr 8, 2014 by sreemathi.v

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The shortest distance between the line $y-x=1$ and the curve $x=y^2$ is

asked Apr 8, 2014 by meena.p

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An equilateral triangle is inscribed in the parabola $y^2 = 4 ax$, where one vertex isat the vertex of the parabola. Find the length of the side of the triangle.

asked Apr 8, 2014 by balaji.thirumalai

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Chlorophyll is present

asked Apr 8, 2014 by sreemathi.v

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Photophosphorylation means synthesis of

asked Apr 8, 2014 by sreemathi.v

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The specific function of light energy in the process of photosynthesis is to

asked Apr 8, 2014 by sreemathi.v

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