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 An observer looks at a distant tree of height 10 m with a telescope of magnifying power of 20. To the observer the tree appears:

 

Option: 1

10 times taller .


Option: 2

10 times nearer.


Option: 3

20 times taller.


Option: 4

20 times nearer.


An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be:

 

(m is the mass of the electron, R is the Rydberg constant and h is the Planck's constant)

Option: 1

\frac{24hR}{25m}


Option: 2

\frac{25hR}{24m}


Option: 3

\frac{25m}{24hR}


Option: 4

\frac{24m}{25hR}


For transformation, micro-particles coated with DNA to be bombarded with gene gun aremade up of :

Option: 1

Silver or Platinum


Option: 2

Platinum or Zinc


Option: 3

Silicon or Platinum


Option: 4

Gold or Tungsten


Age of a tree can be estimated by:

Option: 1

diameter of its heartwood


Option: 2

its height and girth


Option: 3

biomass


Option: 4

number of annual rings


The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.

Arrows numbered 4,8 and 12 can all be :

Option: 1

FAD + or FADH2


Option: 2

NADH


Option: 3

ATP


Option: 4

H2O


What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows ?

Option: 1

Light stimulates plant cells on the lighted side to grow faster.


Option: 2

Auxin accumulates on the shaded side, stimulating greater cell elongation there.


Option: 3

Green plants need light to perform photosynthesis.


Option: 4

Green plants seek light because they are phototropic.


In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are :

Option: 1

G17%, A 33%, T 33%


Option: 2

G 8.5%, A 50%, T 24.5%


Option: 3

G 34%, A 24.5%, T 24.5%


Option: 4

G 17%, A 16.5%, T 32.5%


Flowers are unisexual in

Option: 1

Cucumber


Option: 2

China rose


Option: 3

Onion


Option: 4

Pea


The letter T in T-lymphocyte refers to:

Option: 1

Thalamus


Option: 2

Tonsil


Option: 3

Thymus


Option: 4

Thyroid


Vegetative propagation in mint occurs by:

Option: 1

Offset


Option: 2

Rhizome


Option: 3

Sucker


Option: 4

Runner


An example of a seed with endosperm, perisperm, and caruncle is:

Option: 1

coffee


Option: 2

lily


Option: 3

castor


Option: 4

cotton


A 0.0020 m aqueous solution of an ionic compound Co(NH3)5 (NO2)Cl freezes at - 0.00732 °C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (kf = - 1.86°C/m)

Option: 1

3


Option: 2

4


Option: 3

1


Option: 4

2


The absolute enthalpy of neutralization of the reaction:

MgO_{\left ( s \right )}+2HCl_{\left ( aq \right )}\rightarrow MgCl_{2\left ( aq\right )}+ H_{2}O\left ( l \right ) will\, \, be:

Option: 1

-57.33 kJ mol^{-1}


Option: 2

Greater than -57.33 kJ mol^{-1}


Option: 3

Less than -57.33 kJ mol^{-1}


Option: 4

57.33 kJ mol^{-1}


When breast feeding is replaced by less nutritive food low in proteins and calories; the infants below the age of one year are likely to suffer from:

Option: 1

Rickets


Option: 2

Kwashiorkor


Option: 3

Pellagra


Option: 4

Marasmus


Which one of the following is a xerophytic plant in which the stem is modified into the flat green and succulent structure?

Option: 1

Opuntia


Option: 2

Casuarina


Option: 3

Hydrilla


Option: 4

Acacia


Kranz anatomy is one of the characteristics of the leaves of

Option: 1

Potato


Option: 2

Wheat


Option: 3

Sugarcane


Option: 4

Mustard


The thermo e.m.f. E in volts of a certain thermo-couple is found to vary with temperature difference \theta in °C between the two junctions according to the relation

\text{E}=300-\frac{\theta_{2}}{15}.

The neutral temperature for the thermo-couple will be

Option: 1

450°C


Option: 2

400°C


Option: 3

225°C


Option: 4

30°C


When glycerol is treated with excess of HI, it produces

Option: 1

2-iodopropane


Option: 2

Allyl iodide


Option: 3

Propene


Option: 4

Glycerol triiodide


For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46 V at 25°C. The value of standard Gibbs energy, \mathrm{\Delta G^{\circ}} will be (F = 96500 C mol-1)

Option: 1

-98.0 kJ


Option: 2

-89.0 kJ


Option: 3

-89.0 J


Option: 4

-44.5 kJ


A solution of sucrose (molar mass = 342 g mol-1) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be :

(Kf for water = 1.86 K kg mol-1)

Option: 1

-0.570°C


Option: 2

-0.372°C


Option: 3

-0.520°C


Option: 4

+0.372°C


Read the following statement having two blanks (A and B)

"A drug used for  ___(A)___ patients is obtained from a species of the organism ___(B)___."

The one correct option for the two blanks is
 

Blank-A

Blank-B
Option: 1

Swine flu

Monascus

 


Option: 2

AIDS

Pseudomonas

 


Option: 3

Heart

Penicillium

 


Option: 4

Organ-transplant

Trichoderma

                                       


In Kranz anatomy, the bundle sheath cells have

Option: 1

Thin walls, no intercellular spaces and several chloroplasts


Option: 2

Thick walls, many intercellular spaces and few chloroplasts


Option: 3

Thin walls, many intercellular spaces and no chloroplasts


Option: 4

Thick walls, no intercellular spaces and large number of chloroplasts


A parallel plate condenser has a uniform electric field E (V/m) in the space between the plates. If the distance between the plates is d (m) and area of each plate is A (m2), the energy (joules) stored in the condenser is:

Option: 1

\frac{1}{2}\in_{\text{o}}\text{E}^{2}\text{Ad}


Option: 2

\frac{\text{E}^{2}\text{Ad}}{\in_{\text{o}}}


Option: 3

\frac{1}{2}\in_{\text{o}}\text{E}^{2}


Option: 4

\in_{o}\text{\text{EAd}}


Which one is a nucleophilic substitution reaction among the following?

Option: 1


Option: 2


Option: 3


Option: 4


Which one of the following amimals is correctly matched with its particular named taxonomic category?

Option: 1

Housefly - Musca, an order


Option: 2

Tiger - tigris, the species


Option: 3

Cuttlefish - Mollusca, a class


Option: 4

Humans - Primata, the family


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