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Which of the following is least likely to be involved in stabilizing the three-dimensional folding of most proteins?

Option: 1

Hydrogen bonds


Option: 2

Electrostatic interaction


Option: 3

Hydrophobic interaction


Option: 4

Ester bonds


The hepatic portal vein drains blood to liver from

Option: 1

Heart


Option: 2

Stomach


Option: 3

Kidneys


Option: 4

Intestine


Which one of the following is wrong for fungi?

Option: 1

They are eukaryotic.


Option: 2

All fungi possess a purely cellulosic cell wall.


Option: 3

They are heterotrophic.


Option: 4

They are both unicellular and multicellular.


Select the wrong statement 

 

Option: 1

The walls of diatoms are easily destructible 


Option: 2

Diatomaceous earth is formed by the cell walls of diatoms 


Option: 3

Diatoms are cheif producers in the oceans 


Option: 4

Diatoms are microscopic and float passively in water 


Transmission tissue is characteristic feature of:

Option: 1

Dry stigma


Option: 2

Wet stigma


Option: 3

Hollow style


Option: 4

Solid style


The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between:

Option: 1

n = 3 to n = 1 states


Option: 2

n = 2 to n = 1 states


Option: 3

n = 4 to n = 3 states


Option: 4

n = 3 to n = 2 states


A fruit developed from hypanthodium inflorescence is called:

Option: 1

Sorosis


Option: 2

Syconus


Option: 3

Caryopsis


Option: 4

Hesperidium


The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:

Option: 1

spermatogonia - spermatocyte - spermatid - sperms


Option: 2

spermatid - spermatocyte - spermatogonia - sperms


Option: 3

spermatogonia - spermatid - spermatocyte - sperms


Option: 4

spermatocyte - spermatogonia - spermatid - sperms


In which of the following molecules / ions BF_3, \text{NO}_{2}^{-}  , NH_2^-and H_2O, the central atom is sp2 hybridized?

Option: 1

\text{NH}_{2}^{-} and H2O


Option: 2

\text{NO}_{2}^{-} and H2O


Option: 3

BF3  and \text{NO}_{2}^{-}


Option: 4

\text{NO}_{2}^{-} and \text{NH}_{2}^{-}


Propionic acid with \mathrm{Br_{2}/P} yields a dibromo product. Its structure would be:

Option: 1

      Br

      |

H - C - CH2COOH

      |

     Br

 

 

 


Option: 2

CH2Br - CH2 - COBr


Option: 3

            Br

             |

  CH3  - C - COOH

             |

            Br

 

 

 

 

 


Option: 4

CH2Br - CHBr - COOH


Given below are four statements (a-d) regarding human blood circulatory system

(a) Arteries are thick-walled and have narrow lumen as compared to veins

(b) Angina is acute chest pain when the blood circulation to the brain is reduced

(c) Persons with blood group AB can donate blood to any person with any blood group under ABO system

(d) Calcium ions play a very important role in blood clotting

Which two of the above statements are correct?

Option: 1

(a) & (d)


Option: 2

(a) & (b)


Option: 3

(b) & (c)


Option: 4

(c) & (d)


A ray of light is incident on a 60° prism at the minimum deviation position. The angle of refraction at the first face (i.e., incident face) of the prism is

Option: 1

Zero


Option: 2

30°


Option: 3

45°


Option: 4

60°


Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be

Option: 1

Infinite


Option: 2

3 Joules


Option: 3

9 Joules


Option: 4

Zero


The tendency of BF_3, BCl_3\ and\ BBr_3 to behave as Lewis acid decreases in the sequence :

Option: 1

BF_3 > BCl_3 > BBr_3


Option: 2

BCl_3 > BF_3 > BBr_3


Option: 3

BBr_3 > BCl_3 > BF_3


Option: 4

BBr_3 > BF_3 > BCl_3


The principal nitrogenous excretory compound in humans is synthesised

Option: 1

In the liver but eliminated mostly through kidneys


Option: 2

In kidneys but eliminated mostly through liver


Option: 3

In kidneys as well as eliminated by kidneys


Option: 4

In liver and also eliminated by the same through bile


Which one of the following statements about human sperm is correct?

Option: 1

Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation


Option: 2

The sperum lysins in the acrosome dissolve the egg envelope facilitating fertilisation


Option: 3

Acrosome serves as a sensory structure leading the sperm towards the ovum


Option: 4

Acrosome serves no particular function


Which one of the following pairs is wrongly matched while the remaining three are correct?

Option: 1

Bryophyllum - Leaf buds


Option: 2

Agave - Bulbils


Option: 3

Penicillium - Conidia


Option: 4

Water hyacinth - Runner


Select the correct statement with respect to diseases and immunisation

Option: 1

Certain protozoans have been used to mass produce hepatitis B vaccine


Option: 2

Injection of snake antivenom against snake bite is an example of active immunisation


Option: 3

If due to some reason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen


Option: 4

Injection of dead / inactivated pathogens causes passive immunity


Which one of the following pairs is wrongly matched while the remaining three are correct?

Option: 1

Bryophyllum - Leaf buds


Option: 2

Agave - Bulbils


Option: 3

Penicillium - Conidia


Option: 4

Water hyacinth - Runner


About which day in a normal human menstrual cycle does rapid secretion of LH (Popularly called LH-surge) normally occurs

Option: 1

5th day


Option: 2

11th day


Option: 3

14th day


Option: 4

20th day


Which of the following structures is the most preferred and hence of lowest energy for SO3?

Option: 1


Option: 2


Option: 3


Option: 4


The rate of the reaction
2N_2O_5 \rightarrow 4 NO_2 + O_2

Can be written in three ways

\frac{-\text{d}[\text{N}_{2}\text{O}_{5}]}{\text{dt}}=\text{k}[\text{N}_{2}\text{O}_{5}]

\frac{\text{d}[\text{NO}_{2}]}{\text{dt}}=\text{k}^{\prime}[\text{N}_{2}\text{O}_{5}]

\frac{\text{d}[\text{O}_{2}]}{\text{dt}}=\text{k}^{\prime\prime}[\text{N}_{2}\text{O}_{5}]

The relationship between k and k' and between k and k'' are

Option: 1

k' = 2k; k'' = 2k


Option: 2

k' = k; k'' = k


Option: 3

k' = 2k; k'' = k


Option: 4

k'= 2k; k'' = k/2


Match the compounds given in List-I with List-II and select the suitable option using the code given below.

List-I                                                 List-II

a. Benzaldehyde                       (i)  Phenolphthalein 

b. Phthalic anhydride                (ii)  Benzoin condensation   

c. Phenyl benzoate                   (iii) Oil of wintergreen

d. Methyl salicylate                  (iv)  Fries rearrangement

Option: 1

a(ii), b(iii), c(iv), d(i)


Option: 2

a(ii), b(i), c(iv), d(iii)


Option: 3

a(iv), b(i), c(iii), d(ii)


Option: 4

a(iv), b(ii), c(iii), d(i)


Which of the following is correct option for free expansion of an ideal gas under adiabatic condition?

Option: 1

q=0,\:\Delta T\neq 0,w=0


Option: 2

q\neq 0, \Delta T = 0, w = 0


Option: 3

q=0,\Delta T =0,w= 0


Option: 4

q=0,\Delta T < 0,w \neq 0


If n = 6 the correct sequence for filling of electrons will be :

Option: 1

n s \rightarrow n p\rightarrow (n-1) d \rightarrow(n-2) f


Option: 2

n s \rightarrow(n-2) f \rightarrow(n-1) d \rightarrow n p


Option: 3

n s \rightarrow(n-1) d \rightarrow(n-2) f \rightarrow n p


Option: 4

n s \rightarrow(n-2) f \rightarrow n p \rightarrow(n-1) d


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