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Number of isomeric alcohols of molecular formula C6H14O which give positive iodoform test is

Option: 1

Three

 


Option: 2

Four


Option: 3

Five


Option: 4

Two


Cytochromes are found in:

Option: 1

Cristae of mitochondria


Option: 2

Lysosomes


Option: 3

Matrix of mitochondria


Option: 4

Outer wall of mitochondria


Nuclear envelope is a derivative of:

Option: 1

Microtubules


Option: 2

Rough endoplasmic reticulum


Option: 3

Smooth endoplasmic reticulum


Option: 4

Membrane of Golgi complex


The UN conference of Parties on climate change in the year 2012 was held at:

Option: 1

Doha


Option: 2

Lima


Option: 3

Warsaw


Option: 4

Durban


The stability of the +1 oxidation state among Al,Ga, In\ and\ Tl increases in the sequence :

Option: 1

Ga < In < Al < Tl


Option: 2

Al < Ga < In < Tl


Option: 3

Tl < In < Ga < Al


Option: 4

In < Tl < Ga < Al


The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is :

Option: 1

\frac{{\text{VR}^2 }} {{\text{nr}^2 }}


Option: 2

\frac{{\text{VR}^2 }} {{\text{n}^\text{3} \text{r}^2 }}


Option: 3

\frac{{\text{V}^\text{2} \text{R}}} {{\text{nr}}}


Option: 4

\frac{{\text{VR}^\text{2} }} {{\text{n}^\text{2} \text{r}^\text{2} }}


Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements

Statements:

(A) Wings of butterflies and birds look alike and are the results of (i)_______________evolution.

(B) Miller showed that CH4, H2, NH3, and (i)_______________when exposed to electric discharge in a flask resulted in the formation of (ii)_______________.

(C) Vermiform appendix is a (i)_______________ organ and an (ii)_______________ evidence of evolution.

(D) According to Darwin evolution took place due to (i)_______________ and (ii)_______________ of the fittest.

Option: 1

(D) - (i) Small variations, (ii) Survival,
(A) - (i) Convergent


Option: 2

(A) - (i) Convergent,

(B) - (i) Oxygen, (ii) nucleosides


Option: 3

(B) - (i) Water vapour, (ii) Amino acids

(C) - (i) Rudimentary, (ii) Anatomical


Option: 4

(C) - (i) Vestigial, (ii) Anatomical

(D) - (i) Mutations, (ii) Multiplication


Crocodile and penguin are similar to Whale and Dogfish in which one of the following features?

Option: 1

Possess a solid single stranded central nervous system


Option: 2

Lay eggs and guard them till they hatch


Option: 3

Possess bony skeleton.


Option: 4

Have gill slits at some stage


The activity of a radioactive sample is measured as N0 counts per minute at t = 0 and N0/e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is

Option: 1

5 loge2


Option: 2

\log_{\text{e}}\frac{2}{5}


Option: 3

\frac{5}{\log_{\text{e}}2}


Option: 4

5\log_{\text{10}}5


The main arena of various types of activities of a cell is :

Option: 1

Nucleus


Option: 2

Plasma membrane


Option: 3

Mitochondrian


Option: 4

Cytoplasm


During mitosis ER and nucleolus begin to disappear at :

Option: 1

Early prophase


Option: 2

Late prophase


Option: 3

Early metaphase


Option: 4

Late metaphase


Which one is most reactive towards electrophilic reagent?

Option: 1


Option: 2


Option: 3


Option: 4


Whorled simple leaves with reticulate venation are present in

Option: 1

China Rose


Option: 2

Alstonia


Option: 3

Calotropis


Option: 4

Neem


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


Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and amplitudes. They pass each other, moving in opposite directions when their displacement is half of the amplitude. The mean positions of the two particles lie on a straight line perpendicular to the paths of the two particles. The phase difference is

Option: 1

\pi


Option: 2

\frac{\pi}{6}


Option: 3

0


Option: 4

\frac{2\pi}{3}


Two identical piano wires, kept under the same tension T have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which will lead to occurrence of 6 beats /s when both the wires oscillate together would be

Option: 1

0.04


Option: 2

0.01


Option: 3

0.02


Option: 4

0.03


A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source of 200 volt, 100 Hz is connected across the coil, the current in the coil will be

Option: 1

\frac{20}{\sqrt{13}}\text{A}


Option: 2

2.0 A


Option: 3

4.0 A


Option: 4

8.0 A


A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will:

Option: 1

Be doubled


Option: 2

Increase four times


Option: 3

Be reduced to half


Option: 4

Remain the same


What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes In its root tip cells ?

Option: 1

21


Option: 2

42


Option: 3

63


Option: 4

84


Which of the following is mainly produced by the activity of anaerobic bacteria on sewage ?

Option: 1

marsh gas


Option: 2

Laughing gas


Option: 3

propane


Option: 4

Mustard gas


Which of the following is least likely to behave as Lewis base?

Option: 1

H_{2}O


Option: 2

NH_3


Option: 3

BF_3


Option: 4

OH^{-}


Anther is generally

Option: 1

Monosporangiate


Option: 2

Bisporangiate


Option: 3

Hexasporangiate


Option: 4

Tetrasporangiate


Uterus is also known as

Option: 1

Hystera

 


Option: 2

Womb

 


Option: 3

Clitoris

 


Option: 4

Both a and b


Element used in Radioactive clock method to determine age of fossils is/are:

Option: 1

Uranium


Option: 2

Lead


Option: 3

Mercury

 


Option: 4

Both (a) and (b)


Oil eating bacteria (Pseudomonas putida) developed by 

Option: 1

Dr . Hargobind Khorana 


Option: 2

Paul Berg 


Option: 3

Prof. Ananda Mohan Chakrabarty


Option: 4

Stanley Cohen 


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