In thermodynamic processes which of the following statements is not true?
In an isochoric process pressure remains constant
In an isothermal process the temperature remains constant
In an adiabatic process = constant
In an adiabatic process the system is insulated from the surroundings
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
Absence of secondary phloem
Presence of cortex
Position of protoxylem
Absence of secondary xylem
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:
elongating
widening
differentiating
maturing
Transgenic plants are the ones:
generated by introducing foreign DNA into a cell and regenerating a plant from that cell.
produced after protoplast fusion in artificial medium.
grown in artificial medium after hybridization in the field.
produced by a somatic embryo in artificial medium.
The following compounds are given
a. CH3CH2OH
b. CH3COCH3
C. (CH3)2CHOH
d. CH3OH
Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?
a, c and d
Only b
a, b and c
a and b
A square current carrying loop is suspended in uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is the net force on the remaining three arms of the loop is
A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mms-1. The induced emf when the radius is 2 cm is
2 V
Which of the following pairs has the same size?
Zn2+, Hf4+
Fe2+, Ni2+
Zr4+, Ti4+
Zr4+, Hf4+
Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?
All are bilaterally symmetrical
Penguin is homoiothermic while the remaining three are poikilothermic
Leech is a fresh water form while all others are marine
Spongilla has special collared cells called choanocytes, not found in the remaining three
The genotype of a plant showing the dominant phenotype can be determined by
Back cross
Test cross
Dihybrid cross
Pedigree analysis
A common biocontrol agent for the control of plant diseases is
Trichoderma
Baculovirus
Bacillus thuringiensis
Glomus
Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?
5' CACGTA 3';
3' CTCAGT 5'
5' CGTTCG 3';
3' ATGGTA 5'
5' GATATG 3';
3' CTACTA 5'
5' GAATTC 3';
3' CTTAAG 5'
The thermo e.m.f E in volts of a certain thermocouple is found to vary with temperature difference in between the two junctions according to the relation
The neutral temperature for the thermocouple will be
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
Only one X chromosome
One X and one Y chromosome
Two X chromosome
Only one Y chromosome
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed, the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is
-30 cm
5 cm
-10 cm
20 cm
The unit of rate constant for a zero order reaction is :
L2 mol-2 s-1
s-1
mol L-1 s-1
L mol-1 s-1
A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0 m/s2. If g = 10 ms-2, the tension in the supporting cable is:
1200 N
8600 N
9680 N
11000 N
In forward biasing of the p-n junction
The positive terminal of the battery is connected to p -side and the depletion region becomes thin
The positive terminal of the battery is connected to p-side and the depletion region becomes thick
The positive terminal of the battery is connected to n-side and the depletion region becomes thin
The positive terminal of the battery is connected to n-side and the depletion region becomes thick
Nitrifying bacteria
Reduce nitrates to free nitrogen
Oxidize ammonia to nitrates
Convert free nitrogen to nitrogen compounds
Convert proteins into ammonia
Which one of the following is the most widely accepted method of contraception in india, as at present ?
IUD's (Intra uterine devices)
Cervical caps
Tubectomy
Diaphragms
The sex of zygote gets decided during , the zygote formation sexuality of child depends
Zygote carrying XY would be male
Zygote carrying XX would be male
Zygote carrying XX would be female
Both (a) and (c)
Offsprings of oviparous animals are at greater risk of survival as compared to those of viviparous animals because
Proper embryonic care and protection is absent
Embryo does not develop completely.
Progenies are of smaller size
Genetic variations do not occour
The proponent of the theory of spontaneous generation was:
Louis Pasteur
Von Helmont
Spallanzani
Francisco Redi
Select the correct options for Australian realm:
It's over Australia and New Zealand only
The important animals are ceratodus, enya, kiwi etc.
It is one of the largest realm
Bothe (a) and (b)
Organ system level of organisation shown by:
Porifera
Coelentrata
Ctenophora
Platyhelminthes