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Polymerase chain reaction is most useful in which of the following process? (A) DNA synthesis (B) DNA amplification (C) Protein synthesis (D) Amino acid synthesis

DNA amplification PCR or Polymerase Chain Reaction is a technique used in molecular biology to create several copies of a... View Article

Which of the following has non myelinated nerve fiber? (A) Optic nerves (B) Cranial nerves (C) Spinal nerves (D) Autonomic nerves

Autonomic nerves A protective covering that surrounds fibers called axons is called Myelin sheaths. Myelin sheaths are sleeves or covering... View Article

The variation of potential with distance R from the fixed point is shown in figure. The electric field at R = 5 m is:(A) 2.5 Vm^-1(B) -2.5 Vm^-1(C) 0.4 Vm^-1(D) -0.4 Vm^-1

Given We know, Electric field intensity, E = -dV/dt where V is the potential Electric field intensity, E = -(0... View Article

The group number and period of the chromium in the periodic table are, respectively: (A) 6 and 3 (B) 5 and 3 (C) 6 and 4 (D) 5 and 4

The atomic number of chromium is 24 Electronic configuration – 1s22s22p63s23p64s23d5 Outermost orbit = 4s The Period of the element... View Article

Rectangle ABCD has area 200. An ellipse with area 200pi passes through A and C and has foci at B and D. Find the perimeter of the rectangle

Let x, y be the length of the rectangle. Let the axis of the ellipse on which the foci lie... View Article

Carbon monoxide is a major pollutant of (A) Water (B) Air (C) Noise (D) Soil

Air Carbon monoxide is major pollutant in air exhausted by various automobiles. Carbon monoxide combines with haemoglobin in blood and... View Article

Branches of a tree move and bend freely in high wind velocity. Give reason

Junction of the tree branch composed of collenchyma cells which provide rigidity and flexibility to the branches. Hence, due to... View Article

The cerebellum is concerned with __________ (A) Memory (B) Vision (C) Perception (D) Coordination of muscular movements

coordination of muscular movements. The cerebellum is the second largest part of the brain, located in the posterior portion of... View Article

Assertion: Ortho and para-nitrophenol can be separated by steam distillation. Reason: Para-nitrophenol is steam volatile due to intramolecular hydrogen bonding. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

If assertion is true but reason is false O-Nitrophenol is steam volatile due to intramolecular hydrogen bonding while p-nitrophenol is... View Article

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplies by the t motor will be: (A) 20 watt (B) 200 watt (C) 2 watt (D) 10 watt

We know that, Work done = Force x Distance Work done = 40 x 30 = 1200 J Using the... View Article

Edible part of guava is (A) Thalamus and pericarp (B) Entire fruit (C) Endocarp (D) None of the above

Thalamus and pericarp Guava is a berry which is a simple succulent type of tree fruit which has a fleshy... View Article

In the year 2011 oilzapper was in the news. What is it? (A) It is an eco-friendly technology for the remediation of oily sludge and oil spills (B) It is the latest technology developed for under-sea oil exploration (C) It is genetically engineered high biofuel- yielding maize variety (D) It is the latest technology to control the accidentally caused flames from oil wells

It is an eco-friendly technology for the remediation of oily sludge and oil spills. Hence, the correct option (A)

Which of the following is absent in plant cell? (A) Vacuole (B) Centriole (C) Cell membrane (D) Mitochondria

Centriole Centrioles are the part of centrosome located near the nucleus in the animal cell and some lower plant cells.... View Article

Point out the correct method of showing the scientific name of coconut palm derived by binomial nomenclature (A) Cocos nucifera (B) Cocos Nucifera (C) cocos Nucifera (D) cocos nucifera

Cocos nucifera The scientific name is used to identify the organisms and to avoid the confusion created by the local... View Article

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction takes place: Zn+2HCl →ZnCl2 + H2 Calculate the volume of hydrogen gas is liberated at STP when 32.65 g of zinc reacts with HCl. 1 mole of a gas occupies 22.7 L volume at STP; atomic mass of Zn = 65.3 u? (A) 10.03 L (B) 11.35 L (C) 11.57 L (D) 9.53 L

Given Mass of Zn = 32.65 g 1 mole of gas occupies = 22.7 L volume at STP Atomic mass... View Article

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