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Name the stage of cell cycle at which one of the following events occur: (A) Chromosomes are moved to spindle equator. (B) Centromere splits and chromatids separate. (C) Pairing between homologous chromosomes takes place. (D) Crossing over between homologous chromosomes takes place.

(A) Chromosomes are moved to the spindle equator in the Metaphase. (B) Centrosomes split and chromatids separate in the Anaphase... View Article

The extra embryonic membrane that involve in the formation of the placenta in human is (A) Chorion (B) Allantois (C) Yolk sac (D) Amnion

Chorion The placenta is defined as an organ that develops during pregnancy in mammals. The placenta provides oxygen and nutrients... View Article

From a given sample of uniform wire, two circular loops p and q are made, P of radius r and Q of radius nr. If the M.I of Q about its axis is 4 times than that of P, then value of n is: (A) (4)^1/3 (B) (4) ^2/3 (C) (4)^1/4 (D) (4)^1/2

Given that two circular loops P and Q are made, P of radius r and Q of radius nr. Let... View Article

Write a square matrix of order 2, which is both symmetric and skew symmetric

For a symmetric matrix = AT ….. (1) For a skew symmetric matrix = -AT …… (2) Adding on (1)... View Article

What is rib cage?

Ribs are the long curved bones which constitute the rib cage. They articulate posteriorly with the vertebral column and terminates... View Article

04 Oct 2021: UPSC Exam Comprehensive News Analysis

Oct 4th, 2021, CNA:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related HISTORY 1. Chola inscriptions on civic... View Article

03 Oct 2021: PIB Summary & Analysis

Electricity (Transmission System Planning, Development and Recovery of Inter-State Transmission Charges) Rules 2021 Context: Electricity (Transmission System Planning, Development and... View Article

0.4i+0.8j+ck represents a unit vector when c is

1) -0.2 2) √0.2 3) √0.8 4) 0 Answer: 2) √0.2 Solution: \(\begin{array}{l}\sqrt{(0.4)^{2}+(0.8)^{2}+c^{2}} = 1\end{array} \) = 0.16 + 0.64 +c2 = 1 =... View Article

A particle of mass 2 mg moves with constant speed and is found to pass two points 5.0 m apart in a time interval of 5 ms. Find the kinetic energy of the particle

1) 1 J 2) 2 J 3) 3 J 4) 4 J Answer: 1) 1 J Solution: Velocity = Distance/Time =... View Article

A spring of force constant 800 Nm^-1 has an extension of 5cm. The work done in extending it from 5 cm to 15 cm is

1) 16 J 2) 8 J 3) 32 J 4) 24 J Answer: 2) 8 J Solution: Force constant, k =... View Article

A bullet of mass 10 g is fired horizontally with a velocity 1000 ms^-1 from a rifle situated at a height 50 m above the ground. If the bullet reaches the ground with a velocity 500 ms^-1, the work done against air resistance in the trajectory of the bullet is (take g = 10 m^-2)

1) 5005 J 2) 3755 J 3) 3750 J 4) 17.5 J Answer: 2) 3755 J Solution: Work done against the... View Article

A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time, the particle goes up is

1) –0.5 J 2) –1.25 J 3) 1.25 J 4) 0.5 J Answer: 2) –1.25 J Solution: Mass = 100 g... View Article

A body moves a distance of 10 m along a straight line under action of 5 N force. If work done is 25 J, then the angle between the force and direction of motion of the body will be

1) 75° 2) 60° 3) 45° 4) 30° Answer: 2) 60° Solution: Distance, S = 10 m Force, F = 5... View Article

When a force is applied to a moving body, its motion is retarded. Then, the work done is

1) positive 2) negative 3) zero 4) positive and negative Answer: 2) negative Solution: Work is said to be done on... View Article

Force of 50 N acting on a body at an angle θ with horizontal. If 150 J work is done by displacing it 3 m, then θ is

1) 60° 2) 30° 3) 0° 4) 45° Answer: 3) 0° Solution: The horizontal component of force = Fcos θ Work... View Article

A spring stores 1 J of energy for compression of 1 mm. The additional work to be done to compress it further by 1 mm is

1) 1 J 2) 2 J 3) 3 J 4) 4 J 5) 0.5 J Answer: 3) 3 J Solution: W1... View Article

A ball is dropped from a height of 20 m. If the coefficient of restitution is 0.9, what will be the height attained after the first bounce?

1) 1.62 m 2) 16.2 m 3) 18 m 4) 14 m Answer: 2) 16.2 m Solution: Ball is dropped from... View Article

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