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The Nobel Prize in Chemistry, 2015 was awarded to ________ for "mechanistic studies of DNA repair".

ATomas Lindahl
BPaul L. Modrich
CAziz Sancar
DAll of these

Fossil fuels are formed when heat and pressure are applied to remains of dead animals and plants over millions of years. It is a kind of fuel source that we will run out of, if we are not careful. Which of the following is not a fossil fuel?

APetroleum
BNatural gas
CWater
DCoal

Runoff water from nearby crop fields enters a small lake. How will it affect the lake ?

AIt will cause the lake to dry up.
BIt will cause algae to grow in the lake.
CIt will cause the lake to become deeper.
DIt will cause water in the lake to become solid.

Select the correct match.

I am an American astronaut of Indian origin. I was assigned to the International Space Station. I hold the records for maximum spacewalks by a woman and the longest spaceflight for a woman. Who am I?


AKalpana Chawla
BMadhulika Guhathakurta
CSunita Williams
DKamlesh Lulla

How do we know that fission isn't responsible for the sun's energy ?

AFission doesn't produce enough energy per gram of fuel
BIf fission were going on in the sun, the sun would explode
CIf fission were going on in the sun, the sun's mass would increase
DThere isn't very much fissionable material in the sun.

Eight friends P, Q, R, S, T, U, V and W are sitting around a circle facing the centre. V is third to the right of Q and is second to the left of R. Q is second to the left of T and on the immediate right of S. U is between Q and T. P is not on the left of R. Which of the following is the correct position of W?

AOn the immediate left of V
BOn the immediate right of V
CBetween U and V
DOn the immediate right of R

Identify the rule followed in the number series given below.



AAdd 2 in previous term to get the next term
BMultiply previous term by 2 to get the next term
CSubtract 2, 4, ............ sequentially
DMultiply the number by itself to get the next term

Many inventors invented light bulbs, but it was him who invented an incandescent bulb that could burn for a long time. He was also the first inventor to be awarded a patent for this invention. Identify him.


ASamuel Morse
BAlexander Graham Bell
CThomas Alva Edison
DJohn Logie Baird

What is the standard form of 7,000 + 800 + 20 + 5?

A7,285
B7,825
C7,852
D7,528