Practice Test

Assertion (A) : Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R) : DNA fragments can be manipulated using restriction endonucleases and DNA ligases.

Which Indian personality has been honoured with the “Social Entrepreneur of the Year” award at The 7th Asian Awards in London?

Consider the following statements:
1. A student astronomer Ethan Kruse has found a self-lensing binary star system in the Lycra constellation by using the planet-hunting Kepler Space Telescope

2. KOI-3278 looks like an upside-down planet and it could pave the way for new method of studying binary star systems..

3. The two stars of KOI-3278, at a distance of about 2600 light-years (a light-year is 5.88 trillion miles) take turns being nearer to earth as they orbit each other in every 88.18 days.

4. The two stars are about 43 million miles apart, approx distance of planet Mercury from Sun.


5. The white dwarf, a cooling star thought to be in the final stage of life, is about Earth's size but 200000 times more massive.
Select the correct answer using the codes given below.