Daily Current Affair Quiz: 22nd July 2019
1. Which of the following statements are true:
1. Gravitational waves are ripples in spacetime travelling at the speed of light.
2. Gravitational waves passing through an object distort that object’s shape, stretching and squeezing it in the direction the wave is travelling.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans:c
Justification:
- Gravitational waves are ripples in spacetime travelling at the speed of light. They’re produced when bodies with mass accelerate, changing the curvature in spacetime around them, with those changes then spreading outwards from their source as waves.
- Gravitational waves passing through an object distort that object’s shape, stretching and squeezing it in the direction the wave is travelling.
- Gravitational wave detectors can pick up these distortions by splitting laser light into two perpendicular beams that travel for several kilometres before being reflected back to a detector.
2. Which of the following statements are true:
1. Government e-Marketplace (GeM) is a one stop portal to facilitate online procurement of common use Goods & Services required by various Government Departments / Organizations / PSUs.
2. The purchases through GeM by Government users have been authorized and made mandatory by Ministry of Finance.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans:c
Justification:
- Government e-Marketplace (GeM) is a one stop portal to facilitate online procurement of common use Goods & Services required by various Government Departments / Organizations / PSUs.
- GeM aims to enhance transparency, efficiency and speed in public procurement. It provides the tools of e-bidding, reverse e-auction and demand aggregation to facilitate the government users achieve the best value for their money.
- The purchases through GeM by Government users have been authorized and made mandatory by Ministry of Finance by adding a new Rule
3. The gravitational waves are caused by
(a) Colliding black holes
(b) Merging neutron stars
(c) Exploding stars
(d) All of the above
Ans: d
Justification:
- The gravitational waves that LIGO seeks to detect are caused by some of the most energetic events in the Universe colliding black holes, merging neutron stars, exploding stars, and possibly even the birth of the Universe itself.
- Detecting and analyzing the information carried by gravitational waves is now allowing us to observe the Universe in a way never before possible.
4. Which of the following statements are true:
1. Sunderban biosphere reserve is located at the Estuaries of River Ganges and River Brahmaputra.
2. It is a UNESCO World Heritage site.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans:c
Justification:
- Location – Estuaries of River Ganges and River Brahmaputra. The reserve is also a UNESCO World Heritage site, as it is the largest mangrove forest area in the world.
- Fauna – The reserve is famous as the breeding ground of the Royal Bengal Tiger. Spotted deer, Rhesus Macaque, Salt Water Crocodile and Giant Adjutant Storks are some other attractions
- Flora – World’s largest mangrove forest hosts several endemic species of plants such as Garjan, Gewa, Goran, Keora and Sundari trees. The name Sundarbans refers to the abundance of Sundari trees in the area.
5. Which of the following is not apart of nitrogenous bases found in DNA?
(a) Adenine
(b) Thymine
(c) Guanine
(d) Uracil
Ans: d
Justification:
- There are four nitrogenous bases found in DNA that are called guanine, adenine, thymine and cytosine.
- The nitrogenous bases in RNA are the same, with one exception: adenine (A), guanine (G), uracil (U), and cytosine (C).
