[Solutions]
Q1. Genetically engineered mosquitoes are being suggested to fight mosquito borne diseases. How will such mosquitoes help in fight against Dengue and Malaria?
a) The GM mosquitoes will predate on mosquitoes that carry the disease
b) The GM mosquitoes will procreate with existing mosquitoes and produce off-springs that cannot mature
c) The GM mosquitoes will slowly increase in population replacing normal mosquitoes.
d) The GM mosquitoes’ blood will be used to develop vaccines for Dengue and Malaria
Ans – [B]
Genetically modified mosquitoes work with the single goal of reducing the total number of mosquitoes , who act as carriers of the disease. GM Mosquitoes procreate with the existing mosquito population such that the progeny is incapable of maturing or further reproduction.
In India one company Gangabishan Bhikulal Investment and Trading Ltd. (GBIT), a sister company of the Maharashtra Hybrid Company (Mahyco) that first brought Bt cotton to India, has been breeding genetically modified male mosquitoes(Aedes aegypti) to combat Zika virus.
Genetical modification is modification of the genome of the organism using Genetic engineering techniques. This has long been the practice to breed select individuals of a species in order to produce offspring that have desirable traits.
Malaria is one of the most deadly diseases in the world, killing 500,000 people annually and sickening hundreds of millions. It is caused by Anopheles mosquito.
Dengue caused by Aedes aegypti gives a fever which is so excruciating that it is often called the “bone breaker,” causing severe pain in the joints and abdomen along with vomiting, and circulatory system failure.
Q2. Consider the following statements regarding Bhuvan.
1. Bhuvan is a satellite mapping tool closely resembling Google Maps
2. Bhuvan has been indigenously developed by DRDO
Select the correct statement using the codes given below.
a) 1 only
b) 2 only
c) Both 1 & 2
d) Neither 1 nor 2
Ans – [D]
Bhuvan is a sanskrit word for Earth.
It is most similar to Google Earth or Wikimapia and not Google Maps.
It is developed by ISRO and it is a freeware Geographical information system- providing 2D and 3D visualisation services and Earth observation data to users in public domain. It was started in 2009 with simple display of satellite data and basic GIS functionality with many thematic maps on display.. It services users for their remote sensing application needs. It has grown horizontally in diverse areas of applications and vertically in terms of number of image and map services, for ex: – ENVIS program of Ministry of Environment, Forests & Climate Change is actively using Bhuvan services., it is also providing active support for flagship programmes of the government including Integrated Watershed Development Program (Srishti-Drishti), National Mission for Clean Ganga, AMRUT etc. Today, Bhuvan is exclusively used by Punjab, Karnataka, Himachal Pradesh, Andhra Pradesh and North Eastern states.
It provides 1m resolution satellite data for more than 350 cities. It freely accessible on the Internet and used by wide varieties of user community including school children. You must go to its website and look around your city.
It also provides technical help in disaster management during catastrophic events like Cyclone, Floods, Landslides, Earthquakes, Forest Fire and Drought. Uttarakhand disaster in 2013, J&K floods and Hudhud Cyclone in 2014 and Nepal Earthquake in 2015 are some of the examples where Bhuvan provided unique services in terms of online disaster information update, forecasts and post-disaster scenario.
As it provides 2D and 3D representation of the surface of the earth. Therefore it closely resembles Google Earth.
Q3. Which among the following are the field of application of Independent Regional Navigation Satellite System (IRNSS):
1. Aerial Navigation
2. Terrestrial Navigation
3. Vehicle Tracking
4. Geodetic Data Capture
Select the correct answer using the codes given below:
a) 1 and 2 only
b) 1, 2 and 3 only
c) 2, 3 and 4 only
d) 1, 2, 3 and 4
Ans – [D].
All the statements pertaining to IRNSS are correct.
Q4. Trace Gas Orbiter (TGO) is a
a) Jointly Launched Mars Mission by China Space Agency and NASA
b) Jointly proposed Mars mission by NASA and ISRO
c) Jointly launched Mars Mission by Russian and European Space Agency.
d) None of the above
Ans – [C]
The ExoMars Trace Gas Orbiter (TGO) is a collaborative project between the European Space Agency (ESA) and the Russian Federal Space Agency (Roscosmos) to send an atmosphere research orbiter and the Schiaparelli demonstration lander to Mars in 2016 as part of the European-led ExoMars Programme.
Q5. Red light is used in railway signals for “stop”. The reason behind using red light for this purpose is
a) Red light have always been used as a signal of danger.
b) The wavelength of red light is maximum in visible light spectrum and hence dispersion is minimum.
c) The wavelength of red light is minimum in visible light spectrum and hence dispersion is minimum.
d) The wavelength of red light is maximum in visible light spectrum and hence diffraction is minimum.
Ans – [B]
Q6. To create lesser e-waste, wireless charging has emerged as a promising solution. Wireless charging works on the principle of:
a) Li-Fi
b) Electromagnetic induction
c) LASER
d) Wi-Fi
Ans – [B]
Wireless charging inductive charging) uses an EM field to transfer energy between two objects. Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the EM field and converts it back into electrical current to charge the battery.
Q7. Consider the following statements about Rechargeable Magnesium Battery?
1. It is a substitute to Lead Acid Battery.
2. Consists of natural graphite as cathode and magnesium as anode.
3. Battery’s life is self-renewing.
Which of the following statements is/are not correct?
a) 1 only
b) 1 and 2 only
c) 3 only
d) None of the above
Ans- [D]
Rechargeable Magnesium battery have a life of 2-3 years.
For more refer this link : http://timesofindia.indiatimes.com/city/hyderabad/Rechargeable-magnesium-battery-developed-at-IICT/articleshow/41709979.cms
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