Science & Technology GK Questions with Answers – Page 5

A hydrogen fuel cell joins hydrogen with oxygen from the air to make electricity, and the only product that leaves the exhaust is water.

The transcriptome is the complete set of RNA transcripts, chiefly messenger RNA, made from the genes at a given time.

Rafale, MiG-29 and Tejas Mk-1 are all fourth or 4.5 generation fighters; none of them is a fifth-generation aircraft. A fifth-generation fighter is defined by all-aspect stealth, internal weapons bays, supercruise and advanced sensor fusion.

A blockchain is an open, shared ledger that no single party controls, and anyone can build on a public blockchain without asking permission.

VLC sends data with visible light, which is fast and free of radio interference, but it works only over short distances.

Pronuclear transfer is a mitochondrial replacement technique that stops a mother from passing faulty mitochondria to her child. Mitochondria have their own small DNA, inherited only from the mother; defects in it cause serious muscle, heart and brain diseases.

The real hurdles are the high technology needed to build algae plants and the very large scale they need to pay off; algae can be grown on land.

Open APIs let any device or application connect to Aadhaar's authentication service, and that service accepts iris scans as well as fingerprints, OTP and demographic data.

Placed in a cavern under about 1,300 metres of rock at Pottipuram in the Bodi West Hills, it is designed to catch atmospheric neutrinos and measure how they change from one flavour to another, the phenomenon of neutrino oscillation; the magnetic field lets it tell a neutrino from an antineutrino.

The site was chosen for its flat, seismically quiet ground, the Union Cabinet approved the project in principle in 2016 and in full in April 2023, and it is being executed by the Department of Atomic Energy and the Department of Science and Technology with IPR, RRCAT Indore and IUCAA…

Gravitational waves are ripples in space-time thrown out by violent events such as the merger of two black holes, and they follow from the general theory of relativity that Einstein published in 1915, with the prediction of the waves set out in 1916.

Fusion is the joining of two light nuclei into a heavier one, with a neutron or other products released and a large amount of energy appearing because the mass of the product is slightly less than the mass of the reactants; in ITER the reaction fuses deuterium and tritium into…

A hydrogen bomb, also called a thermonuclear bomb, uses a fission explosion only as a trigger; the main energy comes from the fusion of the heavy hydrogen isotopes deuterium and tritium into helium at temperatures of millions of degrees, which is why the process is described as thermonuclear or thermal…

This institute of the Department of Atomic Energy is the national centre for plasma and fusion research, it houses the domestic agency ITER-India that supplies India share of the machine, and it operates India own tokamaks Aditya and SST-1, the Steady State Superconducting Tokamak.

ITER is coming up at Saint-Paul-les-Durance in the Cadarache area of southern France, and its seven partners are the European Union, China, India, Japan, Russia, South Korea and the United States; the name is the Latin word for the way.

These are the two general purpose detectors on the LHC ring, and in July 2012 both independently reported a new particle of about 125 giga-electronvolts that matched the Higgs boson, the particle linked to the field that gives mass to other particles; the Nobel Prize in Physics of 2013 went…

The European Organization for Nuclear Research, founded in 1954, has its campus at Meyrin on the outskirts of Geneva in Switzerland, and because its tunnels run under the border, parts of the laboratory lie in France as well.

The Large Hadron Collider occupies a circular tunnel about 27 kilometres around, lying roughly 100 metres below the ground on the Swiss-French border near Geneva, and it is the largest and most powerful particle accelerator ever built; the tunnel was originally dug for an earlier CERN machine, the Large Electron-Positron…

Bt cotton carries genes from the soil bacterium Bacillus thuringiensis, which make the plant produce a protein toxic to bollworm larvae.

The Genome India Project was launched in January 2020 by the Department of Biotechnology, which works under the Ministry of Science and Technology, and brings together about twenty academic institutions to sequence Indian genomes and build a reference set that reflects the country's genetic diversity.