Daily Current Affairs Quiz 16 April 2023

a) Dinoflagellates

Bioluminescence occurs due to the presence of some marine planktons called dinoflagellates that produce light when the water is disturbed. These planktons emit light on the ocean surface at night. Bioluminescent is widespread among deep sea animals in general. Many marine creatures like sponges, jellyfish, worms, species of fish, anthropods, echinoderms and unicellular alga exhibit bioluminescence to either evade predators, attract prey or during mating. In Visakhapanam, this phenomenon is most likely the result of an algal bloom of the dinoflagellate species of noctiluca and ceratium.

Visakhapatnam beaches are glowing due to a phenomenon called bioluminescence.

c) Antibiotic drug

Colistin is an antibiotic drug which is used to treat bacterial infections caused by susceptible Gram negative bacteria. Generally, it is used as a last resort when all other drugs do not respond. It is also called as polymyxin E
Recently, researchers in Los Angeles of USA have found bacteria that resist this drug in the US county’s wastewaters.

b) Mozambique

External Affairs Minister Dr. S. Jaishankar inaugurated the Buzi Bridge built by India in Mozambique. The bridge has been built as part of the 132 km Tika-Buji-Nova-Sofala road project. External Affairs Minister Dr S Jaishankar began his visit with a meeting with the Speaker of the Assembly Esperanca Bias in Maputo, Mozambique. Mozambique is a southern African nation with a long coastline along the Indian Ocean. Its capital is Maputo and its currency is the Mozambican medical.

b) International Atomic Energy Agency

Incident and Trafficking Database (ITDB) is International Atomic Energy Agency’s (IAEA’s) information system of incidents of unauthorized activates and illicit trafficking involving radioactive materials outside the purview of regulatory control.
As per the recently released annual fact sheet of ITDB a total of 146 incidents of illegal or unauthorized activities involving nuclear and other radioactive material were reported in the year 2022.

d) Both 1 and 2

Magnetoresistance is the tendency of a material (often ferromagnetic) to change the value of its electrical resistance in an externally-applied magnetic field. The magnetoresistance observed in the graphene-based device was “almost 100 times higher than that observed in other known semimetals in this magnetic field range.” Hence, statement 1 is correct.

It is used in hard disk drives and magneto resistive RAM in computers, biosensors, automotive sensors, microelectromechanical systems, and medical imagers etc. Hence, statement 2 is correct.

Researchers in the UK, led by Nobel laureate Andre Geim, have discovered that graphene displays an anomalous giant magnetoresistance (GMR) at room temperature.