SCIENCE & CURRENT AFFAIRS MCQ SET-38- FRAMED FROM THE HINDU & WIKEPEDIA
Q.1 Recently which among the following state has adopted fly ash utilization policy ? A) Maharashtra B) Punjab C) Karnataka D) Tamil Nadu Ans. A Fly ash is a fine, glass powder by-product recovered from gases of burning coal in thermal power plants during production of electricity. They are micron sized earth elements primarily consisting silica, alumina and iron. Fly ash causes air pollution. It can also contaminate water and soil systems. The wet disposal of Fly ash results in leaching of toxic heavy metals in ground water system. Q.2 DNA Index System (DIS) allows generation of DNA profiles from which of the following samples : 1. Saliva 2. Blood strains 3. Buccal Swabs Select the correct answer using the codes given below : A) Only 1 B) 1 & 3 C) 1,2,3 D) 1 & 2 Ans. C DNA profiling (also called DNA fingerprinting, DNA testing, or DNA typing) is a forensic technique used to identify individuals by characteristics of their DNA. A DNA profile is a small set of DNA variations that is very likely to be different in all unrelated individuals, thereby being as unique to individuals as are fingerprints (hence the alternate name for the technique). DNA profiling should not be confused with full genome sequencing. DNA fingerprinting has also been widely used in the study of animal and floral populations and has revolutionized the fields of zoology, botany, and agriculture A common method of collecting a reference sample is the use of a buccal swab, which is easy, non-invasive and cheap. When this is not available (e.g. because a court order is needed but not obtainable) other methods may need to be used to collect a sample of blood, saliva, semen, or other appropriate fluid or tissue from personal items (e.g. a toothbrush, razor) or from stored samples (e.g. banked sperm or biopsy tissue). Samples obtained from blood relatives (related by birth, not marriage) can provide an indication of an individual’s profile, as could human remains that had been previously profiled. Using PCR technology, DNA analysis is widely applied to determine genetic family relationships such as paternity, maternity, siblingship and other kinships. Familial DNA searching (sometimes referred to as “Familial DNA” or “Familial DNA Database Searching”) is the practice of creating new investigative leads in cases where DNA evidence found at the scene of a crime (forensic profile) strongly resembles that of an existing DNA profile (offender profile) in a state DNA database but there is not an exact match. Q.3 HIMANSH often in the news is : A) Glaciological research station B) Submarine vessel C) Micro satellite D) Nuclear Vessel Ans. A A high altitude glaciological research station in Himalaya called Himansh (meaning a slice of ice) began functioning above 13,500 ft (4000 m) in a remote region in Spiti, Himachal Pradesh. The station houses instruments to quantify glacier melting and its relation to changing climate. It will also serve as the base for Terrestrial Laser Scanners (TLS) and Unmanned Aerial Vehicles (UAVs) for undertaking surveys. Q.4 How recently developed Zika replicon system will be helpful in developing vaccine for Zika virus ? 1. It will deteriorate the structure of the virus by deleting some of its genes 2. Replicons are the segments of viral genome that are dependent of the cellular chromosome 3. They will be used to locate portions of the viral molecule that block or halt viral replication Select the correct answer using the codes given below : A) Only 2 B) 2 & 3 C) Only 1 & 3 D) All are correct Ans. C Replicons are basically segments of viral genome that can replicate on their own, independent of the cellular chromosome. It has also become important to deal with Zika virus which is spreading rapidly and behaves differently than other viruses as it can be transmitted sexually and is associated with microcephaly and Guillain-Barre syndrome (GBS). Q.5 In context with the news what is Digishala ? A) 24 hour government TV channel for cashless lessons B) TV series to be launched for cashless lessons C) A short film based on cashless lessons D) None of the above Ans. A Q.6 Jaguar DARIN III often in the news is : A) Twin seat aircraft B) Anti tank missile C) Rocket launcher D) Submarine vessel Ans. A Q.7 What is Urja Ganga, that has been recently in news ? A) It is a mission to clean holy river by 2020 B) It is a project of Gas pipeline to provide cooking gas C) It aims to reduce pollutants from Ganga river D) None of the above Ans. B Q.8 Recently in the news there was a term “Selfie Stick”. What is this ? A) A micro satellite B) A printer C) A Graphene transistor D) A newly launched i-phone Ans. A The micro-satellite Banxing-2 is roughly the size of a desktop printer and the media has nicknamed “Selfie Stick”. It weighs 47 kilogrammes. Micro satellites weigh around 500 to 100 kilograms. They are usually cheaper, faster and more advanced than traditional satellites. The commercial potential has attracted much attention from businesses. Q.9 Recently Mitochondrial replacement therapy has been in news, consider the following statements : 1. It involves invitro & invivo fertilization technique to replace defective mitochondria 2. Through this technique embryo remains free from all the defects Select the correct answer using the codes given below : A) Only 1 B) Only 2 C) Both are correct D) Both are incorrect Ans. D It involves invitro fertilization technique to replace defective mitochondria 2nd statement is fabricated statement, as it can’t be free from all the defects Mitochondrial replacement (MRT, sometimes called mitochondrial donation) is a special form of in vitro fertilisation in which the future baby’s mitochondrial DNA comes from a third party. This technique is used in cases when mothers carry genes for mitochondrial diseases. The two most common techniques in mitochondrial donation are pronuclear transfer and maternal spindle transfer. In 2015 MRT was made legal in
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