18th February 2023 Current Affairs Quiz for UPSC Prelims
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Question 1 of 5
1. Question
2 points
The Jamui mines of Bihar recently found mention in news because
Correct
Correct Answer: A
Explanation
As per a GSI survey, 222.88 million tonnes of gold reserve are present in Jamui. As per National Mineral Inventory data, total reserves of gold ore (primary) have been estimated at 501.83 million tonnes. States with largest gold resources: Bihar (44%), Rajasthan (25%), Karnataka (21%), West Bengal (3%), Andhra Pradesh (3%), Jharkhand (2 %).
Incorrect
Correct Answer: A
Explanation
As per a GSI survey, 222.88 million tonnes of gold reserve are present in Jamui. As per National Mineral Inventory data, total reserves of gold ore (primary) have been estimated at 501.83 million tonnes. States with largest gold resources: Bihar (44%), Rajasthan (25%), Karnataka (21%), West Bengal (3%), Andhra Pradesh (3%), Jharkhand (2 %).
Question 2 of 5
2. Question
2 points
The specie ‘Thiomargarita Magnifica’ recently seen in news for:
Correct
Correct Answer: B
Explanation
Thiomargarita Magnifica
• The bacteria was discovered in the mangroves of the Guadeloupe archipelago in the Caribbean.
• Named Thiomargarita Magnifica, they live by oxidizing sulfur and are 50 times bigger than any other known bacteria.
• “What is very unique about the T. Magnifica is that the entire filament, which is among the longest filaments in the mangrove, is just one cell”.
Incorrect
Correct Answer: B
Explanation
Thiomargarita Magnifica
• The bacteria was discovered in the mangroves of the Guadeloupe archipelago in the Caribbean.
• Named Thiomargarita Magnifica, they live by oxidizing sulfur and are 50 times bigger than any other known bacteria.
• “What is very unique about the T. Magnifica is that the entire filament, which is among the longest filaments in the mangrove, is just one cell”.
Question 3 of 5
3. Question
2 points
The term Avulsion in rivers often seen in news is specifically a:
Correct
Correct Answer: D
Explanation
Avulsion in Rivers
• Avulsion means a sudden cutting off of land by flood or change in course of a body of water. Avulsions are rare, occurring only once a decade or century, or even less.
• Avulsions are infrequent in nature compared to more frequent extreme weather events and the effect of sea-level rise.
• Rivers lining tropical and desert regions are more prone to avulsions.
Incorrect
Correct Answer: D
Explanation
Avulsion in Rivers
• Avulsion means a sudden cutting off of land by flood or change in course of a body of water. Avulsions are rare, occurring only once a decade or century, or even less.
• Avulsions are infrequent in nature compared to more frequent extreme weather events and the effect of sea-level rise.
• Rivers lining tropical and desert regions are more prone to avulsions.
Question 4 of 5
4. Question
2 points
The Isle of Wight recently seen in news is located in:
Correct
Correct Answer: A
Explanation
Palaeontologists have found the skeletal remains of the Europe’s largest meat-eating dinosaur on Isle of Wight.
• It is a county and the largest and second-most populous island of England. It is part of the historic county of Hampshire.
• The island lies off the south coast of England in the English Channel.
• It is separated from the mainland by a deep strait known as The Solent.
• The administrative centre of the unitary authority of the Isle of Wight is Newport.
• The backbone of the island is formed by a chalk ridge that extends across the entire breadth of the island, from Culver Cliff in the east to the Needles in the west.
• It is designated a UNESCO Biosphere Reserve.
Incorrect
Correct Answer: A
Explanation
Palaeontologists have found the skeletal remains of the Europe’s largest meat-eating dinosaur on Isle of Wight.
• It is a county and the largest and second-most populous island of England. It is part of the historic county of Hampshire.
• The island lies off the south coast of England in the English Channel.
• It is separated from the mainland by a deep strait known as The Solent.
• The administrative centre of the unitary authority of the Isle of Wight is Newport.
• The backbone of the island is formed by a chalk ridge that extends across the entire breadth of the island, from Culver Cliff in the east to the Needles in the west.
• It is designated a UNESCO Biosphere Reserve.
Question 5 of 5
5. Question
2 points
Consider the following statements with reference to the Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA):
1. Both DNA and RNA contain Adenine, Guanine and Thymine.
2. The structure of DNA is a single strand whereas RNA is a double strand molecule.
3. DNA is the chemical basis of heredity and have the coded message for proteins to be synthesized in the cell.
4. Cellular organisms use messenger RNA (mRNA) to convey genetic information that directs synthesis of specific proteins.
Which of the given statements is/are correct?
Correct
Correct Answer: B
Explanation
Statements 3 and 4 are correct, 1 is not correct.
DNA and RNA
• It has been observed that nucleus of a living cell is responsible for this transmission of inherent characters, also called heredity.
• The particles in nucleus of the cell, responsible for heredity, are called chromosomes which are made up of proteins and another type of biomolecules called nucleic acids.
• Nucleic acids are responsible for the transfer of characters from parents to off springs. There are two types of nucleic acids — DNA and RNA.
• A nucleic acid containing deoxyribose is called deoxyribonucleic acid (DNA) while that which contains ribose is called ribonucleic acid (RNA).
• Both DNA and RNA contain Adenine, Guanine and Cytosine. The fourth base is Thymine in DNA and Uracil in RNA.
Incorrect
Correct Answer: B
Explanation
Statements 3 and 4 are correct, 1 is not correct.
DNA and RNA
• It has been observed that nucleus of a living cell is responsible for this transmission of inherent characters, also called heredity.
• The particles in nucleus of the cell, responsible for heredity, are called chromosomes which are made up of proteins and another type of biomolecules called nucleic acids.
• Nucleic acids are responsible for the transfer of characters from parents to off springs. There are two types of nucleic acids — DNA and RNA.
• A nucleic acid containing deoxyribose is called deoxyribonucleic acid (DNA) while that which contains ribose is called ribonucleic acid (RNA).
• Both DNA and RNA contain Adenine, Guanine and Cytosine. The fourth base is Thymine in DNA and Uracil in RNA.