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UPSC Prelims 2027 CGS Test-20
UPSC Prelims 2027 CGS Test-20
1. Recently, seasonal fishing restrictions took effect off Puri to protect Olive Ridley turtles. In this context, consider the following pairs concerning coastal features:
- Chilika — brackish-water lagoon
- Pulicat — freshwater lake
- Gahirmatha — marine wildlife sanctuary
- Devi River — tributary of the Mahanadi
Which of the pairs given above are correctly matched?
[A] 2 & 3
[B] 1 & 4
[C] 1, 2 & 3
[D] 1 & 3
Show Answer
Correct Answer: D [1 & 3]
Notes:
Item 1 is correct: Chilika is a brackish-water lagoon on Odisha’s east coast, with salinity varying across the water body. Item 2 is incorrect: Pulicat is a brackish-water lagoon spanning Andhra Pradesh and Tamil Nadu, not a freshwater lake. Item 3 is correct: Gahirmatha is a marine wildlife sanctuary in Odisha and is identified as a major Olive Ridley nesting beach. Item 4 is incorrect: The Devi is a principal distributary of the Mahanadi; it flows through Odisha to the Bay of Bengal.
2. Consider the following marine protected areas:
- Gahirmatha Marine Sanctuary
- Gulf of Mannar Marine National Park
- Mahatma Gandhi Marine National Park
- Rani Jhansi Marine National Park
How many of the above are marine national parks?
[A] All four
[B] Only three
[C] Only one
[D] Only two
Show Answer
Correct Answer: B [Only three]
Notes:
Gahirmatha is a marine wildlife sanctuary, not a marine national park. Gulf of Mannar, Mahatma Gandhi, and Rani Jhansi are marine national parks. Therefore, three of the four listed areas are marine national parks.
3. Consider the following grassland ecosystems:
- Shola grasslands
- Semi-arid and arid grasslands
- Bugyals
How many of the above are found in the Western Ghats?
[A] Only one
[B] Only two
[C] All three
[D] None
Show Answer
Correct Answer: A [Only one]
Notes:
Only Shola grasslands are found in the Western Ghats, where they occur at high elevations in mosaics with evergreen Shola forests. Semi-arid and arid grasslands are found mainly in western India and parts of the Deccan Plateau. Bugyals are alpine pastures in the Himalayas, above the tree line. Therefore, only one of the listed ecosystems occurs in the Western Ghats.
4. Which of the following Indian intellectual property registrations may be renewed indefinitely?
- Patent
- Copyright
- Trademark
- Industrial design
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 3
[D] Only 3 & 4
Show Answer
Correct Answer: C [Only 3]
Notes:
Trademark registration is valid for ten years and may be renewed for successive ten-year periods indefinitely. A patent generally lasts 20 years from its filing date and cannot be renewed or extended. Copyright protection lasts for a term prescribed by law, which varies according to the work and author; it is not an indefinitely renewable registration. Industrial-design registration generally lasts ten years and may be extended once for a further five years. Therefore, only trademark registration may be renewed indefinitely.
5. Which of the following molecules directly carries the genetic message or delivers amino acids during translation?
- rRNA
- DNA
- mRNA
- tRNA
Select the correct option from the codes given below:
[A] 1 & 3
[B] 1, 3 & 4
[C] 2 & 4
[D] 3 & 4
Show Answer
Correct Answer: D [3 & 4]
Notes:
Item 1 is incorrect: rRNA is a key component of ribosomes, not the message- or amino-acid-carrying molecule asked for. Item 2 is incorrect: DNA serves as a template for transcription; translation reads mRNA. Item 3 is correct: The ribosome reads mRNA’s genetic sequence during protein synthesis. Item 4 is correct: tRNA carries amino acids and pairs its anticodon with an mRNA codon.
Originally written on
November 10, 2026
and last modified on
November 10, 2026.
