11. Which among the following sets of fauna represents same taxonomical order?
[A] Whales, Dolphins, Porpoises
[B] Dolphins, Porpoises, Dugong
[C] Whale, Dugong, Porpoises
[D] Dolphins, Dugong, Manatees
Show Answer
Correct Answer: A [ Whales, Dolphins, Porpoises ]
Notes:
Marine mammals are a diverse group of animals. They include cetaceans (whales, dolphins, and porpoises), sirenians (manatees and dugong), pinnipeds (true seals, eared seals and walrus), a few otters (the sea otter and marine otter) and the polar bear (usually grouped with the marine mammals).
12. Gargling with a solution of table salt is known to provide relief for a sore throat because ____ ?
[A] It kills bacteria
[B] It works as analgesic
[C] It dehydrates water from inflammatory tissues by Osmosis
[D] None of the above reasons
Show Answer
Correct Answer: C [ It dehydrates water from inflammatory tissues by Osmosis]
Notes:
Gargling with a solution of table salt is known to provide relief for a sore throat because it dehydrates water from inflammatory tissues by Osmosis. Gargling with salt water helps cure the throat infection.
13. Which organelle is associated with formation of basal granules & flagella?
[A] Centrosome
[B] Golgi apparatus
[C] Mitochondria
[D] Lysosome
Show Answer
Correct Answer: A [ Centrosome]
Notes:
Centrosome is an organelle that serves as the main microtubule organizing centre (MTOC). Basal granules are cellular organelles that are similar to the centriole in structure and are found at the base of a cilium or flagellum.
14. Which blood group among the following is known as universal donor? (UPSC Prelims 1982)
[A] A
[B] B
[C] O
[D] AB
Show Answer
Correct Answer: C [O]
Notes:
Type O negative blood group is considered as the universal blood type. People with type O blood group are called universal donors because type O negative blood is compatible to any blood recipient’s type.
15. Which of the following clearly defines the meaning of Plankton? (UPSC Prelims 1982)
[A] A kind of fish
[B] A submerged platform in waters
[C] Drifting of organisms in a body of water
[D] A kind of animal living under water
Show Answer
Correct Answer: C [Drifting of organisms in a body of water]
Notes:
Planktons are very small plants and animals that float on the surface of the sea and on which other sea animals feed.
16. Which of the following is the name given to the complete conversion of glucose In the presence of oxygen into carbon dioxide and water with release of energy? (UPSC Prelims 1998)
[A] aerobic respiration
[B] anaerobic respiration
[C] glycolysis
[D] hydrolysis
Show Answer
Correct Answer: A [aerobic respiration]
Notes:
In the cell, the food (glucose) is broken down into carbon dioxide and water using oxygen. When breakdown of glucose occurs with the use of oxygen it is called aerobic respiration. With the formula: (C6H12O6) + 6O2 = (6CO2) + 6H2O + E.
17. Which one among the following is not a good source of nutritional calcium? (UPSC Prelims 2006)
[A] Rice
[B] Ragi
[C] Skimmed milk
[D] Egg
Show Answer
Correct Answer: B [Ragi]
Notes:
Ragi contains only 344 mg of calcium and in 100 gm of ragi protein is 7.3 gm., fat 1.3 gm, fibre 3.6 gms, carbohydrates 72 gms, moisture 13.1 gm.
18. Which pigment is responsible for the colour of healthy skin in human beings?
[A] Bilirubin
[B] Haemoglobin
[C] Melanin
[D] Progesterone
Show Answer
Correct Answer: C [Melanin]
Notes:
The single most factor responsible for the cpolour of the skin is the pigment melanin. It is secreted by the melanocytes within the skin.
19. Which among the following genus is known as the ‘handy man’?
[A] Homo sapiens sapiens
[B] Homo habilis
[C] Homo sapiens neanderthelensis
[D] Homo erectus
Show Answer
Correct Answer: B [Homo habilis]
Notes:
Homo habilis– He had a face similar to his ancestors. The skull and brain size indicate that he may have been able to speak. The earliest tools made were from this era. Homo habilis is known as the ‘handy man’ because he was the first to make and use tools.
20. Trichology is related to which of the following statement?
[A] Study of nutrition
[B] Study of skin and stuffing
[C] Study of bony joints and ligaments
[D] Study of hair
Show Answer
Correct Answer: D [Study of hair]
Notes:
Trichology is the science of the structure, function and diseases of human hair.
