1. “Minimata Disease ” is a severe neurological syndrome caused by eating fish and discovered in Japan. What was factor behind this disease?
[A] Arsenic Poisoning
[B] Mercury Poisoning
[C] Lead Poisoning
[D] Cadmium Poisoning
Show Answer
Correct Answer: B [Mercury Poisoning]
Notes:
Minamata disease, sometimes referred to as Chisso-Minamata disease, is a neurological syndrome which is caused by severe mercury poisoning. Some of the symptoms of the disease are numbness in the hands and feet, ataxia, general muscle weakness, etc.
2. The hard part of a stem of a plant is because of ________?
[A] Sclerenchyma
[B] Xylem
[C] Pholem
[D] Stomata
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Correct Answer: B [Xylem]
Notes:
The hard part of a stem of a plant is because of Xylem. Stem supports leaves, flowers and fruits. It also transports fluids between the roots and the shoots in the xylem and phloem, stores nutrients, and produces new living tissue.
3. Which among the following is not a monosaccharide?
[A] Glucose
[B] Sucrose
[C] Fructose
[D] Galactose
Show Answer
Correct Answer: B [Sucrose]
Notes:
Monosaccharides are simple carbohydrates molecules that cannot be broken down into smaller molecules of other carbohydrates. Glucose and fructose are examples of Monosaccharides.
4. Which among the following virus is also called as “Hit & Hide” Virus?
[A] RSV Virus (respiratory syncytial virus )
[B] Dengue virus
[C] Influenza virus
[D] HIV virus
Show Answer
Correct Answer: A [RSV Virus (respiratory syncytial virus )]
Notes:
RSV Virus (respiratory syncytial virus) is also called as “Hit & Hide” virus. It causes infections of the lungs and respiratory tract. It is a major cause of lower respiratory tract infections.
5. Japanese encephalitis is a disease caused by __ ?
[A] Virus
[B] Protozoa
[C] Bacteria
[D] Fungi
Show Answer
Correct Answer: A [Virus]
Notes:
Japanese encephalitis is caused by virus from the family Flaviviridae. It’s a Mosquito Borne Disease
6. Biologists have been able to demonstrate the hearing and sound sensory mechanism through the acoustico-lateralis system in which of the following vertebrates ?
[A] amphibians
[B] snakes
[C] fishes
[D] Birds
Show Answer
Correct Answer: C [fishes]
Notes:
Biologists have been able to demonstrate the hearing and sound sensory mechanism through the acoustico-lateralis system in fishes.
7. With reference to classification of the animals, which among the following groups represents Elasmobranchs?
[A] Shark, Skates and Rays
[B] Shark, Rays and Dolphins
[C] Shark, Skates and Dolphins
[D] Skates, Dolphins and Rays
Show Answer
Correct Answer: A [ Shark, Skates and Rays]
Notes:
The term Elasmobranches is a collective name for the sharks, skates and rays. Elasmobranches have a skeleton made of cartilage, no swim bladders and rough skin made up of small dermal dentils. Elasmobranches are renowned for their highly tuned senses.
8. Which of the following cells is present in epidermis that surrounds stomatal pore in plants?
[A] Epithelial cells
[B] Guard cells
[C] Subsidiary cells
[D] Accessory cells
Show Answer
Correct Answer: B [ Guard cells ]
Notes:
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore.
9. Where does pearls are formed? (UPSC Prelims 1982)
[A] Inside squids
[B] Inside snails
[C] Inside oysters
[D] Inside mollusks
Show Answer
Correct Answer: C [Inside oysters]
Notes:
Natural Pearls are formed when an irritant usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called nacre, is deposited until a lustrous pearl is formed.
10. The saliva helps in the digestion of which of the following materials? (UPSC Prelims 1988)
[A] Starch
[B] Proteins
[C] Fibers
[D] Fats
Show Answer
Correct Answer: A [Starch]
Notes:
The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach.