1. Which part of the Central Nervous System controls “reflex Actions” ?
[A] Mesencephalon
[B] Rhombencephalon
[C] Medulla oblongata
[D] Spinal Chord
Show Answer
Correct Answer: D [Spinal Chord]
Notes:
The nervous system is made of two parts viz. Central Nervous System (CNS) and the Peripheral Nervous System (PNS). CNS is made of Brain [cerebrum, brainstem and cerebellum] and spinal cord. The PNS is made of nerves and neural ganglia. Further, the meninges (three membranes that envelop the brain and spinal cord) are also a part of the nervous system
2. Which among the following organs open in small intestine through Pylorus?
[A] Stomach
[B] Liver
[C] Pancreas
[D] All the above
Show Answer
Correct Answer: A [Stomach]
Notes:
The pylorus is the furthest part of the stomach that connects to the duodenum. It is divided into two parts, the antrum and the pyloric canal. The antrum connects to the body of the stomach, and the pyloric canal connects to the duodenum.
3. The elements which are found in Haemoglobin, Chlorophyll, Chalcopyrite & Vitamin B12 are respectively as follows__________?
[A] Iron, Copper, Magnesium, Cobalt
[B] Iron, Magnesium, Copper, Cobalt
[C] Iron, Cobalt, Copper, Magnesium
[D] Magnesium, Iron, Cobalt, Copper
Show Answer
Correct Answer: B [Iron, Magnesium, Copper, Cobalt]
Notes:
The elements which are found in Haemoglobin, Chlorophyll, Chalcopyrite & Vitamin B12 are respectively as follows: Iron, Magnesium, Copper, Cobalt.
4. In which of the following insects, a pigment called luciferin is found?
[A] Housefly
[B] Firefly
[C] Sandfly
[D] Fruitfly
Show Answer
Correct Answer: B [Firefly]
Notes:
A pigment called luciferin is found in firefly. Luciferin is a light-emitting compound which is found in organisms that generate bioluminescence. Luciferins typically undergo an enzyme-catalyzed reaction with molecular oxygen.
5. Meg-1 is an imprinted gene which finds expression only from maternal chromosomes which regulates the transfer of nutrients from the plant to the seed. This gene has been discovered in :
[A] Maize
[B] cotton
[C] jute
[D] Sugarcane
Show Answer
Correct Answer: A [Maize]
Notes:
Meg-1 gene was developed in Maize. It is an imprinted gene which finds expression only from maternal chromosomes which regulates the transfer of nutrients from the plant to the seed.
6. Which plant’s roots yield valuable medicinal alkaloids?
[A] Emblica officinalis
[B] Asparagus officinalis
[C] Helianthus annuus
[D] Rauwolfia serpentina
Show Answer
Correct Answer: D [Rauwolfia serpentina]
Notes:
Rauwolfia serpentina, also called Sarpagandha, yields reserpine, an antihypertensive alkaloid. Its roots have significant medicinal use in treating hypertension and mental disorders. The other species—Amla, Shatavari, and Sunflower—are not known for similar alkaloid content in their roots.
7. Which among the following species is a tapeworm?
[A] Schistosoma
[B] Taenia
[C] Fasciola
[D] Enterobius
Show Answer
Correct Answer: B [Taenia]
Notes:
Taenia is a taxonomic rank of tapeworm (helminth) that includes some main parasites of livestock. There are more than 100 species of Taenia. Taenia is responsible for taeniasis and cysticercosis in humans. They are morphologically characterized by a ribbon like body composed of a series of segments called proglottids.
8. Snakes, turtle, lizards and crocodiles falls under which category of animals?
[A] Amphibian
[B] Pisces
[C] Reptiles
[D] Aves
Show Answer
Correct Answer: C [Reptiles]
Notes:
Reptiles are tetrapod animals in the class Reptilia, comprising today’s turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology
9. Which of the following clearly defines Chlorophyll? (UPSC Prelims 1982)
[A] Halogen acid
[B] A green pigment found in the plants
[C] A chloro-organic compound
[D] Element
Show Answer
Correct Answer: B [A green pigment found in the plants]
Notes:
Chlorophyll is a green photosynthetic pigment found in plants, algae, and cyanobacteria. Chlorophyll absorbs mostly in the blue and to a lesser extent red portions of the electromagnetic spectrum, hence its intense green color.
10. Consider the following effects of genetic engineering:
- Disease resistance
- Growth promotion
- Closing
- Longevity
Of these effects, those that have be entried out with a certain amount of success include (UPSC Prelims 1990)
[A] 1, 3 and 4
[B] 2, 3 and 4
[C] 1, 2 and 4
[D] 1, 2 and 3
Show Answer
Correct Answer: D [1, 2 and 3]
Notes:
Genetic engineering can have effects on many things but till now the scientists have not found any way to increase longevity by genetic engineering.
