1. The terms Hypoglycemia and Hyperglycemia are related to which among the following?
[A] Body Fat
[B] Blood Sugar
[C] Metabolism of sugar galactose
[D] Respiration
Show Answer
Correct Answer: B [Blood Sugar]
Notes:
Hypoglycemia: low blood sugar
Hyperglycemia: High blood sugar
2. Which among the following is correct about biocenosis?
[A] The study of energy transformations in the living systems
[B] Community of organisms occupying an area
[C] Study of the parts of an ecosystem with specific species
[D] A kind of abnormality related to organism living in a particular habitat
Show Answer
Correct Answer: B [Community of organisms occupying an area]
Notes:
The term Biocenosis was coined by Karl Mobius in 1877. It describes the interacting organisms which are living together in a habitat or biotope. The use of this term has declined in the 21st Century.
3. A treatment with which among the following plant hormones would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability?
[A] Ethylene
[B] Abscisic Acid
[C] Gibberelic Acid
[D] Auxin
Show Answer
Correct Answer: B [Abscisic Acid]
Notes:
A treatment with abscisic acid would prevent water loss from the plant leaves, by reducing transpiration, in times of low water availability.
4. Which of the following is responsible for exchange of carbon dioxide for oxygen in the lungs?
[A] Alveoli
[B] Pharynx
[C] Tendons
[D] Duodenum
Show Answer
Correct Answer: A [ Alveoli ]
Notes:
Alveoli are tiny sacs in our lungs. The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs.
5. Which among the following is homologous to a human arm?
[A] Wing of an insect
[B] Leg of a lobster
[C] Lateral Fin of a whale
[D] Front leg of a reptile
Show Answer
Correct Answer: C [ Lateral Fin of a whale]
Notes:
The lateral fin of the whale consists of the same bones as a human’s arm, the radius, ulna, and humerus. These structures are considered to be homologous because the underlying structure is similar and, therefore, humans and whales share a common ancestor. The lobster’s leg, the reptile’s front leg, and the insect’s wing are analogous to the human’s arm. They have a common function but no common structure, and they do not share a common ancestor.
6. Triticale is a hybrid of which two crops?
[A] Wheat and Rice
[B] Wheat and Rye
[C] Rice and Rye
[D] Rice and Sorghum
Show Answer
Correct Answer: B [Wheat and Rye]
Notes:
Triticale is the world’s first man-made cereal developed by crossing wheat (Triticum) and rye (Secale) to combine wheat’s yield and grain quality with rye’s disease resistance and environmental tolerance. The name “triticale” merges “Triticum” and “Secale”, its parent genera.
7. Which of the following is the largest gland in human body?
[A] Thyroid
[B] Kidney
[C] Liver
[D] Pancreas
Show Answer
Correct Answer: C [Liver]
Notes:
Liver is both the heaviest internal organ and the largest gland in the human body. Located in the right upper quadrant of the abdominal cavity, it rests just below the diaphragm, to the right of the stomach and overlies the gallbladder.
8. It is possible to produce seedless tomato fruits by which of the following processes? (UPSC Prelims 1996)
[A] Applying trace elements in tomato fields
[B] spraying mineral solution on plants
[C] spraying hormones on flowers
[D] applying fertilizers containing radioactive elements
Show Answer
Correct Answer: C [spraying hormones on flowers]
Notes:
Seed and fruit development are intimately related processes controlled by internal signals and environmental cues. One method to produce seedless fruit is to develop plants able to produce fruits independently from pollination and fertilization of the ovules.
9. Which one of the following statements is correct? (UPSC Prelims 2002)
[A] Prions are the smallest free-living cells
[B] The cell wall of Mycoplasmas is made up of amino sugars
[C] Viroids consist of a single-stranded RNA molecule
[D] Rickettsias lack cell wall
Show Answer
Correct Answer: C [Viroids consist of a single-stranded RNA molecule]
Notes:
Viroids are the smallest infectious pathogens known. They are composed solely of a short strand of circular, single-stranded RNA that has no protein coating. All known viroids are inhabitants of higher plants, in which most cause diseases, ranging in economic importance.
10. Who is the father of Modern Botany?
[A] Carl Linnaeus
[B] Theophrastus
[C] Robert Hooke
[D] Krateuas
Show Answer
Correct Answer: A [Carl Linnaeus]
Notes:
Carl Linnaeus is known as the father of modern botany. Linnaeus first formulated the principles, known as binomial nomenclature, to create a uniform system for defining and naming natural species and species of organisms.
