11. Where does the Fat stored in human body? (UPSC Prelims 1983)
[A] Muscular tissue
[B] Connective tissue
[C] Adipose tissue
[D] Epithelial tissue
Show Answer
Correct Answer: C [Adipose tissue]
Notes:
Adipose tissue is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.
12. Which of the following diseases is hereditary? (UPSC Prelims 1987)
[A] Haemophilia
[B] Tuberculosis
[C] Cancer
[D] Dysentery
Show Answer
Correct Answer: A [Haemophilia]
Notes:
Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
13. Who among the following carries the Haemophilia, a hereditary disease? (UPSC Prelims 1993)
[A] females and expressed by females
[B] females and expressed by males
[C] males and expressed by females
[D] males and expressed by males
Show Answer
Correct Answer: B [females and expressed by males]
Notes:
If he inherits his mother’s other X chromosome, he will have normal blood clotting. So a carrier’s son has a 50% chance of having hemophilia. A baby girl will inherit an X chromosome with a dominant gene for normal blood clotting from her father. So the daughter will not have hemophilia.
14. Who was awarded Nobel Prize for deciphering the language of bees? (UPSC Prelims 1995)
[A] H.G. Khurana
[B] K.V. Frisch
[C] Julian Huxley
[D] Dorothy Hodgkins
Show Answer
Correct Answer: B [K.V. Frisch]
Notes:
K.V. Frisch shared the 1973 Nobel Prize in physiology or medicine with K. Lorenz and N. Tinbergen for his pioneering work in ethology. He deciphered the ‘language’ of bees by studying their dance patterns in which one bee tells others in the hive the direction and distance of a food source.
15. Which of the following arteries supplies blood to the heart? (UPSC Prelims 1997)
[A] Carotid arteries
[B] Hepatic arteries
[C] Coronary arteries
[D] Pulmonary arteries
Show Answer
Correct Answer: C [Coronary arteries]
Notes:
The aorta (the main blood supplier to the body) branches off into two main coronary blood vessels (also called arteries). These coronary arteries branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle. The right coronary artery supplies blood to the right side of the heart.
16. Which of the following is the name given to the cellular and molecular control of programmed cell death? (UPSC Prelims 2001)
[A] Apoptosis
[B] Ageing
[C] Degeneration
[D] Necrosis
Show Answer
Correct Answer: A [Apoptosis]
Notes:
• Apoptosis is the process of programmed cell death in multicellular organisms. Apoptosis occurs during normal cell turnover, development and in immune system.
• Ageing is the accumulation of changes.
• Degeneration is the deterioration of a tissue or an organ in which its function is diminished or its structure impaired.
• Necrosis is the disorganized break down of flesh in some part of the body of multicellular organism.
17. To which of the following kingdoms does the yeast belong to?
[A] Bacteria
[B] Virus
[C] Fungus
[D] None of the above.
Show Answer
Correct Answer: C [Fungus]
Notes:
Yeast is an unicellular eukaryotic micro organism belonging to the family of fungus.
18. Which branch of biology is known for the study of tissues on artificial mediums?
[A] Pisciculture
[B] Silviculture
[C] Tissue Culture
[D] Horticulture
Show Answer
Correct Answer: C [Tissue Culture]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium isolated from the parent organism. This technique is also called micropropagation.
19. Which of the following is not a part of the sexual cycle of fungi?
[A] Meiosis
[B] Karyogamy
[C] Mitosis
[D] Plasmogamy
Show Answer
Correct Answer: C [Mitosis]
Notes:
Mitosis is a process where a single cell divides into two identical daughter cells.
20. Why don’t diatoms perish quickly?
[A] Because they are Chitinous
[B] because it has siliceous walls
[C] because Diatoms contain saline soil
[D] because their body is impervious to water
Show Answer
Correct Answer: B [because it has siliceous walls]
Notes:
Diatoms are unique among microorganisms in that they have rigid cell walls made of silica, called frustules. These frustules are intricately patterned and provide protection to the diatom cell. The silica frustules are durable and resist decomposition, which helps diatoms to maintain their structural integrity and avoid rapid decay.
