11. In humans, the sound is produced by the which of the following?
[A] epiglottis
[B] oesophagus
[C] larynx
[D] medulla
Show Answer
Correct Answer: C [larynx]
Notes:
The larynx is another name for the voice box. It’s a tube about 2 inches (5cm) long in adults. It sits above the windpipe (trachea) in the neck and in front of the food pipe.
12. Which of the following belongs to the Hypochondria? (UPSC Prelims 1983)
[A] Disease of eyes
[B] Disease of sexual organs
[C] Disease of low blood pressure
[D] State of morbid anxiety about one’s own health, with complaint of imaginary disorders
Show Answer
Correct Answer: D [State of morbid anxiety about one’s own health, with complaint of imaginary disorders]
Notes:
Hypochondria symptoms include a long-term and intense fear of having a serious condition and worry that minor symptoms indicate something serious. A person may frequently visit or switch doctors.
13. 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.
14. The introduction of Pre-natal Diagnostic Techniques Bill in Parliament was prompted by the increasing incidence of? (UPSC Prelims 1992)
[A] Female foeticide
[B] Failure of contraceptive devices
[C] Spurious drugs being used for prenatal immunisation
[D] Unqualified persons diagnosing pregnancy in villages by primitive methods
Show Answer
Correct Answer: A [Female foeticide]
Notes:
The introduction of Pre-natal Diagnostic Techniques Bill in Parliament was prompted by the increasing incidence of Female foeticide. Female feticide is the abortion of a female foetus outside of legal methods. The frequency of female foeticide in India is increasing day by day. The natural sex ratio is assumed to be between 103 and 107, and any number above it is considered as suggestive of female foeticide.
15. 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.
16. What is the average fat content of buffalo milk? (UPSC Prelims 1997)
[A] 7.2%
[B] 4.5%
[C] 9.0%
[D] 10.0%
Show Answer
Correct Answer: A [7.2%]
Notes:
Average fat content in buffalo milk is 7.2% and average fat content in cow milk is 4.4%. As per the nutrient components, buffalo milk contains all the nutrients in higher proportion than cow’s milk.
17. Neem tree has acquired industrial importance as a source of? (UPSC Prelims 1999)
[A] biopesticide and anti-fertility compound
[B] anti-fertility compound, biofertilizer and anti-cancer drug
[C] biofertilizer, biopesticide and anti- fertility compound
[D] anti-cancer drug, biopesticide and biofertilizer
Show Answer
Correct Answer: A [biopesticide and anti-fertility compound]
Notes:
Neem has been patented by India for its use as biofertilizer, biopesticide and antifertility compound as contraceptive. Neem is a natural herb that comes from the neem tree, other names for which include Azadirachta indica and Indian lilac. The extract comes from the seeds of the tree and has many different traditional uses. Neem is known for its pesticidal and insecticidal properties, but people also use it in hair and dental products.
18. Lepidopterology is a branch of biology, which deals with the studies of which of the following?
[A] Lipids and fats
[B] Butterflies and moths
[C] Tongue
[D] Lakes and Ponds
Show Answer
Correct Answer: B [Butterflies and moths]
Notes:
Lepidopterology is a branch of entomology that deals with the scientific study of moths and three superfamilies of butterflies.
19. Protein is made up of which of the following?
[A] Sugar
[B] Amino acid
[C] Carbohydrate
[D] Fatty acid
Show Answer
Correct Answer: B [Amino acid
]
Notes:
All proteins are linked by a peptide link and are polymers of amino acids. Amino acid is the building block of protein.
20. Which of the following may be most likely to be missing from a gram-positive bacterium?
[A] Penicillin-binding protein
[B] Peptidoglycan
[C] Lipopolysaccharide
[D] Phospholipid bilayer membrane
Show Answer
Correct Answer: C [Lipopolysaccharide]
Notes:
Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall. It itself is surrounded by an outer membrane containing lipopolysaccharides.
