11. Which of the following microorganisms causes Ring worm? (UPSC Prelims 1990)
[A] Bacterium
[B] Fungus
[C] Virus
[D] Worm
Show Answer
Correct Answer: B [Fungus]
Notes:
Ringworm isn’t a worm. It’s a skin infection that’s caused by moldlike fungi that live on the dead tissues of your skin, hair, and nails. It can occur at any place and on your scalp. When one gets it between the toes, it’s what people call athlete’s foot.
12. When compared to the mammals, birds are less sensitive to temporary deprivation of water, because? (UPSC Prelims 1990)
[A] The water requirement per unit weight is less in birds than in mammals.
[B] Absorption of water from the gut is more efficient in birds than in mammals.
[C] Urea excretion in mammals entails a greater loss of water than that in birds.
[D] None of these
Show Answer
Correct Answer: A [The water requirement per unit weight is less in birds than in mammals.]
Notes:
When compared to the mammals, birds are less sensitive to temporary deprivation of water, because the water requirement per unit weight is less in birds than in mammals.
13. Which of the following branch of biology deals with the study of Cartilage?
[A] Chondrology
[B] Chromatology
[C] Cnidology
[D] Conchology
Show Answer
Correct Answer: A [Chondrology]
Notes:
Chondrology is the branch of anatomy that deals with cartilage.
14. Which of the following vitamins was crystallized by Harry Holmes and Ruth Corbet?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin E
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Harry Holmes and Ruth Corbet isolated and crystallized vitamin A in 1937. Vitamin A is important for normal vision, the immune system, and reproduction.
15. Leslie Orgel was known for discovering which of the following?
[A] life was based on RNA
[B] life was based on protien
[C] life was based on DNA
[D] None of these
Show Answer
Correct Answer: A [life was based on RNA]
Notes:
In the late 1960s, Orgel proposed that life was based on RNA before being based on DNA or proteins. His theory included genes based on RNA and RNA enzymes.
16. What is an enzyme?
[A] Acid
[B] Base
[C] Salt
[D] Catalyst
Show Answer
Correct Answer: D [Catalyst]
Notes:
Enzyme is a protein. It acts as a catalyst in living organisms, and controls the rate of chemical reactions inside the body.
17. What is Rancidity?
[A] Deterioration of Fat
[B] Deterioration of Glucose
[C] Deterioration of Protein
[D] Deterioration of Vitamins
Show Answer
Correct Answer: A [Deterioration of Fat]
Notes:
The process of oxidation of oily and Fatty food, which changes its taste and smell is known as Rancidity. Rancidity generally occurs in Fat.
18. Who among the following is considered as the “Father of Indian Phycology”
[A] Prof. M.O.P. Iyenger
[B] Prof. J.N. Mishra
[C] Prof. R.R. Mishra
[D] Prof. R.N. Singh
Show Answer
Correct Answer: A [Prof. M.O.P. Iyenger]
Notes:
MOP Iyengar from Madras is considered the father of Indian Phycology. He discovered Fritschiella heterotrichus terrestrial algae.
19. Which of the following is not an auxiliary pigment?
[A] Chlorophyll ‘a’
[B] Chlorophyll ‘e’
[C] Phycocyanin
[D] Xanthophyll
Show Answer
Correct Answer: A [Chlorophyll ‘a’]
Notes:
Chlorophyll ‘a’ is an essential pigment, it is not helpful.
20. The sporophytic generation is represented only by the zygote__?
[A] Funaria
[B] Chlamydomonas
[C] Pinus
[D] Pinus
Show Answer
Correct Answer: B [Chlamydomonas]
Notes:
Important Features of Chlamydomonas: The plant body is unicellular, pear-shaped, and biflagellate, Each cell typically contains a cup-shaped chloroplast, an eye sac, and two contractile vacuoles, Pamela-stage appearance, Asexual reproduction occurs through biflagellate zoospore formation.
