1. The web of the spider is made up of which among the following?
[A] Carbohydrate Polymers
[B] Proteins
[C] Lipids
[D] Polysaccharides
Show Answer
Correct Answer: B [Proteins]
Notes:
Spiders use their silk to make web. Spider silk is made out of protein.
2. Consider the following statements about B group Vitamins:
- Most of them are organic acids
- Most of them are water soluble
- Most of them are synthesized in the body
Which of the above statements is / are correct?
[A] Only 1 and 3
[B] Only 2
[C] Only 1 & 2
[D] 1, 2 & 3
Show Answer
Correct Answer: B [Only 2]
Notes:
B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism. This is the correct statement as most of the B Vitamins are water-soluble. They are not primarily organic acids nor are they mostly synthesized in the body. They’re found in highest abundance in meat, and dietary supplements containing all eight are referred to as a vitamin B complex, which indicates that they’re more often ingested rather than synthesized.
3. Skin works as a respiratory organ in which of the following Animals ?
[A] Cockroach
[B] Frog
[C] Whale
[D] Dog Fish
Show Answer
Correct Answer: B [Frog]
Notes:
Skin works as a respiratory organ in frog. The frog has three respiratory surfaces on its body which it uses to exchange gas with its surroundings: the skin, in the lungs and on the lining of the mouth.
4. Which among the following disease is called by Yersinia pestis?
[A] Leprosy
[B] Anthrax
[C] Plague
[D] Dengue
Show Answer
Correct Answer: C [Plague]
Notes:
Plague is an infectious disease caused by Yersinia pestis bacteria. It is usually found in small mammals and their fleas. The disease is transmitted between animals via their fleas. As it is a zoonotic bacterium, it can also transmit from animals to humans.
5. Which component in light causes suppression of melatonin produced by the pineal gland?
[A] Red
[B] Blue
[C] Green
[D] Indigo
Show Answer
Correct Answer: B [Blue]
Notes:
Blue component in light causes suppression of melatonin produced by the pineal gland. Melatonin regulates the sleep–wake cycle. Natural levels of melatonin in the blood are highest at night.
6. Which among the following is not a function of Sympathetic nerves in Autonomic nervous system?
[A] Enhancing the heart beats
[B] constricting the blood vessels
[C] dilate pupils
[D] contract urinary bladder
Show Answer
Correct Answer: D [contract urinary bladder]
Notes:
contract urinary bladder is a function of Parasympathetic nerves. Sympathetic nerves relax urinary bladder.
7. Which among the following correctly refers to Ischemia?
[A] restriction in blood supply due to factors in the blood vessels
[B] Abrupt fall in the blood Pressure
[C] necrosis in a blood vessel due to a local lack of oxygen
[D] condition of severely deficient supply of oxygen to the body
Show Answer
Correct Answer: A [restriction in blood supply due to factors in the blood vessels]
Notes:
Restriction in blood supply due to factors in the blood vessels refers to Ischemia. Ischemia can have causes that aren’t due to underlying disease some of which include extreme exercise, cold exposure or tourniquet.
8. Pearls are primarily composed of which of the following substances?
[A] Protein
[B] Calcium Carbonate
[C] Silica
[D] Sodium Carbonate
Show Answer
Correct Answer: B [Calcium Carbonate]
Notes:
Pearls are composed primarily of calcium carbonate, which is what gives them their unique luster. They are formed within the shell of certain mollusks as a defense mechanism against a potentially threatening irritant, such as a parasite. Over time, the mollusk continually deposits layers of calcium carbonate, which eventually forms a smooth, hard pearl. This process can take up to eight years.
9. With reference to classification of the flora and fauna, the meaning of term “Taxon” is __?
[A] A group of same species
[B] A group of organisms with same chromosome number
[C] A group of category of organisms
[D] A group of same genera
Show Answer
Correct Answer: C [ A group of category of organisms]
Notes:
In biology, a taxon (plural taxa; back-formation from taxonomy) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit.
10. Who among the following proposed the adage “Survival of the fittest”?
[A] Darwin
[B] Lamarck
[C] William
[D] Huxley
Show Answer
Correct Answer: A [Darwin]
Notes:
“Survival of the fittest” is a phrase that originated from Darwinian evolutionary theory as a way of describing the mechanism of natural selection. The biological concept of fitness is defined as reproductive success.
