1. Flowering in long day plants is related to which of the following?
[A] Auxin
[B] Gibberlin
[C] Cytokinin
[D] Ethylene
Show Answer
Correct Answer: B [Gibberlin]
Notes:
Flowering in long day plants is related to Gibberlin. Long-day plants usually flower when the night length falls below their critical photoperiod. Many of our summer blooming flowers and garden vegetables are long day plants.
2. What would happen if red blood cells were placed in distilled water?
[A] They would shrink and collapse
[B] They would stick together
[C] They would increase in volume and burst
[D] They would remain the same
Show Answer
Correct Answer: C [They would increase in volume and burst]
Notes:
When red blood cells are placed in distilled water, the water molecules move into the cells by osmosis because the cells have a higher solute concentration than the distilled water. This influx of water causes the red blood cells to swell and eventually burst in a process known as hemolysis. This demonstrates how osmosis, a vital biological process, can result in cell damage when the external conditions are not balanced.
3. Which part of the plant Raphanus sativus is edible?
[A] Fruit
[B] Leaves
[C] Roots
[D] All the above
Show Answer
Correct Answer: D [All the above]
Notes:
Raphanus sativus is Radish. The Edible parts are roots, but Radish leaves and seedpods which are fruits are also edible.
4. Which among the following was the first vaccine ever to be developed?
[A] Cholera
[B] Smallpox
[C] Rabies
[D] Tetanus
Show Answer
Correct Answer: B [Smallpox]
Notes:
Smallpox vaccine was the first vaccine ever to be developed. Smallpox is an infectious disease which is caused by one of two virus variants, Variola major and Variola minor.
5. Which of the following artificial sweeteners is not broken down by the body and therefore it is non-caloric (no-calorie sweetener)?
[A] Aspartame
[B] Saccharin
[C] Sucralose
[D] Cyclamate
Show Answer
Correct Answer: C [Sucralose]
Notes:
Sucralose is an artificial sweetener. The majority of ingested sucralose is not broken down by the body and therefore it is non-caloric. Sucralose is approximately 600 times as sweet as sucrose (table sugar), twice as sweet as saccharin, and 3 times as sweet as aspartame. It is stable under heat and over a broad range of pH conditions. Therefore, it can be used in baking or in products that require a longer shelf life. The commercial success of sucralose-based products stems from its favorable comparison to other low-calorie sweeteners in terms of taste, stability, and safety. It is used because it is a no-calorie sweetener, and does not promote dental cavities, is safe for consumption by diabetics, and does not affect insulin levels.
6. Taxonomically, tomato and potato belong to same __:
[A] Family
[B] Genus
[C] Species
[D] Order
Show Answer
Correct Answer: A [Family]
Notes:
Potato (Solanum tuberosum) and tomato (Lycopersicum esculentum) both belong to family Solanaceae, which is commonly called as the “potato family”. Many plants belonging to this family are sources of vegetables, fruits etc.
7. Aves have evolved from which of the following?
[A] Amphibians
[B] Arthropods
[C] Mammals
[D] Reptiles
Show Answer
Correct Answer: D [Reptiles]
Notes:
Birds evolved from theropod dinosaurs during the Jurassic around 165–150 million years ago. Birds aren’t just closely related to dinosaurs, they really are dinosaurs! This is what most people mean when they say that birds are reptiles, although technically according to the phylogenetic system mammals are also reptiles.
8. Which blood group is universal acceptor?
[A] O+
[B] AB+
[C] AB-
[D] O-
Show Answer
Correct Answer: B [AB+]
Notes:
AB +ve is the universal acceptor blood group or the universal receptors. Because AB+ individuals have all of the possible antigens and therefore are the universal acceptors as their immune system is used to seeing each of the antigens.
9. Which of the following disease is non-communicable in nature?
[A] Tuberculosis
[B] Chicken-pox
[C] Cholera
[D] Cancer
Show Answer
Correct Answer: D [Cancer]
Notes:
A noncommunicable disease (NCD) is a medical condition or disease that is by definition non-infectious and non-transmissible among people. Eg. Cancer which is also called malignancy, is an abnormal growth of cells.
10. The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by?
[A] a decrease in the supply of oxygen
[B] minor wear and tear of muscle fibres
[C] the depletion of glucose
[D] the accumulation of lactic acid
Show Answer
Correct Answer: D [the accumulation of lactic acid]
Notes:
The sensation of fatigue which the muscles feel after a prolonged and a strenuous physical workout is caused by the accumulation of lactic acid.
This is so because lactic acid buildup tends to cause fatigue and soreness in the muscles.
There is a burning sensation felt up in the muscles when buildup of acid happens in muscles during exercise. This is also known as acidosis.