1. Lac is the scarlet resinous secretion from ________?
[A] Herbs
[B] Trees
[C] Bark
[D] insects
Show Answer
Correct Answer: D [insects]
Notes:
Lac is the scarlet resinous secretion from insects. It is secreted by a number of a number of species of lac insects, of which the most commonly cultivated is Kerria lacca. The farmer gets a stick that contains eggs ready to hatch and ties it to the tree to be infested.
2. 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.
3. Which among the following plants is known as Indian ginseng?
[A] Withania somnifera
[B] Datura ceratocaula
[C] Iberis amara
[D] Capsella bursa pastoris
Show Answer
Correct Answer: A [Withania somnifera]
Notes:
Withania somnifera or commonly called as Ashwagandha is known as Indian ginseng.
4. Which among the following is a correct definition of Hematocrit?
[A] proportion of blood volume that is occupied by red blood cells
[B] proportion of blood volume that is occupied by white blood cells
[C] proportion of blood volume that is occupied by Leucocytes and Thromobocytes
[D] proportion of blood volume that is occupied by plasma
Show Answer
Correct Answer: A [proportion of blood volume that is occupied by red blood cells]
Notes:
Hematocrit levels are used in doping tests of Athletes , (the RBCs are carriers of Oxygen). hematocrit levels also denotes the blood iron. hematocrit levels of 38 or higher are normally suitable for the donors to donate their blood. Here please note that sometimes its is asked in exams about the ion which can help better in blood coagulation and normally options given are Ca, Na, K & Fe+3. The obvious answer is Fe+3.
5. Which among the following is essential gene material ?
[A] Protein
[B] Fat
[C] DNA
[D] RNA
Show Answer
Correct Answer: C [DNA]
Notes:
The correct answer is DNA. DNA (deoxyribonucleic acid) is the essential genetic material in most living organisms, encoding the instructions for development, functioning, growth, and reproduction. It is composed of nucleotides and forms a double helix structure. RNA (ribonucleic acid) plays a crucial role in protein synthesis and can also serve as genetic material in some viruses, but DNA is the primary carrier of genetic information in cells.
6. What is PRINT (Particle Replication in Non-wetting Templates) Technology ?
[A] It’s a technology related to genetic engineering and refers to duplication of the DNA codes
[B] It’s a technology related to climate change and refers to a new technique of combating air pollution
[C] It’s a new technology related to synthesis of artificial blood
[D] None of them
Show Answer
Correct Answer: C [It’s a new technology related to synthesis of artificial blood]
Notes:
PRINT (Particle Replication in Non-wetting Templates) Technology is a new technology related to synthesis of artificial blood. PRINT method has been widely applied onto material sciences, drug delivery, electronic devices, optics, etc.
7. Taxonomically, which among the following is closet to Sea Corals?
[A] Sea Lettuce
[B] Sea Horse
[C] Sea Anemone
[D] Sea Urchin
Show Answer
Correct Answer: C [ Sea Anemone]
Notes:
As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and Hydra.
8. Which among the following option would normally have the highest Biological Oxygen Demand (BOD)?
[A] A running river
[B] A running polluted river
[C] Untreated Municipal waste water
[D] Ocean water
Show Answer
Correct Answer: C [ Untreated Municipal waste water]
Notes:
BOD is amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period, for running rivers, it would be minimum and for Untreated Municipal waste water it would be maximum.
9. From the point of view of evolution of living organisms, which of the following set of animals is a correct sequence of evolution?
[A] Whale, Kangaroo, Echidna
[B] Echidna, Whale, Kangaroo
[C] Kangaroo, Whale, Echidna
[D] Echidna, Kangaroo, Whale
Show Answer
Correct Answer: D [ Echidna, Kangaroo, Whale]
Notes:
The correct sequence of the evolution would be Monotremes, Marsupials and Eutheria. Since, Whale is in subclass Eutheria, it is the latest in the evolution. So the correct sequence is Echidena (Monotreme), Kangaroo (Marsupials) & Whale (Eutheria).Echidna are the only surviving members of the Monotremata order and are the only living mammals that lay eggs.
10. Which of the following plants is most likely to present a higher water use efficiency?
[A] Wheat
[B] Rice
[C] Sorghum
[D] Pea
Show Answer
Correct Answer: C [Sorghum]
Notes:
Sorghum is considered to have greater water use efficiency primarily because it is a C4 plant. C4 plants have a unique mechanism to concentrate carbon dioxide levels in their leaves, which in turn drastically improves efficiency in the use of water and nitrogen. Sorghum, with this C4 photosynthesis, is highly tolerant to drought, intense sunlight, and high temperatures.
