1. Which among the following is not present in pure sugar ?
[A] Carbon
[B] Hydrogen
[C] Nitrogen
[D] Oxygen
Show Answer
Correct Answer: C [Nitrogen]
Notes:
Pure Sugar is sucrose C12H22O11.
2. From which part of the Glycyrrhiza glabra plant, also known as Liquorice or Mulethi, is the extract derived?
[A] Leaves
[B] Roots
[C] Fruits
[D] Stem
Show Answer
Correct Answer: B [Roots]
Notes:
Liquorice root, or Mulethi, is a potent expectorant that has been utilized in Ayurvedic medicine since ancient times. The powdered root is used in “Jastimadhu” tooth powder. Many cough syrups incorporate Liquorice as one of their components. It is also used to treat mouth and peptic ulcers, attesting to its versatile medicinal properties. Liquorice root is well-regarded for its numerous health benefits apart from its sweet flavour.
3. Which of the following plants have respiratory roots?
[A] Marshy Plants
[B] Mangroves
[C] Epiphytes
[D] Submerged Hydrophytes
Show Answer
Correct Answer: B [Mangroves]
Notes:
Respiratory roots are found in aquatic plants and plants which grow on marshy areas. In mangroves the roots are not getting sufficient oxygen and hence they grow upwards from the ground.
4. Which among the following is NOT a true bast fiber?
[A] Jute
[B] Hemp
[C] Flax
[D] Cotton
Show Answer
Correct Answer: D [Cotton]
Notes:
Please note that Bast Fibers are obtained from Phloem
5. “Pratham” the first animal born in 1990 by the IVF (In vitro Fertilization) at the National Dairy Research Institute, Karnal was a ________ ?
[A] Cow
[B] Buffalo
[C] Sheep
[D] Goat
Show Answer
Correct Answer: B [Buffalo]
Notes:
“Pratham” the first animal born in 1990 by the IVF (In vitro Fertilization) at the National Dairy Research Institute, Karnal was a buffalo.
6. The colonization of an area that has not been previously occupied by an ecological community is called:
[A] primary succession
[B] secondary succession
[C] tertiary succession
[D] cyclic succession
Show Answer
Correct Answer: A [ primary succession]
Notes:
The colonization of an area that has not been previously occupied by an ecological community is called primary succession. Examples are: newly exposed rock or sand surfaces, lava flows, newly exposed glacial tills, etc.
7. 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.
8. The study of Improvement of human race by improving environment is known as ?
[A] Euthenics
[B] Eugenics
[C] Euphenics
[D] Etiology
Show Answer
Correct Answer: A [Euthenics]
Notes:
Euthenics is the branch of biology that studies the improvement of human race by improving environment. Eugenics is the branch of biology that studies the Improvement of human race through laws of heredity. Euphenics is the branch of biology that studies the improvement of human race by drug treatment or genetic engineering. Etiology is the branch of biology that studies the Life cycle of causal organisms of the disease.
9. Which of the following is not a feature of organisms in the class Mammalia ?
[A] milk producing mammary glands
[B] cells with a membrane-bounded nucleus
[C] dorsal hollow nerve chord
[D] chitin in the cell membrane
Show Answer
Correct Answer: D [ chitin in the cell membrane ]
Notes:
Organisms in the class Mammalia all have milk producing mammary glands; cells with a membrane-bounded nucleus and a dorsal hollow nerve cord. Chitin in Cell Walls is the feature of Kingdom fungi.
10. Which of the following is responsible for giving colour to human skin?
[A] Haemoglobin
[B] Melanin
[C] Luciferin
[D] Flavonoids
Show Answer
Correct Answer: B [Melanin]
Notes:
Melanin is a pigment that gives human skin, hair, and eyes their color. Dark-skinned people have more melanin in their skin than light-skinned people have. Melanin is produced by cells called melanocytes.
