1. Clove is which part of the plant?
[A] Flower bud
[B] Calyx
[C] Inflorescence
[D] fruit
Show Answer
Correct Answer: A [Flower bud]
Notes:
Cloves are native to the Maluku Islands (or Moluccas) in Indonesia. They are the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum. They are generally used as a spice.
2. Down Syndrome is also known as:
[A] Edwards syndrome
[B] Patau syndrome
[C] Mongolism
[D] None of the above
Show Answer
Correct Answer: C [Mongolism]
Notes:
Down’s syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.Down’s syndrome is the most common chromosome abnormality in humans. It is typically associated with a delay in cognitive ability (mental retardation, or MR) and physical growth, and a particular set of facial characteristics
3. 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.
4. Meg-1 is an imprinted gene which finds expression only from maternal chromosomes which regulates the transfer of nutrients from the plant to the seed. This gene has been discovered in :
[A] Maize
[B] cotton
[C] jute
[D] Sugarcane
Show Answer
Correct Answer: A [Maize]
Notes:
Meg-1 gene was developed in Maize. It is an imprinted gene which finds expression only from maternal chromosomes which regulates the transfer of nutrients from the plant to the seed.
5. In human body, the largest amount of the carbon dioxide produced by body cells is carried to the lungs as__:
[A] CO2 attached to haemoglobin in the red blood cells
[B] The bicarbonate ion attached to haemoglobin
[C] CO2 gas in solution in the plasma
[D] Bicarbonate ion dissolved in the plasma
Show Answer
Correct Answer: D [ Bicarbonate ion dissolved in the plasma]
Notes:
Although a small amount of CO2 is carried by the red blood cells, most is carried as the bicarbonate ion in plasma. Carbon dioxide can travel in the bloodstream in many forms. It can mix with water and form carbonic acid. It can also attach to hemoglobin in red blood cells.
6. ‘Dendrochronology’ is the study of the age of which of the following?
[A] Woody Plants
[B] Shrubs
[C] Fungi
[D] All of the above
Show Answer
Correct Answer: A [Woody Plants]
Notes:
Dendrochronology is the branch of biology which studies and estimates the age of woody plants.
7. Where does the Fat stored in human body?
[A] Muscular tissue
[B] Connective tissue
[C] Adipose tissue
[D] Epithelial tissue
Show Answer
Correct Answer: C [Adipose tissue]
Notes:
Adipose tissue is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.
8. Which one of the following diseases is caused due to defective genes?
[A] Ulcer
[B] Haemophilia
[C] Diabetes
[D] Cancer
Show Answer
Correct Answer: B [Haemophilia]
Notes:
Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
9. In the context of the organic evolution, the loss of limbs of snakes is explained by which of the following phenomenon?
[A] Use and disuse of organs
[B] adaptation to living in burrows
[C] natural selection
[D] inheritance of acquired characters
Show Answer
Correct Answer: A [Use and disuse of organs]
Notes:
In organic evolution, Lamarck believed that any particular part of the body that is put into more frequent use has tendency to develop stronger and better while that part of body which is put into less or no use has tendency to gradually disappear. So, loss of limbs in snake is an example of use and disuse of organs.
10. Which one of the following is monogamous?
[A] Wolf
[B] Walrus
[C] Seal
[D] Deer
Show Answer
Correct Answer: A [Wolf]
Notes:
Wolf alpha pairs are usually monogamous with each other, but alpha males have been known to stray with other pack members, especially if they are closely related. Among red foxes, long considered extremely loyal, mate switching has also been shown.
