31. The bone around the nose contains hollow, air-filled chambers known as __
[A] Sinuses
[B] Turbinates
[C] Mucus Membrane
[D] Septum
Show Answer
Correct Answer: A [Sinuses]
Notes:
Sinuses are the bone around the nose that contains hollow, air-filled chambers. Mucus from the sinuses flows into the nasal cavity.
32. Which of the following organ is involved in the purification of Inhaled Air?
[A] Cartilage
[B] Hair or cilia
[C] Mucus Membrane
[D] Septum
Show Answer
Correct Answer: B [Hair or cilia]
Notes:
Hair or cilia is the organ of the nose that is involved in the purification of Inhaled Air.
33. How many bones are there in the average person’s body?
[A] 33
[B] 206
[C] 639
[D] It varies by individual
Show Answer
Correct Answer: B [206]
Notes:
206 bones are there in the average person’s body. These include the bones of the skull, spine, ribs, arms and legs. Bones are made up of connective tissue reinforced by calcium and specialized bone cells.
34. Which of the following are also called natural killer cells?
[A] Monocytes
[B] Thrombocytes
[C] Lymphocytes
[D] Neutrophils
Show Answer
Correct Answer: C [Lymphocytes]
Notes:
Lymphocytes are also called natural killer cells and play a vital role in producing antibodies. Lymphocytes are of two types – B lymphocytes and T lymphocytes.
35. Where Kidneys are present in our body?
[A] At back, just above the waist
[B] At back, behind lungs
[C] Near belly button
[D] Behind pancreas gland
Show Answer
Correct Answer: A [At back, just above the waist]
Notes:
The kidneys are present on either side of the spine at the lower level of the rib cage, in a distal part of the abdomen partially covered by ribs.
36. Which disease is not a reason for animal disease?
[A] Genetic diseases
[B] Deficiency diseases
[C] Environmental discomforts
[D] Hygiene and cleanliness
Show Answer
Correct Answer: D [Hygiene and cleanliness]
Notes:
The Animal disease is a condition of discomfort associated with disturbed or abnormal functioning of the animal body due to genetic diseases, faulty nutrition or deficiency diseases, unsuitable discomforts, and the onslaught of pathogens.
37. Syphilis is a bacterial infection usually spread by __
[A] Sexual contact
[B] Wound infection
[C] Air-borne droplets
[D] None of these
Show Answer
Correct Answer: A [Sexual contact]
Notes:
Syphilis is a bacterial infection mostly spread by sexual contact. It is caused by Treponema pallidum bacteria.
38. What is thick vein present in the middle of the leaf called?
[A] Leaf venation
[B] Parallel venation
[C] Midrib
[D] Reticulate
Show Answer
Correct Answer: C [Midrib]
Notes:
A thick vein seen in the middle of the leaf is called the midrib. Pinnately veined leaves have one large central vein, called the midrib, which extends from the base of the blade to its tip. Other large veins branch off on each side of the midrib. The leaves of beech, birch, and elm trees have such a vein pattern.
39. Which one of the following forms the base of vegetable fibres?
[A] Fats
[B] Oils
[C] Cellulose
[D] Proteins
Show Answer
Correct Answer: C [Cellulose]
Notes:
The principal chemical component of vegetable fibres is cellulose, with varying amounts of lignin and hemicelluloses also usually present; thus, the fibres are also referred to as cellulosic or lignocellulosic. Examples include cotton, hemp, jute, flax, ramie, sisal, bagasse, and banana. Vegetable fibres are usually stiffer but less tough than synthetic fibres.
40. Which of the following are the largest fixator of solar energy?
[A] Bacteria
[B] Protozoa
[C] Fungi
[D] Green plants
Show Answer
Correct Answer: D [Green plants]
Notes:
Plants and photosynthetic organisms utilize this solar energy in fixing large amounts of CO2 while amounts consumed by human beings are relatively small representing only 10% of the energy converted during photosynthesis. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.
