1. From which of the following sources can one obtain adult human stem cells?
[A] Liver
[B] Bone Marrow
[C] Brain
[D] Medulla
Show Answer
Correct Answer: B [Bone Marrow]
Notes:
Adult human stem cells, unlike embryonic stem cells, are found in adult tissues. Among the major sources, bone marrow is often used to procure these cells. They have the property to self-renew and differentiate into numerous types of specialized cells. Stem cells obtained from the bone marrow can form different cells including blood cells and cells that contribute to the immune system.
2. Which among the following virus is also called as “Hit & Hide” Virus?
[A] RSV Virus (respiratory syncytial virus )
[B] Dengue virus
[C] Influenza virus
[D] HIV virus
Show Answer
Correct Answer: A [RSV Virus (respiratory syncytial virus )]
Notes:
RSV Virus (respiratory syncytial virus) is also called as “Hit & Hide” virus. It causes infections of the lungs and respiratory tract. It is a major cause of lower respiratory tract infections.
3. Consider the following statements:
- Color blindness is more common in men.
- Color blindness is an X-linked recessive trait.
- If both the X chromosomes are defective, a woman may have color blindness.
Which of the above statements are correct?
[A] Only 1
[B] 1, 2 and 3
[C] 2 and 3
[D] Only 1 and 2
Show Answer
Correct Answer: B [1, 2 and 3]
Notes:
Color blindness is more prevalent in men as it is an X-linked recessive disorder. Men, having only one X chromosome, are more susceptible if it is defective. Women, with two X chromosomes, become color blind only if both carry the defective gene. All three statements accurately describe the inheritance and prevalence of color blindness.
4. Turmeric belongs to from which one of the following family of plants?
[A] Radish
[B] Ginger
[C] Onion
[D] Clove
Show Answer
Correct Answer: B [Ginger]
Notes:
Turmeric is a product of Curcuma longa, a rhizomatous herbaceous perennial plant belonging to the ginger family Zingiberaceae. They are native to tropical South Asia. There are 133 species of Curcuma all around the world.
5. 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.
6. The radiations used in Radiotherapy for the treatment of Cancer destroys the Cancer tumour mainly by which among the following?
[A] Destroying the Cytoplasm of the Cancerous Cells
[B] Destroying the Cell membranes of the Cancerous Cells
[C] Destroying the DNA of the Cancerous Cells
[D] Destroying the spindle fibres which are used in Cell Division
Show Answer
Correct Answer: C [ Destroying the DNA of the Cancerous Cells]
Notes:
The radiations used in Radiotherapy for the treatment of Cancer destroys the Cancer tumour mainly by Destroying the DNA of the Cancerous Cells. It uses high doses of radiation to kill cancer cells and shrink tumors.
7. 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.
8. Which of the following carries oxygen to various parts of human body?
[A] Red blood cells
[B] Nerves
[C] Plasma
[D] White blood cells
Show Answer
Correct Answer: A [Red blood cells]
Notes:
Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale.
9. Which of the following secrete the hormones necessary for the development of the human body? (UPSC Prelims 1983)
[A] Thyroid gland
[B] Pituatory gland
[C] Parathyroid gland
[D] Exocrine gland
Show Answer
Correct Answer: B [Pituatory gland]
Notes:
The pituitary gland is a small pea-sized gland that plays a major role in regulating vital body functions and general wellbeing. Through secretion of its hormones, the pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure and many other vital physical functions and processes.
10. Which of the following is the thermoregulatory centre of the man body? (UPSC Prelims 1991)
[A] Pituitary
[B] Skin
[C] Hypothalamus
[D] Thyroid
Show Answer
Correct Answer: C [Hypothalamus]
Notes:
The thermoregulatory center in the hypothalamus controls the temperature at which the human body operates. There are two sets of thermoreceptors involved in the controlling of the body temperature.
