11. Malaria fever is caused by which of the following reasons? (UPSC Prelims 1991)
[A] Immediately after mosquito bite
[B] Upon disintegration and bursting of red blood cells
[C] When the malaria causing germs reach the liver
[D] Upon release of toxins into blood
Show Answer
Correct Answer: D [Upon release of toxins into blood]
Notes:
Malaria is a life-threatening disease. It’s typically transmitted through the bite of an infected Anopheles mosquito. Infected mosquitoes carry the Plasmodium parasite. When this mosquito bites you, the parasite is released into your bloodstream.
12. Match List I with List II and select the correct answer using the codes given below the lists.
|
List I
|
List II
|
|
A. Islets of Langerhans
|
1. Calcitonin
|
|
B. Pituitary gland
|
2. Epinephrine
|
|
C. Thyroid gland
|
3. Growth hormone
|
|
D. Adrenal gland
|
4. Insulin
|
Codes:
A B C D (UPSC Prelims 1995)
[A] 4 3 2 1
[B] 4 3 1 2
[C] 3 4 1 2
[D] 3 2 4 1
Show Answer
Correct Answer: B [4 3 1 2]
Notes:
• The islets of Langerhans are a cluster of cells within the pancreas that are responsible for the production and release of hormones that regulate glucose levels.
• Growth hormone is also called somatotropin or human growth hormone, peptide hormone. It is secreted by the anterior lobe of the pituitary gland. It stimulates the growth of essentially all tissues of the body, including bone.
• Calcitonin is a hormone that is produced in humans by the parafollicular cells of the thyroid gland. Calcitonin is involved in helping to regulate levels of calcium and phosphate in the blood, opposing the action of parathyroid hormone.
• Hormones secreted by the adrenal medulla are Epinephrine. Most people know epinephrine by its other name—adrenaline. This hormone rapidly responds to stress by increasing your heart rate and rushing blood to the muscles and brain.
13. Fat present below the skin surface in our body, acts as a barrier against which of the following losses? (UPSC Prelims 1996)
[A] Loss of heat from the body
[B] loss of essential body fluids
[C] loss of salts from the body
[D] entry of harmful micro-organisms from the environment
Show Answer
Correct Answer: A [Loss of heat from the body]
Notes:
Adipose tissue that’s fat cells which are under the skin act as barrier to loss of the heat from the body and it protects the skin from entering of highly reactive UV rays of the sun. Fat present below the skin surface in our body, act as an insulator against loss of heat from the body. The deposited fat works as barrier, which prevents loss of heat.
14. Which among the following is the longest bone in human body?
[A] Stapes
[B] Femur
[C] Pelvis
[D] Sternum
Show Answer
Correct Answer: B [Femur]
Notes:
Femur is the longest and strongest bone in the human body. It is also called as the thigh bone.
15. Which gas is absorbed by the plants during photosynthesis?
[A] Oxygen
[B] Carbon dioxide
[C] Nitrogen
[D] Hydrogen
Show Answer
Correct Answer: B [Carbon dioxide]
Notes:
During the process of photosynthesis, plants take carbon dioxide and water and produces oxygen and glucose in the presence of light.
16. Whooping cough is caused by which of the following?
[A] Bordetella pertussis
[B] Helicobacter pylori
[C] Yersinia pestis
[D] Treponema pallidum
Show Answer
Correct Answer: A [Bordetella pertussis]
Notes:
Pertussis is a respiratory disease commonly known as whooping cough. It is a very contagious disease caused by a type of bacteria called Bordetella pertussis.
17. Which of the following is a true moss?
[A] Club moss
[B] Reindeer moss
[C] Irish moss
[D] Bogg moss (Sphagnum)
Show Answer
Correct Answer: D [Bogg moss (Sphagnum)]
Notes:
Because club moss is pteridophyte and reindeer moss and Irish moss are lichens.
18. Removal of excess water from the xylem at the edges of the leaves when the stomata are closed is known as__?
[A] Guttation
[B] Transpiration
[C] Photosynthesis
[D] Storage
Show Answer
Correct Answer: A [Guttation]
Notes:
Removal of excess water from the xylem at the edges of the leaves when the stomata are closed is known as Guttation.
19. Which plant tissue consists of phloem and xylem?
[A] Complex Permanent Tissue
[B] Simple Permanent Tissue
[C] Parenchyma Tissue
[D] Collenchyma Tissue
Show Answer
Correct Answer: A [Complex Permanent Tissue]
Notes:
Complex Permanent Tissue tissues include phloem and xylem. Xylem helps in the transport of water and soluble components.
Phloem helps in the transportation of food particles.
20. What are the functions of flowers?
[A] Pollination
[B] Reproduction
[C] Fruit formation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Flowers are the most colorful component of the plant. The functions of flowers are pollination, reproduction, and fruit formation.
