General Science - Biology MCQs
71. Consider the following diseases:
- Dengue
- Leprosy
- Ebola virus disease (EVD)
Which of the above has/have been categorised as Neglected Tropical Disease(s) by WHO (World Health Organization)?
[A] 1 & 3 Only
[B] 2 Only
[C] 2 & 3 Only
[D] 1, 2 & 3
Show Answer
Correct Answer: D [ 1, 2 & 3]
Notes:
Neglected tropical diseases (NTDs) are a diverse group of communicable diseases that prevail in tropical and subtropical conditions. All of the above given diseases have been categorised as Neglected Tropical Diseases by WHO.
72. Consider the following diseases:
- Dengue
- Chikungunya
- Zika fever
- Yellow fever
Which of the above are spread by Aedes aegypti mosquito?
[A] 1 & 2 Only
[B] 1, 2 & 4 Only
[C] 2 & 4 Only
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [ 1, 2, 3 & 4]
Notes:
Aedes aegypti mosquito can spread yellow fever, dengue fever, chikungunya, Zika fever and other diseases. The mosquito can be recognized by white markings on its legs and a marking in the form of a lyre on the upper surface of its thorax.
73. Consider the following statements about the Elephantiasis:
- It is a Neglected Tropical Disease
- It is a parasitic infection
- It causes extreme swelling in the arms and legs
- It is transmitted from human to human via the female mosquito
Select the correct option from codes given below:
[A] 1, 2 & 3 Only
[B] 2 & 4 Only
[C] 1, 3 & 4 Only
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [ 1, 2, 3 & 4]
Notes:
All of the above given statements are correct Elephantiasis refers to a parasitic infection that causes extreme swelling in the arms and legs. The disease is caused by the filarial worm, which is transmitted from human to human via the female mosquito when it takes a blood meal. Chikungunya is a rare form of viral infection caused by an alpha virus that is spread by the mosquitoes of genus Aedes i.e. Aedes Aegypti, Aedes Albopicticus (Tiger mosquito). A type of bacteria called Corynebacterium diphtheria causes diphtheria. Malaria is a mosquito-borne infectious disease affecting humans and other animals caused by parasitic protozoans belonging to the Plasmodium type. It is transmitted to people through the bites of infected female Anopheles mosquitoes.
74. Consider the following differences between plant cell and animal cell:
- While plastids are usually present in plant cells, they are absent in animal cells
- While lysosomes are rare in plant cells, they are found in almost all animal cells
Which of the above statements is/are correct?
[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
A lysosome is a membrane-bound organelle found in nearly all animal cells. They are spherical vesicles which contain hydrolytic enzymes that can break down virtually all kinds of bio molecules. Besides degradation of polymers, the lysosome is involved in various cell processes, including secretion, plasma membrane repair, cell signalling, and energy metabolism. Plastids are thought to have originated from end symbiotic cyan bacteria. They are responsible for colour.
75. Consider the following:
- Spinal cord
- Neocortex
- Nephron
Which of the above are parts of central nervous system?
[A] 1 & 2 Only
[B] 1 & 3 Only
[C] 2 & 3 Only
[D] 1, 2 & 3
Show Answer
Correct Answer: A [1 & 2 Only]
Notes:
Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts in blood. In the human brain, the neocortex is the largest part of the cerebral cortex which covers the two cerebral hemispheres. The spinal cord is the most important structure between the body and the brain. It is a part of central nervous system.
76. Consider the following differences between Monocots and Dicots:
- While secondary growth is absent in monocots, it is present in dicots
- While monocots have fibrous root system, dicots have taproot system
Which of the above statements is/are correct?
[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Both are correct statementsA taproot is a large main root that comes off of the stem and has many smaller lateral roots; a fibrous root system has many roots of the same size that break off into small lateral roots. Dandelions, poison ivy and carrots are all examples of taproots; sweet potatoes are the fleshy part of a fibrous root.
77. Who coined the term “Tissue culture”?
[A] Montrose Thomas Burrows
[B] Jack Kevorkian
[C] Charles Scott Sherrington
[D] Ludvig Hektoen
Show Answer
Correct Answer: A [Montrose Thomas Burrows]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium separate from the organism. It refers to the culture of animal cells and tissues, with the more specific term plant tissue culture being used for plants. The term “tissue culture” was coined by American pathologist Montrose Thomas Burrows.
78. To which organ of the body is the disease ‘Glaucoma’ related to?
[A] Ear
[B] Heart
[C] Bones
[D] Eye
Show Answer
Correct Answer: D [Eye]
Notes:
Glaucoma is an eye disease that is often associated with elevated intraocular pressure, in which damage to the eye (optic) nerve can lead to loss of vision and even blindness.
79. Which of the following is the hybrid between a horse and a donkey?
[A] Mule
[B] Hule
[C] Tigon
[D] Zorse
Show Answer
Correct Answer: A [Mule]
Notes:
A mule is the offspring of a male donkey (a jack) and a female horse (a mare). A horse has 64 chromosomes, and a donkey has 62. The mule ends up with 63. Mules can be either male or female, but, because of the odd number of chromosomes, they can’t reproduce
80. Root hair in plants are produced from which of the following?
[A] cortex
[B] pericycle
[C] epidermis
[D] endodermis
Show Answer
Correct Answer: C [epidermis]
Notes:
Cells of the epidermis produce root hairs near the root apex. These cells are generally thin-walled, in contrast to the cells of the cortex, lying below the surface, which ultimately may become very thick-walled. The root hairs have fundamental importance in absorption of water and nutrients.
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