All Biology questions asked in 2021 SSC exams

All Biology questions asked in 2021 SSC exams 

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1. Which vitamin is also called as ‘cyanocobalamin’ ? Vitamin B12
2. A type of asexual reproduction in which new plants are produced from roots, stems, leaves and buds are known as; Vegetative propagation
3. Plants release water into the air by the process of ? Transpiration
4. Which plant hormone regulates growth, particularly by stimulating cell elongation in stems ? Auxin 
5. Energy and carbon requirements of the autotrophic organisms are fulfilled by ? Photosynthesis
6. The _____ is the term used for the reactions of photosynthesis that use the energy stored by the light-dependent reactions to form glucose and other carbohydrate molecules. Calvin cycle
7. What is the botanical name of mango ? Mangifera indica
8. Which organism break down the food material outside the body and then absorbs it ? Yeast
9. When the breakdowns of food occurs without the use of oxygen, it is called ?  Anaerobic respiration
10. ______ disease is caused by Bacteria. Diphtheria
11. In animal cells, which are the cell’s ‘garbage disposal’ ? Lysosomes
12. Kala – azar disease is caused by ___. Protozoa
13. Which disease is not caused by a virus ? Plague
14. The liver is affected and skin and eyes turn yellow due to the deposit of bile pigments. Which digestive disorder is described here? Jaundice
15. Starch and suger in our food are forms of ____ . ? Carbohydrate
16. Which part of a flower is the sticky surface at the top of the pistil, it traps and holds the pollen? Stigma
17. ______ includes glycogen, poly-- hydroxybutyrate granules, sulphur granules and gas vesicles. Cytoplasm
18. ____ was the first person who discovered cells. Robert hooke
19. The nucleus of a cell is surrounded by a jelly-like substance called; Cytoplasm
20. From which source does the brain get the energy ? Glucose
21. Vitamin B12 generally not present in ? Plant foods
22. The nephron is the microscopic structural and functional unit of the; Kidney
23. Amino acids are often referred to as the building blocks of ? Proteins
24. ______ is a part of a leaf. Petiole
25. ______ is an essential element used in the synthesis of proteins in plants. Nitrogen
26. The ____ is an autotroph. Plant
27. Which gas is released in the process of photosynthesis ? Oxygen
28. A mango tree is an example of ? An autotroph
29. Which is one of the basic plant nutrients of fertilizers that are commonly used in agriculture ? Potassium 
30. The pores present on the surface of leaves are known as ; Stomata
31. The application of plant and soil science to crop production is known as ? Agronomy
32. Which is the water transporting tissue in plants ? Xylem
33. The __________ is not the main function of the root system of a plant. Supply of food to plant parts 
34. Which part of body is associated with the rickets disorder ? Bones
35. ____ and ____ are the water- soluble vitamins. Vitamin B and Vitamin C
36. ______ disease is caused by a Parasite. Malaria 
37. AMR occurs when bacteria, viruses, fungi and parasites change over time and no longer respond to medicines making infections harder to treat and increasing the risk of disease spread, severe illness and death. What is the full form of AMR? Antimicrobial Resistance
38. Leprosy is caused by a bacterium called; Mycobacterium leprae
39. Another name for the disorder called ‘parasomnia’ Sleepwalking
40. ____ is not a water or hygiene-related disease. Diabetes
41. Trachoma is a preventable disease that results from poor hygiene and sanitation. Which body parts does it affect? Eye
42. Down syndrome, which causes learning difficulties and physical health development delays and disabilities, is a ; Genetic disease
43. Which disease is caused by Helicobacter pyroli ? Gastritis
44. Which disease is caused by Leishmania, a protozoan organism ? Kala-azar
45. The cause of Siderosis is excessive deposition of ____ in the body tissue. Iron
46. Which is a vector-borne disease ? Malaria
47. Which disease damages the eye’s optic nerve and results in vision loss and blindness and occurs when the normal fluid pressure inside the eyes slowly rises ? Glaucoma
48. Which is a rare disease caused by the deficiency of vitamin D that causes the bones to become soft and to bend ? Rickets
49. Rickets and night – blindness are caused by the deficiency of ______ and _____. Vitamin D , Vitamin A
50. _____ disease is not caused by ingesting polluted water ? Rabies
51. How many bones are there in human hand ? 27
52. Which is the largest dental tissue ? Dentin
53. Which is the smallest bone in the human body ? Stapes
54. What is the loss of bone density and strength known as ? Osteoporosis 

55. The fluid present between joints, that makes the movement of joints easy, is called ; Synovial
56. _____ is caused when a child’s growing bones fail to develop due to a lack of vitamin D. Rickets
57. Which factor is responsible for the disease called ‘Mad Hatter Disease’ ? Mercury poisoning
58. Which causative agent is responsible for spreading AIDS ? Virus
59. The deficiency of vitamin _____ causes Pellagra. B3
60. Which microorganism causes Cholera ? Bacteria
61. ___________ is a disease that not caused by flavivirus. Polio
62. Deficiency of Vitamin K in our body leads to; Delayed clotting of blood
63. _____ is an example of an infectious diseas. Tuberculosis 
64. Which disease is caused by a protozoa parasite of Leishmania species ? Kala-azar
65. Kwashiorkor disease occurs due to severe deficiency of ______ in the body. Protein
66. Which disease marked by dementia, diarrhoea and dermatitis, is also known as ‘the three Ds’ ? Pellagra
67. Which causative agent causes the disease of malaria ? Parasite
68. Which bacterium is responsible for peptic ulcers ? Helicobacter pylori
69. Which causative agent causes the disease Ebola ? Virus
70. ______ is caused by fungus. Ringworm
71. How many arteries are there in an umbilical cord ? Two 
72. _______ is the ability of a single cell to produce a fertile, adult individual. Totipotency
73. Which is the largest cell in the human body ? Ovum
74. Which are the cellular structures responsible for protein synthesis ? Ribosomes
75. The sorting, tagging, packaging and distribution of lipids and proteins in the human body take place in the ; Golgi apparatus
76. Which is called the ‘powerhouse of the cell’ ? Mitochondria 
77. Which body part behaves like a stretched rubber sheet ? Eardrum
78. The size of the pupil of the eye is controlled by ? Iris
79. What is the coloured ring of tissue behind the cornea called, that regulates the amount of light entering the eye, by adjusting the size of pupil ? Iris
80. What do you call the transparent front part of the eye ? Cornea
81. Which tissue is a protective tissue in the animal body ? Epithelial tissue
82. Lymph is a light clear fluid made up of white blood cells that attack harmful _____ in the blood. Bacteria
83. Which is a large bean shaped lymphoid organ in the human body ? Spleen
84. Correct statement question
   The normal systolic pressure is about 120 mm of Hg and diastolic pressure is 80 mm of Hg
85. Swollen bluish veins resulting from the valves that do not close properly are called___ ? Varicose veins
86. ____ are not a type of blood cell made by the bone marrow. Osteoclasts
87. ____ is the structural and functional unit of the kidney. Nephron
88. Which chemical is responsible for the yellow colour in urine ? Urobilin
89. What is a leaf- shaped flap of cartilage located behind the tongue, at the top of the larynx or voice box called ?   Epiglottis
90. Which part of the body/glands maintains the body temperature ? Hypothalamus
91. ____ glands releases tears from our eyes. Lacrimal
92. Proboscis gland for excretion is present in the phylum. Hemichordata
93. Which gland produces Cortisol often known as a ‘stress hormone’ in humans ? Adrenal gland
94. The growing voice box in boys can be seen as a protruding part of the throat called____. Adam’s apple
95. Which part of the plant allows for the uptake of carbon dioxide and limits the loss of water due to evaporation ? Stomata
96. What is the network of air tubes for gas exchange in insects ? Tracheae
97. _____ is a branch of biology that studies fungi. Mycology
98. The scientific study of dreams is called ____. oneirology
99. Cytology is related to the study of ? Cells
100. What does Ichthyology deal with ? Study of fish

101. What is Agraphia ? Loss of the ability to write 
102. Which organs secrets hydrochloric acid that helps our body in killing pathogenic bacteria? Stomach
103. Incorrect statement The liver is situated in the upper part of the abdomen on the left side (this statement is incorrect)
104. A large, muscular sheet called _____ forms the floor of the chest cavity. Diaphragm
105. Which is the indigestible portion of our diet essential to the health of the digestive system  ? Roughage
106. What converts glucose into glycogen (a complex carbohydrate used for storage) and amino acids into proteins ? Liver 
107. Which acid is released by the gastric glands present in the stomach ? Hydrochloric acid
108. Complex food substances break down into simpler ones with the help of ? Enzymes
109. Which part of the digestive system receives secretions from the liver and the pancreas ? Small intestines
110. In which part of the human body will you find the ‘superior rectus’ ? Eye
111. _______ is not a part of the hind-brain. Hypothalamus
112. The vertebrae are a part of which body systems in humans ? Spinal cord
113. In which part of the human body is the masseter muscle located ? Jaw
114. Which is a pivotal joint in the human body ? Joint where our neck joins the head
115. Which is a complex strength that provides structural strength to plants ? Cellulose
116. The human shoulder joint is an example of a ____ joint. Bal and socket
117. Which tissue is responsible for the flexibility in plants? Collenchyma
118. Viscose fibre is obtained from ______. Cellulose
119. Carbon and energy requirements of an autotrophic organism are fulfilled by ______ . Photosynthesis 
120. Plants grown at which places take up carbon dioxide during the night ? Deserts
121. _______ root is not a storage root. Breathing root 
122. _______ is the pattern of veins in the blade of a leaf. Venation
123. Incorrect statement about bryophytes ‘The presence of a special tissue is found in them for the flow of water and other substances from one part of the plant body to another’ (the statement is not true)
124. Litmus solution is a purple dye, which is extracted from lichen, a plant belonging to the division ____. Thallophyta 
125. Which is another name for ‘white ant’ ? Termite
126. What do you call the property of an organism of self-regulation and the tendency to maintain a steady-state within an external environment which is liable to change ? Homeostasis
127. Which is sessile animal that relies upon its relationship with plants like algae to build the largest structures of biological origin on earth ? Coral
128. _______ fall under Phylum Cnidarian of the animal kingdom ? Corals
129. Sponges belongs to the phylum _____ of the animal kingdom. Porifera
130. Incorrect/false statement Elephants use their tails to keep themselves cool (the statement is not true) 
131. Which is also called ‘green algae’ ? Chlorophyceae
132. Which popular kitchen ingredients is called the ‘sugar eating fungus’ ? Yeast
133. Melatonim encodes proteins in cells to prevent _____ entry. Virus
134. Cuscuta is an example of ? Parasite
135. Tooth decay is caused by ? Bacteria
136. Glucagon, a peptide hormone, is produced by the _____. Pancreas
137. Enzyme linked immune-sorbent assay is a technique used in detection of which disease ? AIDS
138. Which hormone is secreted by the brain that helps to regulate sleep-wake cycles ? Melatonin
139. ______ contains an enzyme called lingual lipase, which breaks down fats. Saliva
140. How many recognized essential vitamins are there as of March 2021 ? 13
141. Onions produce the chemical irritant known as syn-propanethial-S-oxide; this stimulates the eyes’ ____ glands which release tears. Lachrymal
142. Who developed the cholera vaccine in 1885? Jaime Ferran
143. Who discovered the smallpox vaccine ? Edward jenner
144. Who discovered the TB vaccine ? Leon Calmette and Camille Guerin
145. For immunity against which disease is BCG vaccine given ? Tuberculosis
146. What does Ornithology deal with ? Study  of birds 
147. _____ is the field of study concentrated on pregnancy, childbirth and postpartum period. Obstetrics
148. What does Herpetology deal with ? Study of reptiles and amphibians 
149. Collagen is a type of ______. Protein
150. Spider webs are made up of ______, a natural fiber made up of protein. Silk
151. Which pigment causes the red colour in onions ? Anthocyanins
152. Which part of the human body has the growth stage divided into- Anagen, Catagen and telogen ? Hair
153. Which is a trace mineral found in the human body ? Selenium
154. Herbivores form the _____ trophic level in a food chain. Second
155. What is the term ‘circadian rhythm’ associated with ? Body clock
156. Which is a ruminant animal ? Cow
157. A/an _____ is any substance that causes your immune system to produce antibodies against it. Antigen

158. What is the full form of OCD? Obsessive- Compulsive Disorder

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