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BIOLOGY SOLVED MCQs

1. Which is the largest gland found in the human body?

a. Thyroid               

b. Liver                  

c. Pancreas             

d. Stomach

2. Water has maximum density at____________?

a. 0°C                     

b. 4°C                     

c. 4° K                    

d. 48°F

3. What is called the scientific study of living?

a. Anatomy             

b. Zoology               

c. Botany                

d. Biology

4. The word “Biology” has been derived from_________ word?

a. Latin                   

b. English                

c. Greek                 

d. French

5. According to modern system of taxonomy, living organisms have been classified into the _____________?

a. Three Kingdoms     

b. Five Kingdoms          

c. Two Kingdoms     

d. Six Kingdoms

6. Kingdom Protoctista belongs to which of the following?

a. Fungi                  

b. Prokaryotes                  

c. Protists              

d. Piantae

7. The study of organisms inhabiting the sea and Ocean and the physical and chemical characteristics of their environment is:

a. Water Biology   

b. Marine Biology   

c. Environmental Biology  

d. Fresh Water Biology

8. Which of the following is not recycled in the ecosystem?

a. Wind                   

b. Carbon                

c. Oxygen               

d. Energy

9. Endocrine system consists of _______ glands or tissues.

a. 20                       

b. 25                      

c. 30                       

d. 35

10. Nuclein is in its nature is __________.

a. sweet                 

b. acidic                 

c. neutral                 

d. salty

11. Medulla oblongata and pons are collectively called _________?

a. Brain stem                   

b. Brain base           

c. Brain root            

d. Brain Nerves

12. The actual number of naturally accusing chemical elements involved in the biochemical reaction is;

a. 126                     

b. 46                       

c. 92                       

d. 206

13. Which is not a category of classification in biology?

a. ecotype              

b. Species               

c. Genus                 

d. Order

14. Which of the following bonds are broken during the oxidation-reduction reaction?

a. C-H                     

b. C-N                     

c. C-O                              

d. C-S

15. All of the following can treat kidney stones except?

a. Medicine             

b. Surgery               

c. Lithotripsy           

d. Dialysis

16. Which structure gives ability to the bacterial cell to form biofilm?

a. Slime                  

b. Mesosomes        

c. Capsule              

d. Flagella

17. In humans no of the tetrads formed during mitosis is __________?

a. 23                       

b. 46                       

c. 0              

d. None of Them

18. The scientific or biological name of the cat is _________?

a. Felis                   

b. Ficus                   

c. Homo        

d. Tigris

19. Path of the Blood present in vessels called __________?

a. Capillaries           

b. Lumen               

c. Platelets              

d. Plasma

20. How many of the bio elements constitute 99% of the total human body?

a. 8                        

b. 4                        

c. 6              

d. 2

21. Bacteria protect themselves from viruses by fragmenting viral DNA with ______.

a. Ligase                 

b. Endonuclease    

 c. Exonuclease       

d. Gyrase

22. The expression of a transgene in the target tissue is identified by a __________.

a. Transgene           

b. Promoter             

c. Enhancer             

d. Reporter

23. The energy currency of the cell is called ___________.

a. ATP                    

b. DNA                    

c. RNA                    

d. ADP

24. During anaerobic respiration the final electron acceptor in the electron transport chain is:

a. Molecular oxygen           

b. NADP+               

c. water                  

d. Sulfate

25. During the fermentation process…… ATP molecules are produced per glucose molecule.

a. 2                        

b. 4                        

c. 6                         

d. 8

26. PCR technique was invented by__________.

a. Kerry Mullis                 

b. Boyer                  

c. Sanger                

d. Cohn

27. RNA interference helps in__________.

a. Cell proliferation   

 b. Micro propagation    

c. Cell defence    

d. Cell differentiation

28. The first ever transgenic plant to be produced is__________.

a. Wheat                 

b. Tobacco            

c. Rice                    

d. Cotton

29. The DNA fragments have sticky ends due to___________.

a. Endonuclease      

b. Unpaired bases            

c. Calcium ions        

d. free methylation

30. What is the nickname of glucose?

a. Dextrose            

b. Sugar                  

c. Glycogen             

d. Starch

31. Variation in the size of red blood cells is called __________.

a. hypochromia        

b. Anisocytosis      

c. Poikilocytosis       

d. Polychromatophilia

32. Bean-shaped cells in plants are called ________.

a. Mesophyll cells    

b. Xylem Cells         

c. Phloem Cells       

d. Guard Cells

33. Lungs are situated in the __________.

a. abdominal cavity     

b. pericardial cavity         

c. Buccal cavity       

d. Thoracic cavity

34. Who is called the Father of Biotechnology?

a. Karl Ereky   

b. Alexander          

c. Darwin                

d. Louis pasture

35. The Process of egg formation in the female is called ________.

a. oocyte                

b. oogenesis          

c. Oviduct              

d. None of them

36. Who is called the father of Genetics?

a. Morgan              

b. Darwin               

c. Aristotle             

d. Mendel

37. ___________ is the Link between living and non-living organisms.

a. Bacteria             

b. Virus                  

c. Cyanobacteria              

d. Plants

38. There are about _________ muscles found in the human body.

a. 206                     

b. 300                     

c. 650                     

d. 703

39. A single heartbeat involves ________ stages.

a. 1                        

b. 2                        

c. 3                        

d. 4

40. Which of the following diseases induces immunity?

a. Smallpox            

b. Jaundice             

c. Diabetes             

d. Polio

41. On average, the human heart beats about ________ times in one’s life.

a. 2.8 Billion           

b. 3.7 Billion            

c. 4.2 Billion            

d. 4.5 Billion

42. Which of the following cell organelles does not contain DNA?

a. Nucleus               

b. Lysosomes        

c. Chloroplast          

d. None of them

43. The small intestine has three parts. The first part is called________.

a. Duodenum         

b. Oesophagus        

c. Larynx                 

d. None of them

44. Human skin colour is _________.

a. Multifactorial        

b. Pleiotropic           

c. Polygenic           

d. Epistatic

45. Which of the following allows precise muscular movements?

a. Cerebrum            

b. Cerebellum        

c. Thalamus            

d. Hypothalamus

46. Prokaryotes don’t have________.

a. Cell membrane    

b. Nucleus             

c. Cytoplasm           

d. None of them

47. Blood vessels which carry deoxygenated blood are called__________.

a. Arteries               

b. Veins                 

c. Capillaries           

d. All of them

48. Which one of the following is called the Blood Bank?

a. Kidneys               

b. Liver                   

c. Spleen                

d. Heart

49. Fresh Yeast cells are a good source of ___________.

a. Vitamin-B           

b. Nicotine               

c. Morphine             

d. Vitamin-K

50. Fermentation takes place in which component of a cell?

a. Cytoplasm          

b. Nucleus               

c. Mitochondria        

d. Vacuole

51. Which is the most minor gland in the human body?

a. Pituitary Gland               

b. Pineal Gland      

c. Adrenal Gland      

d. Parathyroid

52. Cells use _______ to make proteins.

a. DNA                    

b. RNA                   

c. Ribosomes                    

d. Cytoplasm

53. Acid that is present in gastric juice is_________.

a. Hydrochloric Acid        

b. Citric Acid           

c. Sulphuric Acid      

d. Acetic Acid

54. Which blood cells are called ‘Soldiers’ of the body?

a. WBC                  

b. Platelets              

c. RBC          

d. All of the them

55. The gall bladder releases _________ enzyme to digest the food.

a. Pepsin                

b. HCl           

c. Both of them      

d. None of them

56. The enzyme which is secreted by the salivary gland is?

a. Pepsin                

b. Ptyalin     

c. Lactamase                    

d. Bile

57. Genetic information is carried in the form of a long chain of molecules made up of _________.

a. Amino acids         

b. RNA          

c. Nucleotides        

d. Polypeptides

58. How many nucleosomes are found in the 30 nm chromatin fiber helical coil?

a. 12                       

b. 10             

c. 09                       

d. 06

59. In the human body, fats are stored in the__________.

a. Epidermis            

b. Adipose tissue             

c. Liver         

d. Epithelium

60. Blood does not clot in the blood vessels due to the presence of ___________.

a. Thrombin           

b. Fibrinogen           

c. Heparin               

d. Prothrombin

61. The sum of genes in a population is called ________.

a. Genotype            

b. Karyotype           

c. Gene pool          

d. Lethal gene

62. Which of the following cells secrete insulin?

a. Alpha cells           

b. Delta cells           

c. Nerve cells      

d. Beta cells

63. Which part of the nervous system controls the activities of internal organs?

a. Spinal cord          

b. Cerebrum            

c. Cerebellum          

d. Medulla Oblongata

64. Metabolism of photosynthesis and respiration involves the knowledge of____________.

a. Genetic engineering       

b. Biotechnology      

c. Biochemistry      

d. Chemistry


Also Read the Following Suggested Topics for Further Reading

1. Laws of Inheritance in Biology Solved MCQs

2. Nutrition in Plants Solved MCQs

3. Bioenergetics in Plants Solved MCQs

4. Respiration in Plants and Animals Solved MCQs

5. Reproduction in Plants and Animals Solved MCQs

6. Animal and Plant Cell Solved MCQs

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Location: Larkana, Sindh, Pakistan

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