MCQOPTIONS
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MCQOPTIONS
This section includes 167 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Protein portion of an enzyme when it is combined with organic molecule is termed as |
| A. | apoenzyme |
| B. | co-enzyme |
| C. | holoenzyme |
| D. | co-factors |
| Answer» B. co-enzyme | |
| 2. |
In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A ---(E1)---> B ---(E2)---> C ---(E3)---> |
| A. | A, B, C, and D will all still be produced |
| B. | A, B, and C will still be produced, but not D |
| C. | A and B will still be produced, but not C or D |
| D. | A will still be produced, but not B, C, or D |
| Answer» D. A will still be produced, but not B, C, or D | |
| 3. |
Functions of liver does not include |
| A. | digestion of fats |
| B. | detoxication of alcohol |
| C. | carbohydrate digestion |
| D. | iron storage |
| Answer» D. iron storage | |
| 4. |
At a pH 7 to 4.5, the activity of amylase |
| A. | stops |
| B. | slows |
| C. | expedites |
| D. | ends |
| Answer» C. expedites | |
| 5. |
Amylase becomes denatured at a acidic pH of |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |
| 6. |
Enzyme activity can also be charted through the |
| A. | rate of digestion |
| B. | rate of reaction |
| C. | level of pH |
| D. | number of active sites |
| Answer» C. level of pH | |
| 7. |
Metals is produced as waste in industries like |
| A. | skiing |
| B. | mining |
| C. | electroplating |
| D. | digging |
| Answer» D. digging | |
| 8. |
Glycogen (C₂₄H₄₂O₂₁) is converted to glucose (C₆H₁₂O₆) through enzyme known as |
| A. | Rennin |
| B. | Mucin |
| C. | Adrenaline |
| D. | Erepsin |
| Answer» D. Erepsin | |
| 9. |
When body produces enzymes? |
| A. | regularly |
| B. | only when they are needed |
| C. | on a cyclic routine |
| D. | commonly found in blood |
| Answer» C. on a cyclic routine | |
| 10. |
Conserving metals may decrease |
| A. | environmental pollution only |
| B. | waste disposal only |
| C. | minerals in the crust |
| D. | environmental pollution and waste disposal |
| Answer» E. | |
| 11. |
Making new containers from crushed glass helps to |
| A. | save materials only |
| B. | save fuel only |
| C. | increase pollution |
| D. | save materials and fuel |
| Answer» E. | |
| 12. |
Very low temperatures make the enzyme |
| A. | hyperactive |
| B. | freeze |
| C. | dissolve in water |
| D. | inactive |
| Answer» E. | |
| 13. |
Inactive trypsinogen is converted to active form trypsin through enzyme called as |
| A. | thrombin |
| B. | thrombokinase |
| C. | enterokinase |
| D. | pancreatic lipase |
| Answer» D. pancreatic lipase | |
| 14. |
Amylase works optimally at a pH of |
| A. | 4 |
| B. | 4.5 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 15. |
Beyond optimum temperature, the enzyme becomes |
| A. | flat only |
| B. | hyperactive only |
| C. | flat and hyperactive |
| D. | denatured |
| Answer» E. | |
| 16. |
Small intestine is attached to dorsal body through |
| A. | villi |
| B. | agglutination |
| C. | lymphatics |
| D. | mesenteries |
| Answer» E. | |
| 17. |
Thinner center and thicker edge is a characteristic of |
| A. | red blood cells |
| B. | white blood cells |
| C. | platelets |
| D. | antibodies |
| Answer» B. white blood cells | |
| 18. |
Special kind of protein containing iron is called as |
| A. | hormones |
| B. | hemoglobin |
| C. | fibrinogen |
| D. | globulins |
| Answer» C. fibrinogen | |
| 19. |
Peristalsis helps in |
| A. | absorption of minerals |
| B. | passing food from small intestine to large intestine |
| C. | passing food through esophagus |
| D. | passing food from stomach to small intestine |
| Answer» D. passing food from stomach to small intestine | |
| 20. |
Which statement in case of red blood cells (RBC) is true |
| A. | have nucleus |
| B. | can repair the damage through new protoplasm |
| C. | are destroyed in spleen |
| D. | are permanent cells |
| Answer» D. are permanent cells | |
| 21. |
Glucose oxidase and peroxidase aid in |
| A. | making chocolates |
| B. | dying leather |
| C. | detecting presence of sugar in urine |
| D. | making sweets |
| Answer» D. making sweets | |
| 22. |
Pepsinogen is converted to pepsin through |
| A. | benzoic acid |
| B. | peptic acid |
| C. | hydrochloric acid |
| D. | chloroform |
| Answer» D. chloroform | |
| 23. |
Nature of rennin enzyme is slightly |
| A. | acidic |
| B. | alkaline |
| C. | water based |
| D. | mineral based |
| Answer» B. alkaline | |
| 24. |
The function of the cuticle is to support |
| A. | xylem |
| B. | phloem |
| C. | cortex |
| D. | water conservation in stem |
| Answer» E. | |
| 25. |
In order to increase the rate of reaction, the |
| A. | limiting factor shall increase |
| B. | limiting factor shall decrease |
| C. | substrate concentration shall be increased |
| D. | enzyme concentration shall be increased |
| Answer» C. substrate concentration shall be increased | |
| 26. |
In mammals, Bone marrow produces |
| A. | red blood cells |
| B. | white blood cells |
| C. | platelets |
| D. | antibodies |
| Answer» B. white blood cells | |
| 27. |
In mammals all is true about Red Blood Cells (RBCs) , but |
| A. | has a diameter of .01 mm |
| B. | contains nucleus |
| C. | are biconcave in appearance |
| D. | can squeeze through capillaries |
| Answer» C. are biconcave in appearance | |
| 28. |
Inactive Trypsinogen is converted to active form called as |
| A. | erepsin |
| B. | pepsin |
| C. | rennin |
| D. | trypsin |
| Answer» E. | |
| 29. |
The organ of the left side of the abdominal cavity is called |
| A. | sphincter muscle |
| B. | liver |
| C. | stomach |
| D. | diaphragm |
| Answer» D. diaphragm | |
| 30. |
Binding of enzyme and substrate on active site is explained through |
| A. | hide and seek hypothesis |
| B. | lock and hide hypothesis |
| C. | lock and run hypothesis |
| D. | lock and key hypothesis |
| Answer» E. | |
| 31. |
Starch (C₆H₁₀O₅)n is a form of |
| A. | proteins |
| B. | fats |
| C. | minerals |
| D. | carbohydrate |
| Answer» E. | |
| 32. |
PH value of above 7 indicates |
| A. | pure water |
| B. | pure enzyme |
| C. | pure alkaline |
| D. | pure acidic |
| Answer» D. pure acidic | |
| 33. |
More the hydrogen peroxide (H₂O₂) in urine, the |
| A. | lighter the color of the strip |
| B. | acidic the urine be |
| C. | darker the color of the strip |
| D. | more healthier a person be |
| Answer» D. more healthier a person be | |
| 34. |
Pyloric sphincter helps in |
| A. | transporting food for storage |
| B. | egestion |
| C. | transporting food from stomach to small intestine |
| D. | excretion |
| Answer» D. excretion | |
| 35. |
Breakdown of hemoglobin |
| A. | happens in small intestine |
| B. | results in production of bile |
| C. | iron is stored in cortex of kidneys |
| D. | increases iron in nitrogenous wastes |
| Answer» C. iron is stored in cortex of kidneys | |
| 36. |
Organic catalysts may also be called as |
| A. | Chemical Catalysts |
| B. | Biological catalysts |
| C. | Physical catalysts |
| D. | Situational Catalysts |
| Answer» C. Physical catalysts | |
| 37. |
Lipases helps in digestion of |
| A. | lipids |
| B. | carbohydrates |
| C. | proteins |
| D. | liver juices |
| Answer» B. carbohydrates | |
| 38. |
Foam rubber is produced when latex is combined with |
| A. | papain |
| B. | catalase |
| C. | proteases |
| D. | lipases |
| Answer» C. proteases | |
| 39. |
Neutral point like water (H₂O) has a pH of |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 10 |
| Answer» D. 10 | |
| 40. |
Function of trace elements is to trace the benefits of |
| A. | minerals |
| B. | vitamins |
| C. | proteins |
| D. | none of others |
| Answer» E. | |
| 41. |
Cell within a circular biconcave shape is called as |
| A. | mitochondrion |
| B. | chromatin |
| C. | centrioles |
| D. | hemoglobin |
| Answer» E. | |
| 42. |
Glucose (C₆H₁₂O₆) is converted to glycogen (C₂₄H₄₂O₂₁) through enzyme called |
| A. | pepsin |
| B. | glucagon |
| C. | adrenaline |
| D. | insulin |
| Answer» E. | |
| 43. |
Bile, secreted by liver is |
| A. | acidic base |
| B. | alkaline base |
| C. | neutral |
| D. | depends upon the type of food to be digested |
| Answer» C. neutral | |
| 44. |
Sucrose (C₁₂H₂₂O₁₁) is also known as |
| A. | peptidase |
| B. | invertase |
| C. | protease |
| D. | enterokinase |
| Answer» C. protease | |
| 45. |
Fiber is important for the proper functioning of |
| A. | liver |
| B. | large intestine |
| C. | kidneys |
| D. | small intestine |
| Answer» C. kidneys | |
| 46. |
Inactive Trypsinogen is formed in |
| A. | small intestine |
| B. | liver |
| C. | stomach |
| D. | Pancreas |
| Answer» E. | |
| 47. |
Enzyme pepsin has been named after the |
| A. | substance upon which it acts like pepsin |
| B. | byproduct it produces like peptic acid |
| C. | person who isolated it from the plants body |
| D. | person who discovered it |
| Answer» E. | |
| 48. |
The enzyme, Papain is found in |
| A. | pawpaw |
| B. | proteases |
| C. | pepsin |
| D. | pancreatic amylase |
| Answer» B. proteases | |
| 49. |
Amylase becomes denatured at a alkaline pH of |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» E. | |
| 50. |
Most reactions in living cells are |
| A. | reversible |
| B. | irreversible |
| C. | static |
| D. | redox |
| Answer» B. irreversible | |