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1. Most screening tests for blood depend on the peroxidase activity of

  1. Haem  
  2. Antibody
  3. Urine  
  4. Protein

Answer and Explanation

2. A forensic scientist is supposed to answer the question when examining dried blood:

  1. Is it blood?
  2. Is it human blood?
  3. Which group does it belong to?
  4. All of the above

Answer and Explanation

3. The sequence of examination of bloodstain in chronological order is

  1. Benzidine test, haemin crystal test, immunological  test, and elution test
  2. Immunological test, benzidine test, haemin crystal test, and elution test
  3. Elution test, immunological test, haemin crystal test, and benzidine test
  4. Benzidine test, elution test, haemin crystal test, and immunological test

Answer and Explanation

4. Arrange the examination method of blood in the proper sequence:

(i) Benzidine Test (ii) Teichmon Test (iii) Precipitein Test (iv) Blood grouping

  1. (iv), (i), (ii), (iii)
  2. (iv), (iii), (i), (ii)
  3. (i), (ii), (iii), (iv)
  4. (i), (ii), (iv), (iii)

Answer and Explanation

5. Leucomalochite Green test is done for the examination of the following

  1. Urine
  2. Sweat
  3. Saliva
  4. Blood

Answer and Explanation

6. Assertion (A): Luminol reacts with H2O2 to locate blood samples.

Reason (R): Because H2O2 is catalyzed by heme, though heme does not take part in the reaction

  1. Both (A) and (R) are correct
  2. Both (A) and (R) are incorrect                        
  3. (A) is correct and (R) is incorrect          
  4. (A) is incorrect and (R) is correct

Answer

7. Gel electrophoresis is useful in the identification of the following:

  1. Blood
  2. Alkaloids
  3. Insecticides
  4. All the above

Answer and Explanation

8. The most suitable solvent system for chromatography of blood samples is:

  1. Chloroform: Ethanol (40: 60)
  2. Methanol: Water (70: 30)
  3. Methanol: Acetic acid: Water (90: 3: 7)
  4. Ethanol: Acetic acid: Water (92: 1: 7)

Answer and Explanation

9. Arrange the test methods of blood in the proper sequence:

(i) Benzidine (ii) Absorption elution (iii) Visual examination (iv) Takayama Crystal Test

  1.  (i), (ii), (lii), (iv)
  2.  (ii), (iii), (iv), (i)
  3.  (iii), (i), (iv), (ii)
  4.  (iv), (iii), (ii), (i)

Answer and Explanation

10. Assertion (A): Benzidine test is positive in blood.

Reason (R): Because of the presence of the peroxidase enzyme in the red cells.

  1. (A) is false but (R) is true
  2. (R) is false but (A) is true
  3. Both (A) and (R) are false
  4. Both (A) and (R) are true

Answer

11. The following tests are used to identify blood:

(i) Florence (ii) Kastle Meyer (iii) Ptyalin test (iv) Takayama

  1. (i), (iii), (iv) are correct
  2. (ii), (iii) are correct
  3. (ii), (iv) are correct
  4. (iii), (iv) are correct

Answer and Explanation

12. The phenolphthalein test is used for screening of the following:

  1. Sweat
  2. Urine
  3. Blood
  4. Both Urine and Blood

Answer and Explanation

13. Confirmatory tests for blood are

(i) Luminal test (ii) Hemin crystal test (iii) Wagenaar test (iv) Spectroscopic examination

  1. (ii), (iii) and (iv) are correct
  2. (i) and (iv) are correct
  3. (ii) and (iv) are correct
  4. (i) and (iii) are correct

Answer and Explanation

14. Takayama reagent consists of:

  1. Sodium Hydroxide, Pyridine, and Glucose
  2. Sodium Hydroxide, Glycerine, and Glucose
  3. Pyridine, Glucose and Sodium Chloride
  4. Sodium Chloride, Glucose, and Sucrose

Answer and Explanation

15. The preliminary examination of blood can be done by:

(i) Phenolphthalein test (ii) Precepitin test (iii) Takayama Crystal test (iv) Luminal test

  1. (i) and (ii) are correct
  2. (i) and (iv) are correct
  3. (ii) and (iii) are correct
  4. (i), (ii) and (iii) are correct

Answer and Explanation

16. Arrange the following methods of blood examination in the decreasing order:

(i) Protein enzyme estimation (ii) Percipitin test (iii) Crystal test  (iv) DNA analysis

  1. (i) (ii) (iii) (iv)
  2. (ii) (i) (iv) (iii)
  3. (iii) (ii) (iv) (i)
  4. (iv) (i) (ii) (iii)

Answer and Explanation

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