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1. As per the base-pairing rule, which of the following is correct?

  1. A-G
  2. C- T
  3. T- G
  4. G- C

Answer and Explanation

2. The complementary base pairs among four nucleotides (A, T, G, C) areas

  1. A ≡ G and T = C
  2. A = C and G ≡ T
  3. A = T and G ≡ C
  4. All of the above

Answer and Explanation

3. DNA is a(n):

  1. Ester                   
  2. Polymer            
  3. Enzyme             
  4. Protein

Answer

4. Ultraviolet rays are known to damage DNA on its exposure due to

  1. Breaking of bonds between G and C
  2. Formation of thymine-thymine dimers
  3. Formation of primer-dimer
  4. Extension of non-coding regions

Answer and Explanation

5. STR markers are presently preferred for forensic DNA analysis for the reasons given below, except

  1. It is abundant in the genome
  2. It is radioactive based
  3. It is highly amenable
  4. It is highly polymorphic

Answer

6. Different forms of the same gene or marker are called:

  1. Genetic linkage
  2. Linkage equilibrium
  3. Alleles
  4. Locus

Answer

7. Genes that exist as alternate expressions at a particular locus is known as

  1. Loci
  2. Antigen
  3. Allele
  4. Phenotype

Answer and Explanation

8. Structure of DNA, carrier of the genetic blueprint of all biological organisms has been reported by:

  1. Alec Jeffreys
  2. Muller
  3. Crick & Watson
  4. E.M. Southern

Answer and Explanation

9. Age of bloodstain can be determined by, except:

  1. Colour change
  2. DNA
  3. Globulin/Albumin ratio
  4. Protein patterns

Answer

10. The genetic markers are seen close together on the same chromosome exhibit:

  1. Genetic linkage
  2. Homozygosity
  3. Genetic concordance
  4. Independent segregation

Answer

11. Short fragments of DNA labeled with a radioactive tag are known as:

  1. Probes
  2. Primers
  3. STR’s
  4. SSR’s

Answer

12. DNA can be isolated from

  1. RBC
  2. WBC
  3. Seminal fluid
  4. Pure water

Answer

13. Which of the following cells are not useful for DNA analysis?

  1. Spermatozoa
  2. Vaignal cells
  3. Red blood cells
  4. Buccal mucosal cells

Answer

14. Which of the following is used in the PCR reaction mixture?

  1. Ca++                        
  2. Mg++                        
  3. Li++                             
  4. Na++

Answer and Explanation

15. The first technique that was adopted for forensic DNA analysis was:

  1. PCR 
  2. STR 
  3. RFLP
  4. HLA DQAI

Answer and Explanation

16. A change in one base of an amino acid sequence may produce a change, called:

  1. A Tetrad
  2. A zygote
  3. A point mutation
  4. Independent assortment

Answer and Explanation

17. The law of _____________ states that different segregating gene pairs behave independently due to recombination where genetic material is shuffled between generations.

  1. Probability
  2. Mendelian inheritance
  3. Independent assortment
  4. Segregation

Answer and Explanation

18. The ___________controls the movement of the chromosome during cell division.

  1. Centromere
  2. Telomere
  3. Chromatin
  4. Allele

Answer and Explanation

19. Two arms composed mainly of DNA and held together by centromere is a

  1. Chromosome
  2. Protein
  3. Cell
  4. Gene

Answer

20. Analysis of short tandem repeats is a kind of

  1. DNA test
  2. Psychometric test
  3. Respiratory test
  4. Physiological test

Answer and Explanation

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