Biology MCQ – MCQ on Molecular Biology
1. Peptide linkages are formed in between
- Nucleotides
- Amino acids
- Glucose molecules
- Sucrose
[expand title=”Show Answer”]Answer: b
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2. The nucleic acid of polio viruses is
- DNA
- RNA – (+) type
- t-RNA
- m-RNA
[expand title=”Show Answer”]Answer: b
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3. Rabies virus is
- Nake RNA virus
- Naked DNA virus
- Enveloped RNA virus
- Enveloped DNA virus
[expand title=”Show Answer”]Answer: c
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4. Example for DNA virus
- Polio virus
- Adeno virus
- Echo virus
- Poty virus
[expand title=”Show Answer”]Answer: b
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5. In genetic engineering breaks in DNA are formed by enzymes known as
- Restriction enzymes
- Ligases
- Nucleases
- Hydralases
[expand title=”Show Answer”]Answer: b
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6. DNA transfer from one bacterium to another through phages is termed as
- Transduction
- Induction
- Transfection
- Infection
[expand title=”Show Answer”]Answer: a
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7. Microorganisms usually make acetyl CO-A by oxidizing
- Acetic acid
- Pyruvic acid
- α-ketoglutaric acid
- Fumaric acid
[expand title=”Show Answer”]Answer: a
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8. The method of DNA replication proposed by Watson and Crick is
- Semi conservative
- Conservative
- Dispersive
- Rolling loop
[expand title=”Show Answer”]Answer: a
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9. The distance between each turn in the helical strand of DNA is
- 20 Ao
- 34 Ao
- 28 Ao
- 42 A0
[expand title=”Show Answer”]Answer: b
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10. Self-replicating, small circular DNA molecules present in bacterial cell are known
- Plasmids
- Cosmids
- Plasmomeros
- plastides
[expand title=”Show Answer”]Answer: a
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11. Western blotting is the technique used in the determination of
- RNA
- DNA
- Proteins
- All of these
[expand title=”Show Answer”]Answer: b
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12. m RNA synthesis from DNA is termed
- Transcription
- Transformation
- Translation
- Replication
[expand title=”Show Answer”]Answer: a
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13. Western blotting is a technique used in the determination of
- DNA
- RNA
- Protein
- Polysaccharides
[expand title=”Show Answer”]Answer: a
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14. Building blocks of Nucleic acids are
- Amino acids
- Nucleosides
- Nucleotides
- Nucleo proteins
[expand title=”Show Answer”]Answer: c
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15. DNA finger printing is based on
- Repetitive sequences
- Unique sequences
- Amplified sequences
- Non-coding sequences
[expand title=”Show Answer”]Answer: b
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16. The enzyme required for DNA from RNA template:
- RNA polymerase
- Reverse transcriptase
- DNA polymerase
- Terminal transferase
[expand title=”Show Answer”]Answer: b
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17. Double standard RNA is seen in
- Reo virus
- Rhabdo virus
- Parvo virus
- Retro virus
[expand title=”Show Answer”]Answer: a
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18. Example for DNA viruses:
- Adeno virus
- Bacteriophage T1, T2, T3, T4, T5, T6
- Papova virus
- Herpes virus and cauliflower moisaic
- All of the above
[expand title=”Show Answer”]Answer: e
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19. The following are the RNA viruses, except
- Reo viruses
- Retro viruses
- Bacteriophage Φ C
- Tmv and Bacteriophages Ms2, F2
- Dahila mosaic virus and Bacteriophages Φ× 174, M12, M13
[expand title=”Show Answer”]Answer: e
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20. The two strands of DNA are joined noncovalently by
- Ionic bonds
- Covalent bonds
- Hydrogen bonds between bases
- Polar charges
[expand title=”Show Answer”]Answer: c
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21. The bases Adenine and Thymine are paired with
- Double hydrogen bonds
- Single hydrogen bonds
- Triple hydrogen bonds
- Both b and c
[expand title=”Show Answer”]Answer: a
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22. The no. of hydrogen bonds existing between Guanine and Cytosine are
- 5
- 2
- 3
- None of these
[expand title=”Show Answer”]Answer: c
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23. The length of each coil in DNA strand is
- 15 Ao
- 34 Ao
- 30 Ao
- 5 Ao
[expand title=”Show Answer”]Answer: b
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24. Nucleic ac ids are highly charged polymers due to
- There is phosphodiester bond between 5’-hydroxyl of one ribose and 3’–hydroxyl of next ribose
- They have positive and negative ends
- Nucleotides are charged structures
- Nitrogenous bases are highly ionized compounds
[expand title=”Show Answer”]Answer: a
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25. The best studied example for specialized transduction is
- P1 phage
- P22 phage
- ë-phage
- Both a and c
[expand title=”Show Answer”]Answer: c
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26. The diagrammatic representation of the total no. of genes in DNA is
- Genome
- Gene map
- Gene-structure
- Chromatin
[expand title=”Show Answer”]Answer: b
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27. During specialized transduction
- Large amound of DNA is transferred
- A few no. of genes are transferred
- Whole DNA is transferred
- None of these
[expand title=”Show Answer”]Answer: b
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28. The cell donating DNA during transformation is
- Endogenate
- Exogenate
- Mesozygote
- Merosite
[expand title=”Show Answer”]Answer: b
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29. Genetic information transfer DNA to RNA is called –
- Transcriptase
- Transduction
- Transformation
- Recombination
[expand title=”Show Answer”]Answer: a
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30. The gene transfer occurs by –
- Transformation
- Transduction
- Conjugation
- Cell fusion
[expand title=”Show Answer”]Answer: a
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