Molecular Biology — MCQs Biology

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1. Molecular biology primarily deals with the study of:





2. The basic unit of genetic information is:





3. DNA stands for:





4. The structure of DNA was proposed by:





5. DNA is a polymer of repeating units called:





6. Each nucleotide of DNA consists of:





7. Which sugar is present in DNA?





8. Which nitrogenous base is found only in DNA?





9. Complementary base pairing in DNA involves:





10. Hydrogen bonds between A and T are:





11. Hydrogen bonds between G and C are:





12. DNA replication is:





13. The semiconservative nature of DNA replication was proven by:





14. DNA replication occurs during which phase of cell cycle?





15. The enzyme responsible for unwinding DNA is:





16. RNA primer is synthesized by:





17. The enzyme that joins Okazaki fragments is:





18. Okazaki fragments are formed on:





19. RNA differs from DNA by having:





20. The enzyme responsible for transcription is:





21. Transcription occurs in the:





22. The template strand in transcription is also called:





23. The process of protein synthesis is known as:





24. Translation takes place on:





25. A group of three nucleotides coding for one amino acid is called:





26. The start codon for protein synthesis is:





27. Which amino acid is coded by the start codon?





28. Stop codons include:





29. tRNA carries:





30. The anticodon is present on:





31. The genetic code is said to be universal because it:





32. One gene–one enzyme hypothesis was proposed by:





33. Exons are:





34. Introns are removed during:





35. Reverse transcription is the synthesis of:





36. The enzyme reverse transcriptase is found in:





37. Operon model was proposed by:





38. Lac operon is found in:





39. The regulatory gene in lac operon produces:





40. The inducer of lac operon is:





41. Mutation involving single base change is called:





42. Silent mutation does not affect:





43. A mutation that shifts the reading frame is known as:





44. Molecular cloning involves:





45. Restriction enzymes are also called:





46. Restriction enzymes cut DNA at:





47. Plasmids are commonly found in:





48. PCR stands for:





49. The enzyme used in PCR is:





50. Molecular biology techniques are widely used in:





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