This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 6 Molecular Basis Of Inheritance – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the function of tRNA A) To synthesize protein. B) To help in replication. C) A binding site for RNA polymerase. D) To carry amino acids to ribosome. Show Answer Correct Answer: D) To carry amino acids to ribosome. 2. Which of the following life processes is evolved around RNA? A) Metabolism. B) Translation. C) Splicing. D) All of these. Show Answer Correct Answer: B) Translation. 3. Give the sequence of bases AUG is transcribed from A) TAC. B) UAC. C) All the above. D) None of the above. Show Answer Correct Answer: A) TAC. 4. Anticodons are found in:- A) M RNA. B) T RNA. C) R RNA. D) In all. Show Answer Correct Answer: B) T RNA. 5. Bacteriophage lambda has how many base pairs A) 36000. B) 46390. C) 56398. D) 48502. Show Answer Correct Answer: D) 48502. 6. In E. colt, the lac operon gets switched on when A) Lactose is present and it binds to the repressor. B) Repressor binds to operator. C) RNA polymerase binds to the operator. D) Lactose is present and it binds to RNA polymerase. Show Answer Correct Answer: A) Lactose is present and it binds to the repressor. 7. ..... occurs in RNA instead of the nitrogenous base thymine found in DNA A) Uracil. B) Cytosine. C) Guanine. D) Adenine. Show Answer Correct Answer: A) Uracil. 8. The unequivocal proof that DNA is the genetic material came from the experiment which utilised- A) Streptococcus. B) T$_{2}$, E. coli. C) E. coli, heavy nitrogen. D) P$^{32}$, S$^{35}$, R-type bacteria. Show Answer Correct Answer: B) T$_{2}$, E. coli. 9. In eukaryotic genes, coding sequences are called A) Introns. B) Exons. C) Regulatory sequence. D) Repretitive DNA. Show Answer Correct Answer: B) Exons. 10. Which experimental technique did Meselson and Stahl use to prove semiconservative DNA replication? A) X-ray crystallography. B) Electron microscopy. C) Density gradient centrifugation. D) Gel electrophoresis. Show Answer Correct Answer: C) Density gradient centrifugation. 11. Who proposed the Central Dogma? A) Francis Crick. B) Frederick Griffith. C) Meselson and Stahl. D) James Watson. Show Answer Correct Answer: A) Francis Crick. 12. The amino acid that is incorporated at the start of protein synthesis in prokaryotes is: A) Methionine. B) Formyl methionine. C) Glycine. D) Alanine. Show Answer Correct Answer: B) Formyl methionine. 13. Guanine is bonded with Cytosine with how many hydrogen bonds A) Three. B) One. C) Two. D) None of the above. Show Answer Correct Answer: A) Three. 14. Mutations that change one base pair are A) Frame-shift. B) Point mutation. C) Chromosomal mutation. D) Polyploidy. Show Answer Correct Answer: B) Point mutation. 15. Select the correct term to complete:A mutation that changes the reading frame is a ..... mutation. A) Frame-shift. B) Point. C) Silent. D) Nonsense. Show Answer Correct Answer: A) Frame-shift. 16. Choose the correct sequence in which the following enzyme are used in DNA replication-I) Helicase II) Primase III) SSBPs IV) DNA polymerase v) DNA ligase A) I V IV III II. B) I II III IV V. C) I III II IV V. D) I IV III II I. Show Answer Correct Answer: C) I III II IV V. 17. Discountinuous synthesis of DNA occurs in one strand, because A) DNA molecule being synthesised is very long. B) DNA dependent DNA polymerase catalysed polymerisation only in one direction (5'-3' ). C) It is a more efficient process. D) DNA ligase joins the short stretches of DNA. Show Answer Correct Answer: B) DNA dependent DNA polymerase catalysed polymerisation only in one direction (5'-3' ). 18. In eukaryotes t-RNa is made up of which enzyme A) RNA polymerase. B) RNA polymerase I. C) RNA polymerase III. D) RNA polymerase II. Show Answer Correct Answer: C) RNA polymerase III. 19. Select the correct enzyme to complete:The enzyme responsible for transcription is ..... A) RNA polymerase. B) DNA polymerase. C) Reverse transcriptase. D) Ligase. Show Answer Correct Answer: A) RNA polymerase. 20. Which of these enzymes is not a part of DNA Replication? A) Helicase. B) Topoisomerase. C) Ligase. D) Hexokinase. Show Answer Correct Answer: D) Hexokinase. 21. What type of bond forms between the two strands of DNA? A) Polar Covalent. B) Hydrogen. C) Ionic. D) Phosphodiester. Show Answer Correct Answer: B) Hydrogen. 22. Monomers for the synthesis of DNA are called ..... A) Monosaccharides. B) Disaccharides. C) Nucleotides. D) Amino acids. Show Answer Correct Answer: C) Nucleotides. 23. Chargaff's rule states that A) DNA must be replicated before a cell can divide. B) Viruses enter cells without their protein coat. C) Only protein from the infecting phage can also be detected in progeny phage. D) The amount of cytosine equals the amount of guanine. Show Answer Correct Answer: D) The amount of cytosine equals the amount of guanine. 24. Which of the following facts did Hershey and Chase make use of in trying to determine whether DNA or protein is the genetic material? A) DNA contains purines, whereas protein includes pyrimidines. B) DNA contains nitrogen, whereas protein does not. C) DNA contains phosphorus, whereas protein does not. D) DNA contains sulfur, whereas protein does not. Show Answer Correct Answer: C) DNA contains phosphorus, whereas protein does not. 25. Which of the following has dual functions? A) AUG. B) ACU. C) AUC. D) AUU. Show Answer Correct Answer: A) AUG. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 1Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 2Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 3Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 4Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 5Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 6Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 7Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 8Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 9Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books