This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 6 Molecular Basis Of Inheritance – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. UTRs are the untranslated regions present on A) RRNA. B) HnRNA. C) MRNA. D) /RNA. Show Answer Correct Answer: C) MRNA. 2. Which was the first catalytic molecule during evolution of life? A) DNA. B) RRNA. C) TRNA. D) MRNA. Show Answer Correct Answer: B) RRNA. 3. A mutation always results in harmful effects. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 4. Okazaki fragments are synthesised on:- A) Leading strands of DNA only. B) Lagging strands of DNA only. C) Both leading and lagging strands of DNA. D) Complementary DNA. Show Answer Correct Answer: B) Lagging strands of DNA only. 5. More than one initiation codon and termination codons are found in which RNA A) Prokaryotic m-RNA. B) Eukaryotic m-RNA. C) Hetero nuclear RNA. D) Ribosomal RNA. Show Answer Correct Answer: A) Prokaryotic m-RNA. 6. Removal of introns and joining of exons in a defined order in a transcription unit is called A) Tailing. B) Transformation. C) Capping. D) Splicing. Show Answer Correct Answer: D) Splicing. 7. Transcription and translation of a gene composed of 30 nucleotides would form a protein containing no more than ..... amino acids. A) 10. B) 15. C) 60. D) 90. Show Answer Correct Answer: A) 10. 8. Select the correct term to complete:A segment of DNA used to make rRNA is called ..... A) RDNA. B) CDNA. C) MtDNA. D) SsDNA. Show Answer Correct Answer: A) RDNA. 9. Transformation experiment were done by A) Tautum. B) Zinder. C) Lederberg. D) Griffith. Show Answer Correct Answer: D) Griffith. 10. Boiling DNA causes it to become A) Single stranded. B) Monomers. C) Destroyed. D) Smaller the longer it is boiled. Show Answer Correct Answer: A) Single stranded. 11. What 3 models were suggested to show how the double helix separates during replication? A) Conservative, semi-conservative, and non-conservative. B) Conservative, semi-dispersive, and dispersive. C) Conservative, semi-conservative, and dispersive. D) Conversive, semi-conservative, and displaced. Show Answer Correct Answer: C) Conservative, semi-conservative, and dispersive. 12. Process used for amplication or multiplication of DNA for finger printing is A) Polymerase chain reaction. B) Nesslerisation. C) Southern blotting. D) Northern blotting. Show Answer Correct Answer: A) Polymerase chain reaction. 13. Codons are read in A) 2' $\rightarrow$ 3' direction. B) 3' $\rightarrow$ 5' direction. C) 5' $\rightarrow$ 3' direction. D) Random. Show Answer Correct Answer: C) 5' $\rightarrow$ 3' direction. 14. If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it? A) 20%. B) 40%. C) 30%. D) 60%. Show Answer Correct Answer: C) 30%. 15. What breaks the hydrogen bonds A) Helicase. B) Polymerase. C) Topoisomerase. D) Ligase. Show Answer Correct Answer: A) Helicase. 16. What is the function of missence strand of DNA? A) Coding strand. B) Template strand. C) All the above. D) None of the above. Show Answer Correct Answer: B) Template strand. 17. Which of the following statements is true regarding introns? A) Introns are the parts of mRNA that are translated. B) Introns have no function. C) In general, human genes have fewer introns than genes of other organisms. D) Introns may be involved in exon shuffling. Show Answer Correct Answer: D) Introns may be involved in exon shuffling. 18. To initiate translation, the tRNA first binds to: A) The whole ribosome. B) The smaller ribosomal sub-unit. C) No such specificity exists. D) The larger ribosomal sub-unit. Show Answer Correct Answer: B) The smaller ribosomal sub-unit. 19. The length of the DNA is usually defined as the number of ..... A) Nucleosides. B) Nucleotides. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nucleotides. 20. Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine? A) 58%. B) 8%. C) 42%. D) 16%. Show Answer Correct Answer: B) 8%. 21. Prokaryotes exhibit A) Monocistronic. B) Polycistronic. C) Monosomic. D) Polymorphic. Show Answer Correct Answer: B) Polycistronic. 22. DNA ligase adds nucleotides to growing DNA chain. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. During the replication of DNA, ..... A) The reaction is catalyzed by RNA polymerase. B) The cell undergoes mitosis. C) Both strands of a molecule act as templates. D) Errors never occur. Show Answer Correct Answer: C) Both strands of a molecule act as templates. 24. During expression of an operon, RNA polymerase binds to A) Structural gene. B) Regulator gene. C) Operator. D) Promoter. Show Answer Correct Answer: D) Promoter. 25. Name the RNA involved in structural and catalytic function during translation A) MRNA. B) RRNA. C) TRNA. D) RNAi. Show Answer Correct Answer: B) RRNA. ← 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