This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 6 Molecular Basis Of Inheritance – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Removal of RNA polymerase III from nucleoplasm will affect the synthesis of: A) T RNA. B) Hn RNA. C) M RNA. D) R RNA. Show Answer Correct Answer: A) T RNA. 2. Which one among the following was the first genetic material? A) DNA. B) RNA. C) Protein. D) Nuclein. Show Answer Correct Answer: B) RNA. 3. Which of the following can synthesize all types of RNA A) R-RNA. B) T-RNA. C) M-RNA. D) DNA. Show Answer Correct Answer: D) DNA. 4. Ead the following and select the correct statement/statements. (a) 23 s RNA act as a enzyme in prokaryotes. (b) In prokaryotes DNA is monocistronic (c) Francis Crick proposed the Central Dogma of Molecular biology. (d) In Eukaryotes three types of RNA polymerases are present. A) Only a. B) A nd b. C) A and c. D) A and d. Show Answer Correct Answer: D) A and d. 5. Which of the following steps in transcription is catalysed by RNA polymerase? A) Initiation. B) Elongation. C) Termination. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. Euchromatin is A) Transcriptionally active. B) Transcriptionally inactive. C) Densely packed. D) Heterochromatin. Show Answer Correct Answer: A) Transcriptionally active. 7. Synthesis of DNA from RNA template occurs in A) Reovirus. B) Rous sarcoma virus. C) T$_{2}$. D) TMV. Show Answer Correct Answer: B) Rous sarcoma virus. 8. In the process of transcription in Eukaryotes, the RNA polymerase I transcribes A) Precursor of mRNA, hnRNA. B) MRNA with additional processing, capping and tailing. C) TRNA, 5 srRNA and snRNAs. D) RRNAs-28 S, 18 S and 5.8 S. Show Answer Correct Answer: D) RRNAs-28 S, 18 S and 5.8 S. 9. According to HGP, genetic similarity between all human is A) 90%. B) 95%. C) 99.9%. D) 99.5%. Show Answer Correct Answer: C) 99.9%. 10. If DNA Polymerase is reading the following sequence:3'-AATCGC-5' what will the enzyme add to the growing DNA strand? A) 5'-GCGATT-3'. B) 5'-TTAGCG-3'. C) 5'-AATCGC-3'. D) 3'-AATCGC-5'. Show Answer Correct Answer: B) 5'-TTAGCG-3'. 11. GenomicDNAis ..... resultingintheproductionof ..... A) Transcribed, DNA. B) Transcribed, mRNA. C) Translated, protein. D) Replicated, mRNA. Show Answer Correct Answer: B) Transcribed, mRNA. 12. Which one of the following is the starter codon? A) AUG. B) UGA. C) UAA. D) UAG. Show Answer Correct Answer: A) AUG. 13. RNA that picks up specific amino acid from amino acid pool of cytoplasm to carry it to ribosome during protein synthesis is A) MRNA. B) TRNA. C) RRNA. D) GRNA. Show Answer Correct Answer: B) TRNA. 14. Which of the following is the function of the poly-A tail? A) To protect mRNA from hydrolytic enzymes. B) To allow for exit from nucleus. C) To signal for termination of translation. D) To decrease the length of mRNA molecules. Show Answer Correct Answer: A) To protect mRNA from hydrolytic enzymes. 15. Under which of the following conditions there will be no change in the reading frame of the following mRNA?5' AACAGCGGUGCUAUU 3' A) Insertion of G at 5th position. B) Deletion of G from 5th position. C) Insertion of A and G at 4th and 5th position respectively. D) Deletion of GGU from 7th 8th and 9th positions. Show Answer Correct Answer: D) Deletion of GGU from 7th 8th and 9th positions. 16. RNA polymerase II synthesizes mRNA in eukaryotes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. DNA replication runs from ..... ' to ..... ' and is said to be ..... A) 5, 3, antiparallel. B) 3, 5, antiparallel. C) 5, 3, parallel. D) 3, 5, parallel. Show Answer Correct Answer: A) 5, 3, antiparallel. 18. The 3' end of a DNA strand is defined as the place where A) The phosphate group is not bound to another nucleotide. B) Both DNA strands end opposite each other. C) DNA polymerase binds to begin replication. D) There is a free-OH group at the 3' carbon of deoxyribose. Show Answer Correct Answer: D) There is a free-OH group at the 3' carbon of deoxyribose. 19. Which of the following is not required in translation A) UTRs. B) Ribosome. C) AUG. D) Sigma factor. Show Answer Correct Answer: D) Sigma factor. 20. Read the given statements and select the correct option.Statement I:Prokaryotes have single origin of replication in their genome.Statement II:QB bacteriophage has RNA as their genetic material. A) Only statement I is incorrect. B) Only statement II is incorrect. C) Both statement I and II are correct. D) Both statement I and II are incorrect. Show Answer Correct Answer: C) Both statement I and II are correct. 21. The most abundant RNA of cell is:- A) R-RNA. B) T-RNA. C) M-RNA. D) None of these. Show Answer Correct Answer: A) R-RNA. 22. What is the function of DNA ligase enzyme A) Help join the fragments of DNA. B) Responsible for polymerization activity. C) Helps in unwinding of DNA duplex. D) Converts a positive supercoil to a negative supercoil,. Show Answer Correct Answer: A) Help join the fragments of DNA. 23. First experimental proof for semi conservative DNA replication was shown in A) Streptococcus pneumoniae. B) Escherichia coli. C) Neurospora chrasa. D) Rattus rattus. Show Answer Correct Answer: B) Escherichia coli. 24. Bacteriophage nucleic acids were labelled by carrying out an infection of E. coli cells growing in A) $^{ 14}$C-labeled CO$_{2}$. B) $^{3}$H-labeled water. C) $^{32}$P-labeled phosphate. D) $^{35}$S-labeled sulfate. Show Answer Correct Answer: C) $^{32}$P-labeled phosphate. 25. What is the coding part of DNA A) Exon. B) Intron. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exon. ← 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