This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 6 Molecular Basis Of Inheritance – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. You share the exact same DNA as your family members. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. In Prokaryotes RNA polymerase is of how many types A) 3. B) 2. C) 4. D) None of these. Show Answer Correct Answer: D) None of these. 3. Choose the option with all correct statements-I) RNA polymerase I transcribes 28 S, 18S, 5.8 S rRNAII) RNA polymerase III transcribes 5S rRNA & t RNAIII) RNA polymerase II transcribes hn RNAIV) in prokaryotes different RNA polymerase transcribes mRNA, t RNA & r RNA A) II, III & IV are correct. B) I, II & III. C) I, IV & III. D) III & IV. Show Answer Correct Answer: B) I, II & III. 4. The equivalent of a structural gene is: A) Operon. B) Recon. C) Muton. D) Cistron. Show Answer Correct Answer: D) Cistron. 5. Histone proteins are rich in A) Glutamic acid. B) Lysine. C) Arginine. D) Both b and c. Show Answer Correct Answer: D) Both b and c. 6. The double helical structure of DNA was discovered in ..... A) 1958. B) 1954. C) 1953. D) 1928. Show Answer Correct Answer: C) 1953. 7. Nuclease A) A type of carbohydrate found in nucleic acids. B) An enzyme that synthesizes nucleic acids. C) A protein that stabilizes nucleic acids. D) A DNA cutting enzyme. Show Answer Correct Answer: D) A DNA cutting enzyme. 8. Which RNA bases would pair with TAC in transcription? A) AUG. B) ATG. C) GCA. D) GCA. Show Answer Correct Answer: A) AUG. 9. This enzyme is responsible for creating telomeres added to the ends of DNA A) Topoisomerase. B) Telomerase. C) DNA Helicase. D) DNA PrimaseTagsDNA replication enzymes. Show Answer Correct Answer: B) Telomerase. 10. All amino acids are coded by only one codon. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. Which of the following amino acid is coded by a single codon? A) Lysine. B) Arginine. C) Tryptophan. D) Phenylalanine. Show Answer Correct Answer: C) Tryptophan. 12. What does "lac" refer to in what we call the lack Oberon? A) The number 1, 00, 000. B) Lactose. C) Lactase. D) Lac insect. Show Answer Correct Answer: B) Lactose. 13. The T phage is structurally made up of A) RNA and protein. B) DNA and RNA. C) DNA and protein. D) DNA and carbohydrate. Show Answer Correct Answer: C) DNA and protein. 14. The tryptophan operon is a repressible operon that is ..... ? ..... A) Turned on only when glucose is present in the growth medium. B) Turned off whenever tryptophan is added to the growth medium. C) Turned off only when glucose is present in the growth medium. D) Permanently turned on. Show Answer Correct Answer: B) Turned off whenever tryptophan is added to the growth medium. 15. Sickle cell anemia is caused A) When valine is replaced by glutamic acid in alpha polypeptide chain. B) When glutamic acid is replaced by valine in alpha polypeptide chain. C) When glutamic acid is replaced by valine in beta polypeptide chain. D) When valine is replaced by glutamic acid in beta polypeptide chain. Show Answer Correct Answer: C) When glutamic acid is replaced by valine in beta polypeptide chain. 16. Which of the following characteristics would you expect of a eukaryotic organism that lacks the enzyme telomerase? A) An inability to repair thymine dimers. B) A reduction in chromosome length in gametes. C) A high probability of somatic cells becoming cancerous. D) An inability to produce Okazaki fragments. Show Answer Correct Answer: B) A reduction in chromosome length in gametes. 17. How many codons code for amino acids? A) 60. B) 61. C) 63. D) 64. Show Answer Correct Answer: B) 61. 18. The nucleosome structure of eukaryotic chromatin is due to all of the following histones, except A) H1. B) H2A. C) H2B. D) H3. Show Answer Correct Answer: A) H1. 19. During post transcriptional processing, splicing involves A) Removal of introns and joining of exons. B) Formation of hnRNA. C) Addition of 200-300 adenylate residues at 3' end of hnRNA. D) All of the above. Show Answer Correct Answer: A) Removal of introns and joining of exons. 20. If one strand of DNA has the nitrogenous base sequence at ATCTG, what would be the complementary RNA strand sequence A) TTAGU. B) UAGAC. C) AACTG. D) ATCGU. Show Answer Correct Answer: B) UAGAC. 21. The RNA polymerase that transcribes 18S and 28S rRNA in eukaryotes is: A) RNA polymerase I. B) RNA polymerase II. C) RNA polymerase III. D) RNA polymerase IV. Show Answer Correct Answer: A) RNA polymerase I. 22. In the Hershey-Chase experiment A) DNA from parent bacteriophage appeared in progeny bacteriophages. B) Most of the phage DNA never entered the bacteria. C) More than three-fourths of the phage protein appeared in progeny phages. D) DNA was labeled with radioactive sulfur. Show Answer Correct Answer: A) DNA from parent bacteriophage appeared in progeny bacteriophages. 23. Which of the following methodology is used to identify all the genes that are expressed as RNA in Human Genome Project (HGP)? A) Sequence Annotation. B) Expressed Sequence Tags. C) Karyotyping. D) Ammonification. Show Answer Correct Answer: B) Expressed Sequence Tags. 24. DNA polymerase-******A. Is the main enzyme for RNA synthesis******B. Is DNA dependent DNA polymerising enzyme******C. Is highly efficient enzyme******D. It catalyses reaction with high degree of accuracy A) C, D. B) A, B, C, D. C) B, C, D. D) A, B, C. Show Answer Correct Answer: C) B, C, D. 25. The error rate of changing an incorrect base with another incorrect base during proofreading is A) 1 in 10 bases. B) 1 in 100 bases. C) 1 in 1000 bases. D) 1 in 10, 000 bases. Show Answer Correct Answer: D) 1 in 10, 000 bases. ← 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