This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 51 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 51 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The expressing sequences in mRNA are A) Exons. B) Euchromatin. C) Introns. D) Heteochromatin. Show Answer Correct Answer: A) Exons. 2. Transcription is the process that makes ..... from ..... A) RNA, RNA. B) RNA, DNA. C) DNA, DNA. D) DNA, RNA. Show Answer Correct Answer: B) RNA, DNA. 3. Process by which DNA makes RNA. A) Transcription. B) Replication. C) Translation. D) None of above. Show Answer Correct Answer: A) Transcription. 4. Which of these is part of the description of protein? A) A folded chain of amino acids. B) A folded chain of carbohydrates. C) A branched chain of fatty acids. D) A branched chain of nucleic acids. Show Answer Correct Answer: A) A folded chain of amino acids. 5. What are the products of photosynthesis? A) Water and carbon dioxide. B) Oxygen and glucose. C) Oxygen and carbon dioxide. D) Oxygen and water. Show Answer Correct Answer: B) Oxygen and glucose. 6. Anaerobic respiration..... A) Doesn't require CO2. B) Requires CO2. C) Doesn't require oxygen. D) Requires oxygen. Show Answer Correct Answer: C) Doesn't require oxygen. 7. Which scientist(s) determined that DNA replication was a semi-conservative process? A) Meselson & Stahl. B) Griffith. C) Hershey & Chase. D) Chargaff. Show Answer Correct Answer: A) Meselson & Stahl. 8. Which most directly controls the rate as which food is broken down to release energy? A) Enzymes. B) Hormones. C) Nucleic acids. D) Vitamins. Show Answer Correct Answer: A) Enzymes. 9. What is correct function for a carb? A) Build and repair body tissues. B) Body's main source of energy. C) Helps keep immune system functioning. D) Cushions organs. Show Answer Correct Answer: B) Body's main source of energy. 10. Short strands of --- primer are used in DNA replication. A) DNA. B) RNA. C) Histone. D) Protein. Show Answer Correct Answer: B) RNA. 11. What are the building blocks of all Carbohydrate? A) Glycerol. B) Amino acid. C) Fatty acid. D) Glucose. Show Answer Correct Answer: D) Glucose. 12. A strand of DNA has the following base sequence. ACG-GTA-AGC. What would be the complementary mRNA strand? A) TGC-CAT-TCG. B) ACG-GUA-AGC. C) UGC-CAU-UCG. D) ACG-GTA-AGC. Show Answer Correct Answer: C) UGC-CAU-UCG. 13. What is replicated by a semi-conservative process? A) Messenger RNA (mRNA) only. B) Messenger RNA (mRNA) and transfer RNA (tRNA) only. C) Messenger RNA (mRNA), transfer RNA (tRNA) and DNA only. D) DNA only. Show Answer Correct Answer: D) DNA only. 14. Which of the following is NOT a characteristic that prokaryotes and eukaryotes share? A) Cell membrane. B) DNA or RNA. C) Ribosomes. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 15. Which do DNA and RNA have in common? A) Both are double stranded. B) Both contain ribose molecules. C) Both contain phosphate groups. D) Both contain uracil. Show Answer Correct Answer: C) Both contain phosphate groups. 16. The enzyme that catalyses the first step of carbon fixation in photosynthesis A) Spider silk. B) Rhodopsin. C) Rubisco. D) Proteome. Show Answer Correct Answer: C) Rubisco. 17. The coming together of a substrate and the enzyme's active site is known as A) Collision. B) Activation energy. C) Denaturation. D) Increasing pH. Show Answer Correct Answer: A) Collision. 18. Transposons in bacteria usually carry additional gene for A) Plasmid resistance. B) DNA resistance. C) Antigen resistance. D) Antibiotic resistance. Show Answer Correct Answer: D) Antibiotic resistance. 19. An addition of two bases to a gene is called a A) Point mutation. B) Frameshift mutation. C) Deletion mutation. D) Silent mutation. Show Answer Correct Answer: B) Frameshift mutation. 20. When can a mutation be passed on to offspring? A) Only when the mutation is present during or occurs during mitosis. B) Only when the mutation is present during or occurs during meiosis. C) When the mutation occurs during mitosis or meiosis. D) When the mutation occurs in somatic cells. Show Answer Correct Answer: B) Only when the mutation is present during or occurs during meiosis. ← PreviousNext →Related QuizzesBiology QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books