This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 30 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the function of an anticodon? A) Anticodons in tRNA form bonds with the complimentary codons in mRNA. This allows tRNA to add its amino acid to the polypeptide chain. B) It is a three-base code that specifies a particular amino acid on the mRNA. C) It is the part of the mRNA that is cut out when making a functioning protein. D) It is an enzyme that corrects a mutation of the codons on the DNA. Show Answer Correct Answer: A) Anticodons in tRNA form bonds with the complimentary codons in mRNA. This allows tRNA to add its amino acid to the polypeptide chain. 2. Which property of water accounts for its moderating effects on the Earth's atmosphere? A) Cohesive. B) Thermal. C) Transparency. D) Adhesive. Show Answer Correct Answer: B) Thermal. 3. What are the building blocks of proteins call? A) DNA. B) Amino Acids. C) RNA. D) Ribosomes. Show Answer Correct Answer: B) Amino Acids. 4. What is the name for a sequence of DNA bases? A) Gene. B) TRNA. C) One-gene, one-protein. D) MRNA. Show Answer Correct Answer: A) Gene. 5. What are the REACTANTS for cellular respiration? A) Oxygen and carbon dioxide. B) Water and glucose. C) Carbon dioxide and water. D) Glucose and oxygen. Show Answer Correct Answer: D) Glucose and oxygen. 6. Water is made up of two hydrogen atoms joined by ..... bonds to an oxygen atom. A) Covalent. B) Ionic. C) Hydrogen. D) None of above. Show Answer Correct Answer: A) Covalent. 7. Where is mRNA made? A) Cytoplasm. B) Ribosome. C) Mitochondria. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 8. In eukaryotes protein synthesis happens in A) Cytoplasm. B) Nucleus. C) Cytoplasm and nucleus. D) None. Show Answer Correct Answer: C) Cytoplasm and nucleus. 9. HISTORY: Performed an experiment with Bacteriophage viruses that proved DNA was the genetic material A) Maurice Wilkens and Rosalind Franklin. B) James Watson and Francis Crick. C) Alfred Hershey and Martha Chase. D) Peanut butter and Jelly. Show Answer Correct Answer: C) Alfred Hershey and Martha Chase. 10. What is the DNA sequence or part of the gene called where transcription factors bind and signal the start of transcription. A) Initiation. B) Promoter. C) Terminator. D) Start codon. Show Answer Correct Answer: B) Promoter. 11. Which choice describes a chromosome in a prokaryotic cell? A) Linear in the cytoplasm. B) Circular in the nucleus. C) Linear in the nucleus. D) Circular in the cytoplasm. Show Answer Correct Answer: D) Circular in the cytoplasm. 12. What type of macro-molecules are DNA and RNA? A) Protein. B) Carbohydrate. C) Lipid. D) Nucleic Acid. Show Answer Correct Answer: D) Nucleic Acid. 13. Where does transcription take place? A) Nucleus. B) Cytoplasm. C) Ribosome. D) Smooth ER. Show Answer Correct Answer: A) Nucleus. 14. Process that converts radiant energy to chemical energy..... A) Hypothesis. B) Photosynthesis. C) Autotroph. D) Heterotroph. Show Answer Correct Answer: B) Photosynthesis. 15. In eukaryotes, nearly all the DNA is found in the A) Histones. B) Ribosomes. C) Nucleus. D) Cytoplasm. Show Answer Correct Answer: C) Nucleus. 16. How do food and nutrients like vitamins, along with exercise, affect thehuman body? A) They help people maintain their health. B) They prevent people from ever getting sick. C) They make a person much smarter. D) They stop a person from ever getting tired. Show Answer Correct Answer: A) They help people maintain their health. 17. Which of the following are proteins?I CollagenII GlycogenIII InsulinIV Immunoglobulins A) I and III only. B) I, III and IV only. C) I and II only. D) All of the above. Show Answer Correct Answer: B) I, III and IV only. 18. A mutation in which only one nucleotide is altered is called a: A) Frameshift Mutation. B) Deletion Mutation. C) Insertion Mutation. D) Point Mutation. Show Answer Correct Answer: D) Point Mutation. 19. Scientists who first determined that DNA is the genetic material were led by A) Francis Crick. B) Erwin Chargaff. C) James Watson. D) Oswald Avery. Show Answer Correct Answer: D) Oswald Avery. 20. In gel electrophoresis the ..... charge is close to the wells and the ..... charge is on the opposite end because phosphates are ..... A) Positive, positive, negative. B) Positive, negative, positive. C) Negative, positive, negative. D) Positive, negative, negative. Show Answer Correct Answer: D) Positive, negative, negative. 21. Which of the following correctly represents the pathway taken by the genetic code during protein synthesis? A) DNA-tRNA-ribosome-mRNA-protein. B) DNA-tRNA-chromosome-mRNA-protein. C) DNA-mRNA-ribosome-tRNA-protein. D) DNA-mRNA-chromosome-tRNA-protein. Show Answer Correct Answer: C) DNA-mRNA-ribosome-tRNA-protein. 22. Using a virus to enter a cell and replace defective genes with healthy genes is called A) Bioremediation. B) Cloning. C) Gene therapy. D) Tissue culturing. Show Answer Correct Answer: C) Gene therapy. 23. What bio molecule do mutations first manifest themselves in? A) DNA. B) MRNA. C) Proteins. D) It could be any of these. Show Answer Correct Answer: A) DNA. 24. Experiment that radioactively labeled the proteins and DNA of bacteriophages to determine if DNA or protein was the transforming agent A) Messelson & Stahl. B) Watson & Crick. C) Hershey & Chase. D) Avery. Show Answer Correct Answer: C) Hershey & Chase. 25. Before cells can divide, what must be copied? A) Mitochondria. B) Cytoplasm. C) DNA. D) Cell Wall. Show Answer Correct Answer: C) DNA. 26. Between which atoms do hydrogen bonds form in water? A) Oxygen and hydrogen atoms in the same water molecule. B) Oxygen and hydrogen atoms in different water molecules. C) Hydrogen atoms in the same water molecule. D) Oxygen atoms of different water molecules. Show Answer Correct Answer: B) Oxygen and hydrogen atoms in different water molecules. 27. The enzyme that creates m-RNA A) RNA polymerase. B) Helicase. C) DNA polymerase. D) RNA primase. Show Answer Correct Answer: A) RNA polymerase. 28. The process by which one strain of bacterium is apparently changed into another strain is called A) Transcription. B) Replication. C) Transformation. D) Duplication. Show Answer Correct Answer: C) Transformation. 29. Assembles RNA during transcription A) Gene Expression. B) Mutations. C) Point Mutation. D) RNA Polymerase. Show Answer Correct Answer: D) RNA Polymerase. 30. Which is likely to occur if an individual consumes an abundance of carbohydrates but remains very inactive? A) Blood glucose and energy levels are both decreased. B) Less energy is produced, causing fatigue. C) Blood glucose levels increase, and appetite decreases. D) Extra glucose is stored as body fat, causing weight gain. Show Answer Correct Answer: D) Extra glucose is stored as body fat, causing weight gain. ← PreviousNext →Related QuizzesBiology QuizzesAgriculture QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books