This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 25 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is amplified using the polymerase chain reaction (PCR)? A) Large amounts of RNA. B) Small amounts of DNA. C) Small amounts of protein. D) Large amounts of polymers. Show Answer Correct Answer: B) Small amounts of DNA. 2. Molecules of DNA are composed of long chains of: A) Nucleotides. B) Monosaccharides. C) Amino acids. D) Fatty acids. Show Answer Correct Answer: A) Nucleotides. 3. What are the 2 functions of DNA polymerase? A) Makes DNA and RNA. B) Makes DNA and protein. C) Makes DNA and fixes its mistakes. D) Makes RNA and protein. Show Answer Correct Answer: C) Makes DNA and fixes its mistakes. 4. What role does transfer RNA have in translation? A) It repairs damaged DNA. B) It binds with an unzipped strand of DNA to copy DNA nucleotide sequences. C) It transports energy from the mitochondrion to the ribosome so that translation can take place. D) It carries amino acids to the ribosome. Show Answer Correct Answer: D) It carries amino acids to the ribosome. 5. Klenow fragment is derived from A) DNA polymerase I. B) Reverse transcriptase. C) RNA polymerase II. D) DNA ligase. Show Answer Correct Answer: A) DNA polymerase I. 6. The enzyme that catalyzes the synthesis of new DNA molecules is called A) DNA gyrase. B) DNA polymerase. C) DNA helicase. D) DNA ligase. Show Answer Correct Answer: B) DNA polymerase. 7. Who was credited with the discovery of the structure of DNA and was awarded a Nobel Prize? A) Rosalind Franklin. B) Erwin Chargaff, Watson, and Crick. C) Watson and Crick. D) Rosalind Franklin, Erwin Chargaff, Watson, and Crick. Show Answer Correct Answer: C) Watson and Crick. 8. Which of the following is a reason why it is significant that the two strands of DNA are antiparallel? A) The two strands of DNA run in opposite directions so that the bases can line up in the two strands and form hydrogen bonds between the A-T and C-G pairs. B) The two strands of DNA run in the same direction so that the bases can line up in the two strands and form hydrogen bonds between the A-T and C-G pairs. C) The two strands of DNA are antiparallel so that the sugar and phosphate groups can line up in the two strands and form covalent bonds between them. D) The two strands of DNA are antiparallel so that the bases can line up and form RNA from DNA. Show Answer Correct Answer: A) The two strands of DNA run in opposite directions so that the bases can line up in the two strands and form hydrogen bonds between the A-T and C-G pairs. 9. Which of the following researchers used radioactive markers in experiments to show that DNA was the genetic material in cells? A) Frederick Griffith. B) Oswald Avery. C) Alfred Hershey and Martha Chase. D) James Watson and Francis Crick. Show Answer Correct Answer: C) Alfred Hershey and Martha Chase. 10. Which enzyme fixes the Okazaki fragments in the lagging strand? A) Primerase. B) Polymerase. C) Ligase. D) Helicase. Show Answer Correct Answer: C) Ligase. 11. What is the condition that activate CAP? A) CAMP levels are low because glucose is absent. B) CAMP levels are high because glucose is absent. C) CAMP levels are low because glucose is present. D) CAMP levels are high because glucose is present. Show Answer Correct Answer: B) CAMP levels are high because glucose is absent. 12. A solution with a pH of 7 is..... A) Neutral. B) Decreasing. C) Apple juice. D) Increasing. Show Answer Correct Answer: A) Neutral. 13. Which of the following is an enzymatic protein that acts as DNA glue? A) Protein expression. B) Ligase. C) Plasmid. D) Restriction enzyme. Show Answer Correct Answer: B) Ligase. 14. Protein present in microfilament is A) Tubulin & myosin. B) Actin & myosin. C) Actin. D) Tubulin. Show Answer Correct Answer: B) Actin & myosin. 15. The function of tRNA is to A) Provide a place for protein synthesis. B) Transport amino acids to the ribosome. C) Travel to the ribosome to direct protein synthesis. D) None of these is correct. Show Answer Correct Answer: B) Transport amino acids to the ribosome. 16. Which process is used to copy DNA in the nucleus? A) Replication. B) Transcription. C) Translation. D) None of above. Show Answer Correct Answer: A) Replication. 17. Which statement best distinguishes aerobic from anaerobic respiration? A) Only aerobic respiration involves fermentation. B) Only aerobic respiration requires oxygen. C) Only anaerobic respiration occurs in the mitochondria. D) Only anaerobic respiration produces carbon dioxide. Show Answer Correct Answer: B) Only aerobic respiration requires oxygen. 18. Which of the following are involved in both replication and transcription? A) DNA only. B) DNA and RNA. C) DNA and ribosomes. D) DNA, RNA and ribosomes. Show Answer Correct Answer: B) DNA and RNA. 19. What type of mutation is responsible for Down Syndrome? A) Translocation during meiosis. B) Substitution during mitosis. C) Nondisjunction during meiosis. D) Frameshift mutation during mitosis. Show Answer Correct Answer: C) Nondisjunction during meiosis. 20. Which one is NOT a vegetable? A) Carrots. B) Tomato. C) Lettuce. D) Ice cream. Show Answer Correct Answer: D) Ice cream. 21. Hydrogen bonding between water molecules is important in living systems becauseI It makes water cohesiveII It gives water a high specific heat capacityIII It makes water transparentIV It helps water to be a good solvent for polar molecules A) I and III only. B) II and IV only. C) I and II only. D) I, II and IV only. Show Answer Correct Answer: D) I, II and IV only. 22. Which is the final product of meiosis? A) Four cells, each with the same number of chomosomes as the parent cell. B) Two cells, each with the same number of chomosomes as the parent cell. C) Four cells, each with half as many chomosomes as the parent cell. D) Two cute babies named Juan and Chris. Show Answer Correct Answer: C) Four cells, each with half as many chomosomes as the parent cell. 23. The method of DNA replication, where each original strand is used as a template to build a new strand is called the A) Disruptive method. B) Semiconservative method. C) Continuous method. D) Conservative method. Show Answer Correct Answer: B) Semiconservative method. 24. What is the complementary base pair to Cytosine in DNA? A) Cytosine. B) Guanine. C) Thymine. D) Uracil. Show Answer Correct Answer: B) Guanine. 25. Transcribe ATC CAT GGC CTA A) UAG GUA CCG GAT. B) UAG GUA CCG GAU. C) ATC CAT GGC CTA. D) TAG GTA CCG GAT. Show Answer Correct Answer: B) UAG GUA CCG GAU. 26. Which type of molecule do whales use for energy storage and insulation? A) DNA. B) Glucose. C) Fat. D) Starch. Show Answer Correct Answer: C) Fat. 27. What is the name for when DNA makes another copy of itself? A) Duplication. B) Translation. C) Transcription. D) Replication. Show Answer Correct Answer: D) Replication. 28. Which of the following units are repeatedly joined together to form a strand of DNA? A) Nucleotides. B) Fatty acids. C) Polysaccharides. D) Amino acids. Show Answer Correct Answer: A) Nucleotides. 29. Fats that provide long term energy storage A) Saturated fatty acid. B) Glycogen. C) Lipids. D) Glucose. Show Answer Correct Answer: C) Lipids. 30. Which of the following is/are true of photosynthesis?I. Photolysis of CO2 provides electronsII. Electrons are needed to convert CO2 into glucoseIII. It is only carried out by plants A) I only. B) II only. C) I and II only. D) I, II and III. Show Answer Correct Answer: B) II only. ← 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