This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 3 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. At room temperature, water is a liquid and methane is a gas. Which molecular property explains this difference? A) Higher molecular mass of water. B) Dipolarity of water. C) Presence of more hydrogen in methane. D) Higher boiling point than methan. Show Answer Correct Answer: B) Dipolarity of water. 2. Amino acids are the building blocks of A) Fats. B) Minerals. C) Carbohydrates. D) Protein. Show Answer Correct Answer: D) Protein. 3. How many nitrogen bases would code for a polypeptidethat is 30 amino acids long? A) 30. B) 60. C) 90. D) 10. Show Answer Correct Answer: C) 90. 4. Which of these is in order from largest to smallest. A) Chromosome, nucleus, cell, DNA, nucleotide. B) Nucleotide, DNA, chromosome, nucleus, cell. C) Cell, nucleus, chromosome, DNA, nucleotide. D) Cell, nucleotide, DNA, chromosome, nucleus. Show Answer Correct Answer: C) Cell, nucleus, chromosome, DNA, nucleotide. 5. Which enzyme help in the synthesis of ATP A) Enolase. B) ATP Synthase. C) Hexokinase. D) None of above. Show Answer Correct Answer: B) ATP Synthase. 6. If a section of a gene with the base sequence ATTGC is transcribed, what is the sequence of the RNA made? A) UAACG. B) AUUGC. C) UUUGC. D) TAACG. Show Answer Correct Answer: A) UAACG. 7. Which molecule provided by plants accounts for the energy in an animal's diet? A) Glucose. B) Protein. C) Salt. D) Oxygen. Show Answer Correct Answer: A) Glucose. 8. What is the amino acid code for start codon? A) Phe. B) Met. C) Leu. D) Ile. Show Answer Correct Answer: B) Met. 9. Why do we sweat? When water evaporates, it ..... a lot of energy from the system due to the fact that it has a high latent heat of evaporation. This is felt as a ..... sensation. A) Removes, cooling. B) Removes, heating. C) Adds, cooling. D) Adds, heating. Show Answer Correct Answer: A) Removes, cooling. 10. James exercises for 30 minutes per day, five days a week. This moderate exercise program most likely provides which benefit? A) Loss of bone and muscle strength. B) Improvement in overall health. C) Increased blood pressure. D) Decreased energy levels. Show Answer Correct Answer: B) Improvement in overall health. 11. The shape of ribose is A) Square. B) Pentagon. C) Hexagon. D) Octagon. Show Answer Correct Answer: B) Pentagon. 12. Which is necessary for a plant to convert the energy of the sun into energy it can use? A) Calcium chloride. B) Chlorophyll. C) Glucose. D) Oxygen. Show Answer Correct Answer: B) Chlorophyll. 13. DNA stands for: A) Deoxyriboclean. B) Does Nothing Always. C) Did Not Attempt. D) Deoxyribonucleic acid. Show Answer Correct Answer: D) Deoxyribonucleic acid. 14. Which type of reaction is the breakdown of starch into sugars? A) Denaturation. B) Reducation. C) Catabolic. D) Condensation. Show Answer Correct Answer: C) Catabolic. 15. Which of the following is considered a protein's secondary structure? A) Alpha helices. B) Beta sheets. C) Interactions between close amino acids. D) All of the above. Show Answer Correct Answer: D) All of the above. 16. Mutations are..... A) Changes in the sequence of DNA. B) Broken chromosomes. C) Bad genes. D) None of above. Show Answer Correct Answer: A) Changes in the sequence of DNA. 17. Where does photosynthesis occur? A) Mitochondria. B) Stomata. C) Xylem. D) Chloroplast. Show Answer Correct Answer: D) Chloroplast. 18. Which of the following would be a nucleotide found in DNA A) Ribose + phosphate + uracil. B) Deoxyribose + phosphate + uracil. C) Deoxyribose + phosphate + adenine. D) Ribose + phosphate + adenine. Show Answer Correct Answer: C) Deoxyribose + phosphate + adenine. 19. Which of the following describes RNA? A) RNA is usually double-stranded and contains the base thymine. B) RNA is usually single-stranded and contains the base uracil. C) RNA is longer than DNA and uses five bases to encode information. D) RNA is made in the nucleus of eukaryotic cells and stay there to carry out its functions. Show Answer Correct Answer: B) RNA is usually single-stranded and contains the base uracil. 20. Which digestive process STARTS cellular respiration? A) Eliminating waste. B) Filtering out harmful substances. C) Breaking down food into glucose. D) Chewing up food in your mouth into smaller pieces. Show Answer Correct Answer: D) Chewing up food in your mouth into smaller pieces. ← PreviousNext →Related QuizzesBiology QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9Molecular Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books