This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 21 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the name of the second step of protein synthesis? A) Transcription. B) Translation. C) Transportation. D) Protein synthesis. Show Answer Correct Answer: B) Translation. 2. Which types of organisms use cellular respiration in mitochondria to produce ATP? A) Prokaryotes. B) Eukaryotes. C) Animals only. D) All of these. Show Answer Correct Answer: B) Eukaryotes. 3. What is catabolite activator protein? A) Lactose sensor. B) Sense glucose through hunger signal, cAMP. C) Active the transcription when the glucose is high. D) Stop the transcription of the operon when the glucose is low. Show Answer Correct Answer: B) Sense glucose through hunger signal, cAMP. 4. Which of the following describes the product of transcription? A) Contains ribose and U" s. B) Contains deoxyribose and T's. C) Contains ribose and T's. D) Contains deoxyribose and U's. Show Answer Correct Answer: A) Contains ribose and U" s. 5. Which is most likely the result of a diet HIGH IN SUGARS AND FATS? A) Cancer. B) Diabetes. C) Melanoma. D) Tuberculosis. Show Answer Correct Answer: B) Diabetes. 6. Which of the following describes the major energy transformation taking place in photosynthesis A) Radiant energy is being converted into chemical energy. B) Sound energy is being converted into potential energy. C) Chemical energy is being converted into electrical energy. D) Mechanical energy is being converted into kinetic energy. Show Answer Correct Answer: A) Radiant energy is being converted into chemical energy. 7. What did Hershey and Chase's work show? A) Genes are probably made of DNA. B) Genes are probably made of protein. C) Viruses contain DNA but not protein. D) Bacteria contain DNA but not protein. Show Answer Correct Answer: A) Genes are probably made of DNA. 8. Which best explains how mold is able to grow on an old piece of cheese in the refrigerator? A) Mold is produced when the cheese ages and reacts with moisture in the air. B) Mold is naturally contained within the cheese and starts growing when the cheese becomes old. C) Mold spores are present in the air, and the cheese provides the energy and building materials the mold needs to grow and survive. D) Mold spores are present in the air, and the moisture in the air provides the energy and building materials the mold needs to survive. Show Answer Correct Answer: C) Mold spores are present in the air, and the cheese provides the energy and building materials the mold needs to grow and survive. 9. Which nutrient helps cool the body down and remove liquid waste? A) Water. B) Fats. C) Vitamins. D) Carbohydrates. Show Answer Correct Answer: A) Water. 10. Where are rRNA and tRNA made in the cell? A) The nucleolus in the cytoplasm. B) The nucleolus in the mitochondria. C) The nucleolus in the nucleus. D) Always in the cytoplasm. Show Answer Correct Answer: C) The nucleolus in the nucleus. 11. If the percentage of DNA is made of 30% Thymine, what is the correct percentage of Guanine? A) 30. B) 15. C) 20. D) 60. Show Answer Correct Answer: C) 20. 12. ..... is/are the body's main or 1st choice of energy A) Water. B) Carbohydrates. C) Protein. D) Fats. Show Answer Correct Answer: B) Carbohydrates. 13. T6- In order to insert a human gene into plasmid, both must A) Code for the same gene product. B) Be cut by the same restriction enzyme. C) Originate from the same type of cell. D) Have identical sequences. Show Answer Correct Answer: B) Be cut by the same restriction enzyme. 14. Which events take place in DNA replication?I. Formation of messenger RNAII. Both strands act as templatesIII. Formation of complementary strands by DNA polymerase A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: C) II and III only. 15. If the structure of DNA were likened to a ladder, what would make up the "supporting structure" (not the "rungs" ) of the ladder? A) Amino acids and sugars. B) Nucleotide bases, including thymine. C) Nucleotide bases, including uracil. D) Sugar-phosphate molecules. Show Answer Correct Answer: D) Sugar-phosphate molecules. 16. Which do ALL proteins have? A) Beta pleated sheets. B) Globular shape. C) Primary structure. D) Quaternary structure. Show Answer Correct Answer: C) Primary structure. 17. Where can you find the DNA in a prokaryotic cell? A) The nucleus. B) The cell envelope. C) The ribosomes. D) The cytoplasm. Show Answer Correct Answer: D) The cytoplasm. 18. Where does translation take place? A) Nucleus. B) Smooth ER. C) Lysosome. D) Cytoplasm. Show Answer Correct Answer: D) Cytoplasm. 19. Which of the following is/are true of cellulose?I. It is an unbranched polymer of alpha-D-glucoseII. It contains $\beta$-1, 4 glycosidic bondsIII. Hydrogen bonds form between parallel chains A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: C) II and III only. 20. What is the goal of bacterial transformation? A) Grow bacteria. B) Cut DNA into fragments and compare fragment sizes to determine genotype. C) Amplify a small amount of DNA. D) Insert a desired gene into a plasmid and insert it into a bacterium. Show Answer Correct Answer: D) Insert a desired gene into a plasmid and insert it into a bacterium. ← PreviousNext →Related 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 9Molecular Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books