This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 41 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 41 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary purpose of using restriction enzymes in gel electrophoresis? A) It restricts the number of base pairs that can be tested in a sample. B) It makes the testing simpler by moving the strands into the gel faster. C) It allows the DNA strands to be charged so the electrical current can send the strands into the gel. D) It allows the strands of DNA to be cut into various lengths for testing. Show Answer Correct Answer: D) It allows the strands of DNA to be cut into various lengths for testing. 2. What is the difference in pieces between the following scenarios..... a circular plasmid cut three times VS a linear (straight line) DNA cut three times A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: B) 1. 3. What is the complimentary mRNA sequence to the DNA sequence A-T-T-G-C-A. A) T-A-A-C-G-T. B) U-A-A-C-G-T. C) U-A-A-C-G-U. D) T-A-A-G-C-U. Show Answer Correct Answer: C) U-A-A-C-G-U. 4. Human cells need energy to survive. From which source does this energy originally come? A) Plants. B) Animals. C) Sunlight. D) Water. Show Answer Correct Answer: C) Sunlight. 5. What is the difference between galactose and lactose? A) Galactose is a sugar found in milk but lactose is not found in milk. B) Lactose is an enzyme and galactose is a hormone. C) Lactose is the product of anaerobic respiration in humans and galactose is the product of anaerobic respiration in yeast. D) Lactose is a disaccharide and galactose is a monosaccharide. Show Answer Correct Answer: D) Lactose is a disaccharide and galactose is a monosaccharide. 6. The technique known as karyotyping is used to detect abnormalities in what? A) Chromosomes. B) Ribosomes. C) Blood and urine. D) Amniotic fluid. Show Answer Correct Answer: A) Chromosomes. 7. If the mRNA strand is: CAUGCU what is the DNA that codes for it? A) GUACGA. B) GTACGA. C) CATGCT. D) CTACGT. Show Answer Correct Answer: B) GTACGA. 8. When cloning an organism, DNA is removed and placed into an empty A) Virus. B) Sperm cell. C) Bacteria cell. D) Egg cell. Show Answer Correct Answer: D) Egg cell. 9. Which biomolecule contains fats, oils, and waxes? A) Proteins. B) Nucleic Acid. C) Lipids. D) Carbohydrate. Show Answer Correct Answer: C) Lipids. 10. Process of making multiple copies of short DNA sequences in a test tube A) PCR. B) Mismatch repair. C) Proofreading. D) Telomerase. Show Answer Correct Answer: A) PCR. 11. Why is a healthy diet important? A) It maintains a constant body temperature. B) It prevents damage to internal organs. C) It makes oxygen for all the cells in the body. D) It supplies the body's needs for growth and energy. Show Answer Correct Answer: D) It supplies the body's needs for growth and energy. 12. How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different? A) The two different cells become mutated. B) The proteins expressed in each cell are different. C) They actually have different DNA in the two types of cells. D) The genome of the different cells changes. Show Answer Correct Answer: B) The proteins expressed in each cell are different. 13. Which lifestyle choices are unhealthy? A) Daily exercise. B) Maintaining a high body mass index. C) A diet high in vegetables and low in proteins. D) None of above. Show Answer Correct Answer: B) Maintaining a high body mass index. 14. What structure mediates and controls the formation of polypeptides? A) Ribosome. B) Mitochondria. C) Nucleus. D) Golgi bodies. Show Answer Correct Answer: A) Ribosome. 15. What is the correct description of eukaryotic chromosomes? A) Many linear pieces of DNA in the cytoplasm. B) Many linear pieces of DNA in the nucleus. C) One circular piece of DNA in the cytoplasm. D) Many circular pieces of DNA in the nucleus. Show Answer Correct Answer: B) Many linear pieces of DNA in the nucleus. 16. Which component of DNA determines the traits of an organism? A) Nitrogen Bases. B) Sugar-Phosphate Backbone. C) Hydrogen bonds. D) None of above. Show Answer Correct Answer: A) Nitrogen Bases. 17. Which nutrient helps build and repair muscles, cells and tissues in the body? A) Carbohydrates. B) Protein. C) Fats. D) Minerals. Show Answer Correct Answer: B) Protein. 18. What determines the nucleotide sequence of the newly synthesized strand during DNA replication? A) The particular DNA polymerase catalyzing the reaction. B) The relative amounts of the four nucleoside triphosphates in the cell. C) The nucleotide sequence of the template strand. D) The primase used in the reaction e. the arrangement of histones in the sugar phosphate backbone. Show Answer Correct Answer: C) The nucleotide sequence of the template strand. 19. The first transposable elements was discovered by A) James Watson. B) Barbara McClintock. C) Francis Crick. D) None of above. Show Answer Correct Answer: B) Barbara McClintock. 20. What is the ratio of hydrogen atoms to oxygen atoms in carbohydrates? A) 1:1. B) 2:1. C) 3:1. D) 4:1. Show Answer Correct Answer: B) 2:1. ← 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