This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 18 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What part of your body will be most benefited from exercise? A) Your bones. B) Your muscles. C) Your heart. D) All of these. Show Answer Correct Answer: D) All of these. 2. In replication, DNA ..... reads the strand and attaches a complementary base pair to the DNA A) Helicase. B) Phages. C) Polymerase. D) Bonds. Show Answer Correct Answer: C) Polymerase. 3. Which substance in organisms can contain sulfur? A) DNA. B) Phospholipids. C) Proteins. D) Triglycerides. Show Answer Correct Answer: C) Proteins. 4. RNA is read in sections called: A) Triplets. B) Genes. C) Codons. D) Genes. Show Answer Correct Answer: C) Codons. 5. What is lac repressor? A) Glucose sensor. B) Start acting as repressor when glucose is present. C) Block transcription of operon in certain condition. D) Bind to isomer of allalactose. Show Answer Correct Answer: C) Block transcription of operon in certain condition. 6. Which choices describe DNA replication? A) Semiconservative. B) Produces two pieces of DNA identical to the original. C) Products are half original and half new. D) All of the above. Show Answer Correct Answer: D) All of the above. 7. Which of the following is used to cut DNA from organisms? A) Gel Electrophoresis. B) Restriction Enzymes. C) Karyotypes. D) Haplotypes. Show Answer Correct Answer: B) Restriction Enzymes. 8. How many glycerol(s) and fatty acid(s) in a diglyceride? A) 1 glycerol + 1 fatty acid. B) 1 glycerol + 2 fatty acids. C) 2 glycerols + 1 fatty acid. D) 2 glycerols + 2 fatty acids. Show Answer Correct Answer: B) 1 glycerol + 2 fatty acids. 9. The region on the surface of the enzyme that the substrate binds to is the A) Active site. B) Activation energy. C) Lock-and-key model. D) Catalysis. Show Answer Correct Answer: A) Active site. 10. The dairy on your plate should be: A) Chocolate. B) Low fat or fat free. C) Whole milk. D) Cream. Show Answer Correct Answer: B) Low fat or fat free. 11. A triplet of mRNA is called a A) Codon. B) Anticodon. C) Amino acid. D) Peptide bond. Show Answer Correct Answer: A) Codon. 12. A structural protein that forms strong fibers, found in skin, connective tissue and bone (the most abundant protein in the animal kingdom). A) Insulin. B) Immunoglobulins. C) Rhodopsin. D) Collagen. Show Answer Correct Answer: D) Collagen. 13. Enzyme that connects the DNA to the backbone (glues) A) Ligase. B) Polymerase. C) Helicase. D) Primase. Show Answer Correct Answer: A) Ligase. 14. Food is anything that we put into our bodies that give us ....., help us to grow and keep us healthy. A) Energy. B) Sugar. C) Water. D) None of above. Show Answer Correct Answer: A) Energy. 15. Which does NOT need to be marked or measured during separation of pigments by chromatography? A) Starting location of concentrated pigments. B) Distance moved by solvent. C) Distance moved by pigment A. D) Distance between pigments A and B. Show Answer Correct Answer: D) Distance between pigments A and B. 16. What happens in the lysogenic cycle? A) Virus goes in and leaves the host cell. B) Virus quickly kills the host cell. C) Virus inject the nucleic acid into the host cell, and the nucleic acid integrates into the host cell DNA, and stay dormant for a long time. D) Bacteria injects DNA into a host cell. Show Answer Correct Answer: C) Virus inject the nucleic acid into the host cell, and the nucleic acid integrates into the host cell DNA, and stay dormant for a long time. 17. If a cell is needing to pump additional sodium ions out of the cell, what would that cell need in order to do so? A) ATP. B) Oxygen. C) Water. D) Carbon dioxide. Show Answer Correct Answer: A) ATP. 18. Characteristic of tRNA A) Carries the amino acids to the ribosome to be made into the protein. B) Copies the instructions from DNA. C) Makes up the ribosome. D) Is made in the nucleus and moves out into the cytoplasm. Show Answer Correct Answer: A) Carries the amino acids to the ribosome to be made into the protein. 19. Which is the stronger acid? A) PH 1. B) PH 4. C) PH 8. D) PH 13. Show Answer Correct Answer: A) PH 1. 20. Place the order of events for creating a protein in order (1- 6)mRNA attaches to rRNAcodons are continuously read by tRNAtRNA reaches a stop codontRNA connects second amino acid by peptide bond to MethioninePolypeptide chain is createdmRNA's start codon AUG is translated by tRNA's anticodon (Methionine) A) 1, 5, 4, 3, 6, 2. B) 2, 4, 5, 3, 6, 1. C) 1, 2, 3, 4, 5, 6. D) 1, 6, 4, 2, 3, 5. Show Answer Correct Answer: D) 1, 6, 4, 2, 3, 5. ← 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