This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 5 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... convert light energy into food through photosynthesis. A) Vacuoles. B) Ribosomes. C) Chloroplasts. D) The Golgi apparatus. Show Answer Correct Answer: C) Chloroplasts. 2. A mutation that changes a thymine nucleotide to a guanine nucleotide is what type of mutation? A) Frameshift mutation. B) Point mutation. C) Reading frame mutation. D) All of these are correct. Show Answer Correct Answer: B) Point mutation. 3. Which is an effect of protein denaturation? A) The order of amino acids is changed when the protein overheats. B) Parts of the protein become linked together by hydrolysis. C) The three-dimensional structure of the protein is altered. D) The bonds between amino acids are broken by condensation. Show Answer Correct Answer: C) The three-dimensional structure of the protein is altered. 4. What is the opposite reaction of photosynthesis called? A) Cellular Respiration. B) Fermentation. C) Photosynthetic Process. D) Non-photosynthesis. Show Answer Correct Answer: A) Cellular Respiration. 5. What is the name for this: each sequence of DNA bases encodes the information needed to make a unique protein A) Transcription. B) One-gene, one-protein theory. C) One-gene, one-protein hypothesis. D) Replication. Show Answer Correct Answer: C) One-gene, one-protein hypothesis. 6. What is formed during transcription? A) RNA strand complementary to DNA strand, formed by RNA polymerase. B) DNA strand complementary to DNA strand, formed by DNA polymerase. C) RNA strand complementary to RNA strand, formed by DNA polymerase. D) DNA strand complementary to RNA strand, formed by RNA polymerase. Show Answer Correct Answer: A) RNA strand complementary to DNA strand, formed by RNA polymerase. 7. Which best describes where the process of translation happens within a living cell? A) In the nucleus. B) In a mitochondrion near a ribosome. C) On the vacuole attached to the nucleus. D) At a ribosome in the cytoplasm. Show Answer Correct Answer: D) At a ribosome in the cytoplasm. 8. What is the maximum number of fatty acids that can be condensed with glycerol? A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: D) 3. 9. If 20% of a DNA sample is made up of thymine, T, what percentage of the sample is made up of cytosine, C? A) 30%. B) 15%. C) 35%. D) 50%. Show Answer Correct Answer: A) 30%. 10. In the making of a protein, the amino acid order is determined by which of the following? A) The amount of glucose present in the cell. B) The order of genes expressed in the chromosomes. C) The order of nitrogenous bases in DNA. D) The random addition of amino acids from the tRNA. Show Answer Correct Answer: C) The order of nitrogenous bases in DNA. 11. The process of making an mRNA strand from a DNA template is called A) Replication. B) Protein Synthesis. C) Transcription. D) Translation. Show Answer Correct Answer: C) Transcription. 12. How are plant cells and human cells the same? A) They can produce their own oxygen. B) They can receive nutrients through the cell wall. C) They make their own glucose from sunlight during photosynthesis. D) They use mitochondria to release energy from glucose during cellular respiration. Show Answer Correct Answer: D) They use mitochondria to release energy from glucose during cellular respiration. 13. This is high between active site and substrate and low between active site and product A) Orientation. B) Affinity. C) Induced fit. D) Lowers activation energy. Show Answer Correct Answer: B) Affinity. 14. The only N-containing nutrient available to a group of bacteria is heavy (15N) nitrogen, All the bacteria divide just once and the new DNA in these new cells is examined (after DNA replication). What type of nitrogen would you find in that DNA? A) Only heavy nitrogen (15N) strands in the DNA molecules. B) Some heavy (15N) and some light nitrogen strands in the DNA molecules. C) One heavy (15N) and one light strand in each DNA molecule. D) Variable nitrogen in the DNA molecules. Show Answer Correct Answer: C) One heavy (15N) and one light strand in each DNA molecule. 15. What do we call DNA replication since new DNA has 1 parent strand and 1 new strand? A) Conservative. B) Semiconservative. C) Dispersive. D) None of above. Show Answer Correct Answer: B) Semiconservative. 16. During ....., cells break down simple food molecules and release energy. A) Glycolysis. B) Anaerobic respriation. C) Cellular respiration. D) Photosynthesis. Show Answer Correct Answer: C) Cellular respiration. 17. Which best describes the purpose of food? A) To kill bacteria. B) To prevent disease. C) To provide fuel for cell processes. D) To eliminate waste materials. Show Answer Correct Answer: C) To provide fuel for cell processes. 18. Which of the following is a base that is NOT contained in DNA? A) Thymine. B) Guanine. C) Uracil. D) Adenine. Show Answer Correct Answer: C) Uracil. 19. Mode of DNA replication is A) Conservative and bidirectional. B) Semiconservative and unidirectional. C) Semiconservative and bidirectional. D) Conservative and unidirectional. Show Answer Correct Answer: C) Semiconservative and bidirectional. 20. What is an example of a protein you could add to your plate? A) Chicken. B) Carrots. C) Apple. D) Olive oil. Show Answer Correct Answer: A) Chicken. 21. Gel electrophoresis separates DNA according to size. Which is true regarding movement of the DNA? A) . the longest pieces of DNA will move the greatest distance. B) The longest pieces of DNA will move the least distance. C) . the shortest pieces of DNA will move the least distance. D) The shortest pieces of DNA line up along the middle. Show Answer Correct Answer: C) . the shortest pieces of DNA will move the least distance. 22. TRANSCRIPTION:Transcription occurs in the: A) Ribosomes. B) Kitchen. C) Nucleus. D) Cytoplasm. Show Answer Correct Answer: C) Nucleus. 23. Which DIRECTLY determines the sequence of amino acids in a polypeptide chain? A) RRNA. B) DNA. C) MRNA. D) TRNA. Show Answer Correct Answer: C) MRNA. 24. The cell theory said that A) Atoms create all matter. B) Living things evolve. C) Cell activities depends on the activities of subcellular structures within the cell. D) Cells are the basic unit of structure and organization of organisms. Show Answer Correct Answer: D) Cells are the basic unit of structure and organization of organisms. 25. What replaces thymine in the RNA? A) Uracil. B) Cytosine. C) Adenine. D) Guanine. Show Answer Correct Answer: A) Uracil. 26. The two strands in DNA..... A) Run in opposite directions (antiparallel). B) Run in perpindicular directions. C) Run in the same direction (parallel). D) Run in random directions. Show Answer Correct Answer: A) Run in opposite directions (antiparallel). 27. What is the role of DNA ligase enzyme in Replication? A) Sealing of nucleotides nicks. B) Synthesis of DNA strand. C) Lagging strand synthesis. D) All of the above. Show Answer Correct Answer: A) Sealing of nucleotides nicks. 28. Which of the following statements is true about protein synthesis in prokaryotes? A) Prokaryotic cells have complicated mechanisms for targeting proteins to the appropriate cellular organelles. B) Translation requires antibiotic activity. C) Extensive RNA processing is required before prokaryotic transcripts can be translated. D) Translation can begin while transcription is still in progress. Show Answer Correct Answer: D) Translation can begin while transcription is still in progress. 29. What is the name given to the first step of protein synthesis? A) Translation. B) Transcription. C) Protein synthesis. D) Translocation. Show Answer Correct Answer: B) Transcription. 30. Gel electrophoresis A) The method of copying strands of DNA. B) The method for cutting strands of DNA. C) The method for separating strands of DNA. D) None of above. Show Answer Correct Answer: C) The method for separating strands of DNA. ← PreviousNext →Related QuizzesBiology QuizzesAgriculture QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books