This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 7 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the difference between an intron and an exon? A) Exons are sections of mRNA that are not needed for protein synthesis. Introns are sections of mRNA that are needed for protein synthesis. B) Introns are sections of mRNA that are not needed for protein synthesis. Exons are sections of mRNA that are needed for protein synthesis. C) Exons are sections of mRNA that had mutations which have been fixed. Introns are sections of mRNA that were fine with no mutations. D) Introns are sections of mRNA that had mutations which have been fixed. Exons are sections of mRNA that were fine with no mutations. Show Answer Correct Answer: B) Introns are sections of mRNA that are not needed for protein synthesis. Exons are sections of mRNA that are needed for protein synthesis. 2. Protein is broken down into ..... before they are asborbed into the small intestines. A) Fatty acids. B) Amino acids. C) Citric acid. D) Hydrochiloric. Show Answer Correct Answer: B) Amino acids. 3. When a DNA molecule is replicated, how do the new molecules compare to the original molecule? A) Each new DNA molecule has half of the information of the original. B) Each new DNA molecule has double the information of the original. C) Each new DNA molecule is an exact complement of the original. D) Each new DNA molecule is an exact duplicate of the original. Show Answer Correct Answer: D) Each new DNA molecule is an exact duplicate of the original. 4. ..... convert light energy into food through photosynthesis. A) Vacuoles. B) Ribosomes. C) The Golgi apparatus. D) Chloroplasts. Show Answer Correct Answer: D) Chloroplasts. 5. 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. 6. Which is an effect of protein denaturation? A) The order of amino acids is changed when the protein overheats. B) The bonds between amino acids are broken by condensation. C) Parts of the protein become linked together by hydrolysis. D) The three-dimensional structure of the protein is altered. Show Answer Correct Answer: D) The three-dimensional structure of the protein is altered. 7. 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. 8. What is the name for this: each sequence of DNA bases encodes the information needed to make a unique protein A) Replication. B) One-gene, one-protein theory. C) One-gene, one-protein hypothesis. D) Transcription. Show Answer Correct Answer: C) One-gene, one-protein hypothesis. 9. 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. 10. Which best describes where the process of translation happens within a living cell? A) In the nucleus. B) At a ribosome in the cytoplasm. C) In a mitochondrion near a ribosome. D) On the vacuole attached to the nucleus. Show Answer Correct Answer: B) At a ribosome in the cytoplasm. 11. What is the maximum number of fatty acids that can be condensed with glycerol? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 12. If 20% of a DNA sample is made up of thymine, T, what percentage of the sample is made up of cytosine, C? A) 15%. B) 30%. C) 35%. D) 50%. Show Answer Correct Answer: B) 30%. 13. 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. 14. The process of making an mRNA strand from a DNA template is called A) Replication. B) Transcription. C) Translation. D) Protein Synthesis. Show Answer Correct Answer: B) Transcription. 15. 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. 16. This is high between active site and substrate and low between active site and product A) Orientation. B) Lowers activation energy. C) Induced fit. D) Affinity. Show Answer Correct Answer: D) Affinity. 17. 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. 18. 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. 19. During ....., cells break down simple food molecules and release energy. A) Photosynthesis. B) Cellular respiration. C) Glycolysis. D) Anaerobic respriation. Show Answer Correct Answer: B) Cellular respiration. 20. Which best describes the purpose of food? A) To kill bacteria. B) To prevent disease. C) To eliminate waste materials. D) To provide fuel for cell processes. Show Answer Correct Answer: D) To provide fuel for cell processes. ← PreviousNext →Related QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 8Molecular Biology Quiz 9Molecular Biology Quiz 10Molecular Biology Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books