This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 4 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The induced fit model is preferred over the lock-and-key model because A) Some enzymes catalyze multiple reactions. B) All substrates have the same shape. C) The active site is a polar region. D) The enzyme and substrate match each other structurally and chemically. Show Answer Correct Answer: A) Some enzymes catalyze multiple reactions. 2. How many amino acids are coded for by this sequence of nucleotides:ATG GGA ACT CCA A) 4. B) 2. C) 6. D) 12. Show Answer Correct Answer: A) 4. 3. An insertion sequence or IS element is a short ..... sequence moves from one location to another A) DNA. B) RNA. C) MRNA. D) TRNA. Show Answer Correct Answer: A) DNA. 4. DNA has the following bases EXCEPT: A) Cytosine. B) Adenine. C) Guanine. D) Uracil. Show Answer Correct Answer: D) Uracil. 5. What are Okazaki fragments? A) Pieces of new DNA forming on the lagging strand. B) Pieces of new DNA forming on that leading strand. C) Pieces of DNA that are discarded. D) Pieces of RNA that serve as primers. Show Answer Correct Answer: A) Pieces of new DNA forming on the lagging strand. 6. ..... fills the single stranded gaps in mechanism of bacterial IS element transpositions A) RNA polymerase. B) DNA polymerase. C) RNA ligase. D) DNA ligase. Show Answer Correct Answer: B) DNA polymerase. 7. What is a difference between the sense and antisense strands of DNA? A) Nucleotides are linked to the sense strand by hydrogen bonding during transcription, but not to the antisense strand. B) The sense strand has the same base sequence as tRNA, but the antisense strand does not. C) Nucleotides are linked to the antisense strand by hydrogen bonding during transcription, but not to the sense strand. D) The antisense strand has the same base sequence as mRNA but the sense strand does not. Show Answer Correct Answer: C) Nucleotides are linked to the antisense strand by hydrogen bonding during transcription, but not to the sense strand. 8. Which best describes the process by which the energy from the sun is used to create glucose (sugar) molecules? A) Fermentation. B) Photosynthesis. C) Chemosynthesis. D) Cellular respiration. Show Answer Correct Answer: B) Photosynthesis. 9. Which food provides the most energy for the body in the shortest amount of time? A) Potato. B) Meat. C) Milk. D) Fruit. Show Answer Correct Answer: D) Fruit. 10. Why is the action spectrum for photosynthesis similar to the absorption spectra of photosynthetic pigments? A) Photosynthetic pigments have the same optimum temperature as the enzymes used in photosynthesis. B) Plants absorb the same photosynthetic pigments for use in photosynthesis. C) Only wavelengths of light absorbed by pigments can be used in photosynthesis. D) The amount of energy absorbed by photosynthetic pigments is equal to the activation energy for photosynthesis. Show Answer Correct Answer: C) Only wavelengths of light absorbed by pigments can be used in photosynthesis. 11. The enzyme during transcription moves in ..... direction and construction of mRNA is in ..... direction. A) 3' to 5', 3' to 5'. B) 3' to 5', 5' to 3'. C) 5' to 3', 5' to 3'. D) 5' to 3' and 3' to 5'. Show Answer Correct Answer: B) 3' to 5', 5' to 3'. 12. Where in the cell does translation occur? A) Always the cytoplasm. B) Always the nucleus. C) In the cytoplasm in eukaryotes and the nucleus in prokaryotes. D) In the cytoplasm in prokaryotes and the nucleus in eukaryotes. Show Answer Correct Answer: A) Always the cytoplasm. 13. What charge is DNA? A) Positive. B) Negative. C) Neutral. D) None of above. Show Answer Correct Answer: B) Negative. 14. A mutation can occur if a base pair is ....., deleted, or substituted for another. A) Modified. B) Added. C) Transferred. D) None of above. Show Answer Correct Answer: B) Added. 15. A polymer of alpha-D-glucose found in plants has mostly 1, 4 linkages and some 1, 6 linkages. Which molecule fits this description? A) Glycogen. B) Cellulose. C) Amylose. D) Amylopectin. Show Answer Correct Answer: D) Amylopectin. 16. Where is replication located? A) Nucleus. B) Cytoplasm. C) Ribosome. D) Nucleolus. Show Answer Correct Answer: A) Nucleus. 17. Crystal is trying to increase the protein in her diet. Which foods will best satisfy this nutritional need? A) Peas, fish, milk, and beans. B) Apples, carrots, juice, and rice. C) Kiwi, lettuce, tea, and strawberries. D) Watermelon, spinach, coffee, and pasta. Show Answer Correct Answer: A) Peas, fish, milk, and beans. 18. Which biomolecule is your main source of energy? A) Nucleic Acid. B) Protein. C) Lipid. D) Carbohydrate. Show Answer Correct Answer: D) Carbohydrate. 19. A template strand of DNA is 3' TAGGCATTGCA 5'.What is the complementary DNA strand that is created from this template during replication? A) 5' TGCAATGCCTA 3'. B) 5' TAGGCATTGCA 3'. C) 5' AUCCGUAACGU 3'. D) 5' ATCCGTAACGT 3'. Show Answer Correct Answer: D) 5' ATCCGTAACGT 3'. 20. Bacteria protect themselves from viruses by fragmenting viral DNA with A) Ligase. B) Endonuclease. C) Exonuclease. D) Gyrase. Show Answer Correct Answer: B) Endonuclease. ← PreviousNext →Related QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9Molecular Biology Quiz 10Molecular Biology Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books