This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 28 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The main enzyme involved in linking individual nucleotides into DNA molecules is A) DNA protease. B) Ribose. C) Carbohydrase. D) DNA polymerase. Show Answer Correct Answer: D) DNA polymerase. 2. Where in the cell does the second step of protein synthesis occur? A) In the DNA. B) In the nucleus. C) In the Golgi Apparatus. D) At the ribosome. Show Answer Correct Answer: D) At the ribosome. 3. During which process is mRNA formed? A) Transcription. B) Replication. C) Translation. D) Mutation. Show Answer Correct Answer: A) Transcription. 4. An RNA sequence includes 15 codons. How many amino acids does this sequence have? A) 3. B) 5. C) 15. D) 45. Show Answer Correct Answer: C) 15. 5. Which combination of foods BEST provides a healthy and nutritious meal? (not which one you like the best!) A) Steak, fries, orange juice, banana. B) Baked potato, chicken nuggets, fruits, and orange juice. C) Apple, grilled chicken sandwich, orange juice, and yogurt. D) Macaroni and cheese, orange juice, ice cream, and pound cake. Show Answer Correct Answer: C) Apple, grilled chicken sandwich, orange juice, and yogurt. 6. DNA helicase "unzips" double-stranded DNA to expose single-stranded section of DNA. New strands are generated using the original strand as a template. How do the newly-generated strands compare to the original template strands? A) They are identical. B) They are twice as long. C) They are much shorter. D) They are complementary. Show Answer Correct Answer: D) They are complementary. 7. How can the activity of a human amylase enzyme be increased during a laboratory experiment? A) Adding sugar to the mixture. B) Decreasing the pH from 7 to 3. C) Increasing the temperature from 20$^\circ$C to 37$^\circ$C. D) Adding water to the mixture. Show Answer Correct Answer: C) Increasing the temperature from 20$^\circ$C to 37$^\circ$C. 8. A new variety of rice called golden rice has been genetically modified to have vitamin A. People in starving countries can eat this rice and receive the vitamin A. Without this rice people go blind from vitamin A deficiency. What word(s) below best describes this rice? A) Electrophoresis. B) DNA fingerprinting. C) G.M.O. D) Clone. Show Answer Correct Answer: C) G.M.O. 9. Which of these molecules is a disaccharide? A) Galactose. B) Sucrose. C) Cellulose. D) Ribose. Show Answer Correct Answer: B) Sucrose. 10. Genetic screening technologies allow scientists to take a small sample of DNA from a developing organism and predict possible diseases the organism may develop during its lifetime. This is done by comparing the genes of the developing organism to the specific genes that code for and possibly develop into the disease later in life.Which question is least likely to accompany the use of genetic screening technologies? A) Who will be able to benefit from this tchnology. B) What effect will the use of this technology have on the treatment of the common cold?. C) Do the benefits of this technology outweigh the risks involved?. D) How will the knowledge obtained from this technology affect an individual?. Show Answer Correct Answer: B) What effect will the use of this technology have on the treatment of the common cold?. 11. Which would NOT be considered a substrate of cellular respiration? A) C6H12O6. B) CO2. C) ADP. D) O2. Show Answer Correct Answer: B) CO2. 12. Which of the following mutations would be most likely to have a harmful effect on an organism? A) A deletion of 3 nucleotides near the middle of the gene. B) A single nucleotide deletion in the middle of an intron. C) A single nucleotide deletion near the end of the coding sequence. D) A single nucleotide insertion downstream of, and close to, the start of the coding sequence. Show Answer Correct Answer: D) A single nucleotide insertion downstream of, and close to, the start of the coding sequence. 13. DNA mediated transposition includes A) Viral retro transposons. B) Eukaryotic transposons. C) Non - viral retro transposons. D) None of above. Show Answer Correct Answer: B) Eukaryotic transposons. 14. What is the start codon which establishes the reading frame? A) CCC. B) GGG. C) AUG. D) ACT. Show Answer Correct Answer: C) AUG. 15. DNA replication is referred to as the semi-conservative model because the two new DNA molecules are A) Each made of two new strands. B) Each made of one original and one new strand. C) Each made of two original strands. D) None of above. Show Answer Correct Answer: B) Each made of one original and one new strand. 16. What is chemical evolution? A) Organic life sprung from non-organic matter exclusively through a natural mechanistic process on a pre-biotic earth. B) Newly formed organic molecules polymerized to produce larger molecules and macromolecules. C) Chemoheterotrophs-consume organic molecules for both energy and carbon. D) Organic compounds in organic soup became depleted, prokaryotes that are able to make their own organic compounds from inorganic precursors. Show Answer Correct Answer: A) Organic life sprung from non-organic matter exclusively through a natural mechanistic process on a pre-biotic earth. 17. Conformational hypothesis was postulated by A) P. D. Boyer. B) E. C. Slater. C) Peter Mitchell. D) None of above. Show Answer Correct Answer: A) P. D. Boyer. 18. Which choice describes DNA after replication has taken place? A) One molecule with two original strands and one molecule with two new strands. B) Two molecules, each with one original strand and one new strand. C) Two molecules, each with two new strands. D) Two molecules, each with two old strands. Show Answer Correct Answer: B) Two molecules, each with one original strand and one new strand. 19. Which of these options is not good for our health? A) Go to physical education class. B) Swim. C) Be on the sofa all day. D) Run. Show Answer Correct Answer: C) Be on the sofa all day. 20. What is 1 significant issue with many Genetically Modified Organisms? A) They are too expensive to be useful. B) Take a long time to make. C) May affect other organisms in their environment. D) Might evolve more quickly. Show Answer Correct Answer: C) May affect other organisms in their environment. ← PreviousNext →Related QuizzesBiology 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books