This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 8 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which organelle is DNA usually found in? A) Vacuole. B) Chloroplast. C) Nucleus. D) Cell membrane. Show Answer Correct Answer: C) Nucleus. 2. Which of the following processes does not occur in prokaryotes? A) Splicing. B) Replication. C) Translation. D) Transcription. Show Answer Correct Answer: A) Splicing. 3. What are the amino acid produced from these two codons, CGU and CGA? A) Arg and Ala. B) Ser and Pro. C) Phe and Leu. D) Ala and Asp. Show Answer Correct Answer: A) Arg and Ala. 4. In what way did gene therapy, the replacement of a faulty gene with a normal one, stimulate medical research? A) New medications had to be developed and tested. B) The effects of viral DNA had to be studied. C) The way in which DNA replicates had to be determined. D) The genes on each chromosome had to be mapped and described. Show Answer Correct Answer: D) The genes on each chromosome had to be mapped and described. 5. Which nutrient molecules are most closely linked to heart disease in humans? A) Fats. B) Nitrates. C) Carbohydrates. D) Proteins. Show Answer Correct Answer: A) Fats. 6. Many factors affect human health. Which term BEST describes diet and exercise for MOST adults? A) Lifestyle choice. B) Environmental factors. C) Genetic predisposition. D) Medically prescribed behavior. Show Answer Correct Answer: A) Lifestyle choice. 7. Which of the following is NOT a part of My Plate? A) Grains. B) Fruit. C) Candy. D) Protein. Show Answer Correct Answer: C) Candy. 8. Enzymes act as catalysts to ..... the rate of a biochemical reaction by ..... the activation energy needed for the reaction to occur. A) Decrease, raising. B) Decrease, lowering. C) Increase, lowering. D) Increase, raising. Show Answer Correct Answer: C) Increase, lowering. 9. What enzyme is responsible for laying down the RNA primers during DNA Replication? A) There are no RNA primers during DNA Replication. B) Helicase. C) Ligase. D) RNA Primase. Show Answer Correct Answer: D) RNA Primase. 10. The function of ..... is to combine with proteins to form ribosomes. A) MRNA. B) RRNA. C) DNA. D) TRNA. Show Answer Correct Answer: B) RRNA. 11. Prokaryotic does not have A) Life. B) Cell membrane. C) Membrane bound organelles. D) DNA or RNA. Show Answer Correct Answer: C) Membrane bound organelles. 12. The four nitrogenous bases of DNA are A) Adenine, guanine, cytosine, and uracil. B) Adenine, guanine, cytosine, and thymine. C) Adenine, guanine, ribose and deoxyribose. D) Adenine, deoxyribose, cytosine, and uracil. Show Answer Correct Answer: B) Adenine, guanine, cytosine, and thymine. 13. Phosphorylation is the process by which a ..... is added to a protein to activate it. A) Acetyl. B) Sulfate. C) Phosphate. D) None of above. Show Answer Correct Answer: C) Phosphate. 14. The five carbon sugar found in RNA A) Ribose. B) Deoxyribose. C) Glucose. D) None of above. Show Answer Correct Answer: A) Ribose. 15. Which of the following sequences of processes correctly reflects the central dogma? A) Translation, transcription, protein synthesis. B) Protein synthesis, transcription, translation. C) Transcription, translation, protein synthesis. D) Protein synthesis, translation, transcription. Show Answer Correct Answer: C) Transcription, translation, protein synthesis. 16. What advantage do SUGARS provide for an organism's diet? A) Provide code for DNA of offspring. B) Produce ENERGY for cells. C) Supply amino acids needed to build muscle tissue. D) Provide minerals needed to build strong bones. Show Answer Correct Answer: B) Produce ENERGY for cells. 17. Transcription takes place in the A) Ribosome. B) Cytoplasm. C) Mitochondrion. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 18. What was Watson and Crick's main scientific accomplishment? A) Building the first accurate model of DNA. B) Determining base pairing rules. C) Discovering the process of genetic transformation. D) Isolating strains of pneumonia causing bacteria. Show Answer Correct Answer: A) Building the first accurate model of DNA. 19. An RNA molecule is A) Double helix. B) Always double stranded. C) Usually double stranded. D) Single stranded. Show Answer Correct Answer: D) Single stranded. 20. The first transposable element was discovered in A) 1980's. B) 1930's. C) 1940's. D) 1950's. Show Answer Correct Answer: C) 1940's. 21. The color of a rose in an inherited trait. The molecular basis for the expression of the color trait depends directly on which of these cell function? A) Protein synthesis. B) Respiration. C) Hormone production. D) Photosynthesis. Show Answer Correct Answer: A) Protein synthesis. 22. Which of the following is NOT a Dairy source? A) Cheese. B) Eggs. C) Milk. D) Yogurt. Show Answer Correct Answer: B) Eggs. 23. The cAMP/PKA signal transduction pathway is used in cells is an example of ..... A) "fight or flight" response. B) Changes in motility. C) Changes in gene expression. D) None of above. Show Answer Correct Answer: A) "fight or flight" response. 24. Which enzyme bonds together the Okazaki fragments in the lagging strand? A) Helicase. B) Ligase. C) Primerase. D) Polymerase. Show Answer Correct Answer: B) Ligase. 25. Which organic molecule contains phosphorus? A) Carbohydrate. B) Protein. C) Nucleic acid. D) Lipid. Show Answer Correct Answer: C) Nucleic acid. 26. The elongation of the leading strand during DNA synthesis A) Occurs in the 3' to 5' direction. B) Progresses away from the replication fork. C) Depends on the action of DNA polymerase. D) Produces Okazaki fragments. Show Answer Correct Answer: C) Depends on the action of DNA polymerase. 27. The main function of tRNA is to..... A) Carry a message that, when translated, forms proteins. B) Form a portion of ribosomes. C) String together complementary RNA and DNA strands. D) Bring amino acids from the cytoplasm to the ribosomes. Show Answer Correct Answer: D) Bring amino acids from the cytoplasm to the ribosomes. 28. 10 $\mu$g is equivalent to ..... mg. A) 0.01. B) 0.1. C) $10.0 \times 10^3 $. D) 1000. Show Answer Correct Answer: A) 0.01. 29. Which would be MOST beneficial to an individual suffering from heart disease? A) Drinking a glass of fruit juice with every meal. B) Playing Fortnite for 6 hours a day. C) Walking on a treadmill for 30 minutes every day. D) Eating foods with a high calorie content. Show Answer Correct Answer: C) Walking on a treadmill for 30 minutes every day. 30. Chargaff's rules for pairing of nitrogen bases is A) A=C and G=T. B) A pairs with T and G pairs with C. C) A pairs with G and C pairs with T. D) A pairs with C and G pairs with T. Show Answer Correct Answer: B) A pairs with T and G pairs with C. ← PreviousNext →Related QuizzesBiology QuizzesAgriculture QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books