This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 56 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 56 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is NOT a correct pairing? A) Rubisco-enzyme for carbon fixation. B) Rhodopsin-light-sensitive pigment. C) Collagen-structural support and connections. D) Insulin-enzyme to reduce blood glucose. Show Answer Correct Answer: D) Insulin-enzyme to reduce blood glucose. 2. The DNA base sequence AAA-CAG-CTG will code for what mRNA base sequence? A) TTT-CAG-CTG. B) AAA-CAG-CTG. C) AAA-GUC-GAC. D) UUU-GUC-GAC. Show Answer Correct Answer: D) UUU-GUC-GAC. 3. Which of the following statements is/are correct for DNA replication?I. It occurs during interphase.II. It is semi-conservative.III. It is a stage in protein synthesis. A) I only. B) I and II only. C) II only. D) I, II, and III. Show Answer Correct Answer: B) I and II only. 4. The table shows the daily calorie intakes and frequencies of physical activity for four students of equal height and weight in one week.Student DailyCalorieIntake Physical Act1 1, 500 3 times a week2 2, 000 3 times a week3 2, 500 3 times a week4 3, 000 3 times a weekIf each student requires 2, 100 calories a day and exercise 4 times a week, which statement describes the general health of one of the students? A) Student 1 will have the highest BMR. B) Student 2 will maintain a nearly constant weight. C) Student 3 will have he best bone strength. D) Student 4 will develop the best muscle tone. Show Answer Correct Answer: B) Student 2 will maintain a nearly constant weight. 5. What is the primary function of DNA in organisms? A) Binds to specific active sites on enzymes. B) Stores genetic information. C) Transports amino acids to the ribosomes. D) Produces chromosomes for sexual reproduction. Show Answer Correct Answer: B) Stores genetic information. 6. When and how did oxygen gas first affect rock formation on Earth? A) 4.2 BYA, dissolved calcium carbonate. B) 2.4 BYA, dissolved calcium carbonate. C) 4.2 BYA, precipitated iron as iron oxide. D) 2.4 BYA, precipitated iron as iron oxide. Show Answer Correct Answer: D) 2.4 BYA, precipitated iron as iron oxide. 7. Which would most likely reduce the risk of heart disease? A) Decreased exercise and a diet low in fat. B) Increased exercise and a diet high in fat. C) Increased exercise and a diet low in carbohydrates. D) Decreased exercise and a diet high in carbohydrates. Show Answer Correct Answer: C) Increased exercise and a diet low in carbohydrates. 8. What is the correct sequence of steps for transcription in a Eukaryote? A) Initiation, Elimination, and Termination. B) Elongation, Initiation, and Termination. C) DNA, RNA, and Polypeptide. D) Initiation, Elongation, and Termination. Show Answer Correct Answer: D) Initiation, Elongation, and Termination. 9. Suppose a double-stranded DNA molecule was shown to have 15% adenine bases. What would be the expected percentage of guanine bases in that molecule? A) 15%. B) 35%. C) 85%. D) Not enough information. Show Answer Correct Answer: B) 35%. 10. What structure is responsible for the splicing of the pre-mRNA? A) Nucleus. B) RNAse. C) Spliceosome. D) Ribozymes. Show Answer Correct Answer: C) Spliceosome. 11. Which chemical group do amino acids contain that carbs and lipids do not? A) Hydroxyl. B) Amino. C) Carboxyl. D) Methyl. Show Answer Correct Answer: B) Amino. 12. What is the three base sequence of mRNA that codes for a single amino acid? A) Anticodon. B) Codon. C) Protein. D) None of above. Show Answer Correct Answer: B) Codon. 13. What is the complementary tRNA anticodon to the following mRNA codon: AUG A) UAC. B) TAC. C) ATG. D) AAC. Show Answer Correct Answer: A) UAC. 14. Which does NOT affect the level of enzyme activity (but does affect rate of reaction)? A) Temperature. B) PH. C) Enzyme concentration. D) Substrate concentration. Show Answer Correct Answer: C) Enzyme concentration. 15. Plants need ..... for photosynthesis A) Oxygen. B) Soil. C) Carbon dioxide. D) Sugar. Show Answer Correct Answer: C) Carbon dioxide. 16. Which of the following is a primary way in which proteins are used in the body? A) Proteins form a layer of insulation. B) Proteins help the body lose weight. C) Proteins provide materials for growth and repair. D) Proteins provide a quick energy source. Show Answer Correct Answer: C) Proteins provide materials for growth and repair. 17. Changing the pH alters the ..... of the enzyme, which then affects protein solubility and may change the shape of the molecule. A) Charge. B) Stress. C) Speed. D) Alignment. Show Answer Correct Answer: A) Charge. 18. Collisions are the result of ..... of the substrate and enzyme. Successful collisions are ones in which the substrate and active site correctly ..... A) Random movements, align. B) Repulsion, repel. C) Cooling, attract. D) Denaturation, match up. Show Answer Correct Answer: A) Random movements, align. 19. Units of heat that measure the energy used by the body and the energy that foods supply to the body. A) Nutrients. B) Calories. C) Appetite. D) Nutrition. Show Answer Correct Answer: B) Calories. 20. Sickle Cell AnemiaSequence for Normal HemoglobinDNA Sequence ATGGTG CAC CTG ACT CCT GAG GAG AAG TCT GCC GTT ACTAmino Acid Seq.STARTValHisLeuThrProGluGluLysSerAlaValThe Sequence for Sickle Cell HemoglobinDNA Sequence ATGGTG CAC CTG ACT CCT GTG GAG AAG TCT GCC GTT ACTAmino Acid Seq.STARTValHisLeuThrProValGluLysSerAlaValWhat mRNA would be transcribed from the normal hemoglobin DNA? A) TAC CAC GTG GAC TGA GGA CAC CTC TTC AGA CGG CAA TGA. B) UAC CAC GUC GAC UGA GGA CUC CUC UUC AGA CGG CAA UGA. C) UAC CAC GUG GAC UGA GGA CAC CUC UUC AGA CGG CAA UGA. D) TAC CAC GTC GAC TGA GGA CTC CUC TTC AGA CGG CAA TGA. Show Answer Correct Answer: B) UAC CAC GUC GAC UGA GGA CUC CUC UUC AGA CGG CAA UGA. ← PreviousNext →Related 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 9Molecular Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books