This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 4 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which nutrient should be consumed after intense workouts or games for recovery of damaged muscle tissue? A) Fat. B) Carbohydrate. C) Water. D) Protein. Show Answer Correct Answer: D) Protein. 2. What is the location in the cell for translation? A) Chloroplast. B) Ribosome. C) Mitochondria. D) Nucleus. Show Answer Correct Answer: B) Ribosome. 3. If a solvent moves 8 cm up a piece of chromatography paper and a pigment moves 5 cm, what is the piment's retention factor (Rf)? A) 0.63. B) 0.40. C) 0.16. D) 1.60. Show Answer Correct Answer: A) 0.63. 4. For which discovery about DNA do Watson and Crick receive credit? A) The amount of adenine equals the amount of thymine in an organism. B) The shape of DNA is a double helix. C) Phosphate-pentose bonding along the nucleotide backbone is covalent. D) DNA is the molecule that genes are made of. Show Answer Correct Answer: B) The shape of DNA is a double helix. 5. Which is true of DNA? A) Bases are A, T, C, G. B) Sugar is ribose. C) It is single stranded. D) It is short. Show Answer Correct Answer: A) Bases are A, T, C, G. 6. Which defines a codon in DNA or mRNA? A) Pair of nucleic acid and sugar. B) Pair of phosphate and sugar. C) Three-base code. D) Two-base code. Show Answer Correct Answer: C) Three-base code. 7. Which is most likely a potential high risk health problem for someone who consumes a diet high in sugar and fat and low in protein and fiber? A) Lung cancer. B) Stomach ulcers. C) Blindness. D) Obesity. Show Answer Correct Answer: D) Obesity. 8. Which team of scientists ultimately discovered the double-helical structure of DNA and what was their technique? A) Watson&Crick, X-ray diffraction. B) Watson&Crick, cardboard models. C) Franklin&Wilkins, cardboard models. D) Franklin&Wilkins, X-ray diffraction. Show Answer Correct Answer: B) Watson&Crick, cardboard models. 9. Which process uses oxygen and food molecules to produce energy for animal cells. A) Digestion. B) Photosynthesis. C) Cellular respiration. D) Glycolysis. Show Answer Correct Answer: C) Cellular respiration. 10. In which year was chemical hypothesis proposed A) 1972. B) 1963. C) 1967. D) 1973. Show Answer Correct Answer: B) 1963. 11. Which of the following processes produces CO2?I. PhotosynthesisII. Alcohol (ethanol) fermentationIII. Lactic acid production A) I only. B) II only. C) I and III only. D) I, II and III. Show Answer Correct Answer: B) II only. 12. The molecule that copies the genetic instructions from DNA is A) RRNA. B) MRNA. C) TRNA. D) None of above. Show Answer Correct Answer: B) MRNA. 13. Which of the following best describes the flow of information in a cell? A) DNA $\rightarrow$ mRNA $\rightarrow$ proteintrait. B) MRNA $\rightarrow$ DNA $\rightarrow$ tRNAtrait. C) TRNA $\rightarrow$ mRNA $\rightarrow$ proteintrait. D) Protein $\rightarrow$ DNA $\rightarrow$ mRNAtrait. Show Answer Correct Answer: A) DNA $\rightarrow$ mRNA $\rightarrow$ proteintrait. 14. The process in which an RNA polymerase molecule assembles a mRNA molecule whose nucleotide sequence is complementary to the DNA sequence is called A) Translation. B) Transcription. C) PCR. D) Gene amplification. Show Answer Correct Answer: B) Transcription. 15. Which best describes a result of a well-balanced diet? A) Elevation of the heart rate. B) Accumulation of fat reserves. C) Regulation of blood sugar levels. D) Reduction in energy production during respiration. Show Answer Correct Answer: C) Regulation of blood sugar levels. 16. Uncontrollable cell growth is known as ..... A) Obesity. B) Cancer. C) Diabetes. D) Hepatitis. Show Answer Correct Answer: B) Cancer. 17. TRANSLATION: Smaller segments of clover leaf shaped RNA that transport amino acids: A) Messenger RNA. B) Transfer RNA. C) Ribosomal RNA. D) Okazaki Fragments. Show Answer Correct Answer: B) Transfer RNA. 18. Where does DNA replication take place? A) Golgi Body. B) Nucleus. C) Cytoplasm. D) Ribosome. Show Answer Correct Answer: B) Nucleus. 19. Enzymes used in industry are commonly A) Unstable. B) Immobilized. C) Unconcentrated. D) Replaced after every catalysis reaction. Show Answer Correct Answer: B) Immobilized. 20. UAG, UGA, and UAA are stop codons. What does that mean? A) The replication of the DNA is complete. B) The building of the mRNA is complete. C) The building of the tRNA is complete. D) The building of the polypeptide is complete. Show Answer Correct Answer: D) The building of the polypeptide is complete. 21. These are the region of lac operon EXCEPT A) CAMP site. B) Operator. C) Promoter. D) LacZ, lacY and lacA. Show Answer Correct Answer: A) CAMP site. 22. These are the stop codon sequence EXCEPT A) UGA. B) UAA. C) UAG. D) AUG. Show Answer Correct Answer: D) AUG. 23. How do gene mutations contribute to evolution? A) Beneficial mutations are passed on to several members of a generation, quickly taking hold in a population. B) Unfavorable mutations have a more significant effect on genes than do favorable mutations, so they are spread through the population. C) Natural selection favors beneficial mutations, so they survive and are passed on to future generations. D) Beneficial and unfavorable mutations take hold in the population equally over numerous generations. Show Answer Correct Answer: C) Natural selection favors beneficial mutations, so they survive and are passed on to future generations. 24. The central dogma of biology states that information flows in one direction from A) Genes to nuclei to ribosomes. B) Ribosomes to proteins to DNA. C) Nuclei to RNA to cytoplasm. D) DNA to RNA to proteins. Show Answer Correct Answer: D) DNA to RNA to proteins. 25. The region of an operon where regulatory proteins bind is the A) Codon. B) RNA. C) Operator. D) Anticodon. Show Answer Correct Answer: C) Operator. 26. As temperature increases toward the optimal level, the kinetic energy of the enzyme and substrate ....., resulting in ..... collisions. A) Increases, more frequent. B) Increases, less frequent. C) Decreases, less frequent. D) Decreases, more frequent. Show Answer Correct Answer: A) Increases, more frequent. 27. Where in the cell does the first step of protein synthesis take occur? A) At the ribososmes. B) On the rough ER. C) In the cell membrane. D) In the nucleus. Show Answer Correct Answer: D) In the nucleus. 28. What is the difference between an intron and an exon? A) Introns are sections of mRNA that are not needed for protein synthesis. Exons are sections of mRNA that are needed for protein synthesis. B) Exons are sections of mRNA that had mutations which have been fixed. Introns are sections of mRNA that were fine with no mutations. C) Exons are sections of mRNA that are not needed for protein synthesis. Introns are sections of mRNA that are needed for protein synthesis. 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: A) Introns are sections of mRNA that are not needed for protein synthesis. Exons are sections of mRNA that are needed for protein synthesis. 29. Protein is broken down into ..... before they are asborbed into the small intestines. A) Fatty acids. B) Hydrochiloric. C) Amino acids. D) Citric acid. Show Answer Correct Answer: C) Amino acids. 30. 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. ← PreviousNext →Related QuizzesBiology QuizzesAgriculture QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books