This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 5 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Some yeast genes can be replaced by human genes that then continue to produce the same human proteins in the yeast cells. Which statement helps to explain this evidence? A) The DNA of yeast and humans is identical. B) Yeast and humans have the same number of chromosomes. C) The genetic code is universal. D) Yeast and humans are both eukaryotes. Show Answer Correct Answer: C) The genetic code is universal. 2. Which of the following is the correct equation for PHOTOSYNTHESIS? A) 6CO2 + 6H2O --> 6O2 + C6H12O6. B) 6CO2 + C6H12O6 + 6H2O --> O2. C) 6O2 + 6H2O --> 6CO2 + C6H12O6. D) C6H12O6 + 6O2 ---> 6H2O + 6CO2. Show Answer Correct Answer: A) 6CO2 + 6H2O --> 6O2 + C6H12O6. 3. HISTORY: Two time Nobel Prize winner who suggested a structure for DNA - but got it completely wrong..... A) James Watson. B) Francis Crick. C) Rosalind Franklin. D) Linnus Pauling. Show Answer Correct Answer: D) Linnus Pauling. 4. In bacteria, transposons jump from A) Plasmid DNA to chromosomal RNA. B) Chromosomal DNA to plasmid DNA. C) Plasmid RNA to chromosomal DNA. D) Chromosomal RNA to plasmid DNA. Show Answer Correct Answer: B) Chromosomal DNA to plasmid DNA. 5. Because some amino acids can be coded for by multiple codons, this type of mutation is possible. A) Nonsense Mutation. B) Missense Mutation. C) Degenerate Mutation. D) Silent Mutation. Show Answer Correct Answer: D) Silent Mutation. 6. If a DNA molecule is 18% Guanine which of the following is correct A) 18% cytosine, 32% adenine, 32% thymine. B) 32% cytosine, 18% adenine, 32% thymine. C) 18% cytosine, 64% adenine, 64% thymine. D) 32% cytosine, 32% adenine, 18% thymine. Show Answer Correct Answer: A) 18% cytosine, 32% adenine, 32% thymine. 7. Which molecule carries the protein code from the nucleus to the ribosome? A) TRNA. B) RRNA. C) MRNA. D) DNA. Show Answer Correct Answer: C) MRNA. 8. In cellular respiration, approximately 38% of the energy contained in glucose is released for an organism to use carrying out life processes. Which best explains what happens to the remaining 62% of the energy contained in glucose? A) The energy is used to start the process of cellular respiration when more glucose is consumed by the organism. B) The energy is used to convert leftover glucose into protein to be stored by the cells of the organism. C) The energy is stored by the cells and released later when needed by the organim. D) The energy is converted to thermal energy, which provides heat to the organism. Show Answer Correct Answer: D) The energy is converted to thermal energy, which provides heat to the organism. 9. Which would NOT be a part of production of lactose-free products? A) Filter milk over enzyme immobilized in mesh. B) Hydrolysis of lactase. C) Hydrolysis of lactose. D) Adding digestive enzyme to dairy products. Show Answer Correct Answer: B) Hydrolysis of lactase. 10. What process forms triglycerides? A) Evaporation. B) Condensation. C) Hydrolysis. D) Glycolysis. Show Answer Correct Answer: B) Condensation. 11. What is the function of telomeres on a DNA strand? A) They are used as a recognition site for DNA helicase to bond & begin "unzipping" the strand for replication. B) They bond the Okazaki fragments together forming a continuous replication of DNA on the lagging strand. C) When cell continually replicate, the DNA gets shorter so by adding telomeres to the ends of DNA, they extend the life of a cell. D) They help untangle the DNA strand prior to DNA helicase's arrival to unzip the DNA strand, readying it for replication. Show Answer Correct Answer: C) When cell continually replicate, the DNA gets shorter so by adding telomeres to the ends of DNA, they extend the life of a cell. 12. The enzyme catalase hydrolyzes H2O2 (hydrogen peroxide) into what products? A) H2O + O2. B) H2O2 + O2. C) CO2 + O2. D) NH3 + O2. Show Answer Correct Answer: A) H2O + O2. 13. The addition of nucleotides to a growing mRNA strand is called A) Splicing. B) Frameshift. C) Elongation. D) Mutagen. Show Answer Correct Answer: C) Elongation. 14. Which nutrient should be consumed after intense workouts or games for recovery of damaged muscle tissue? A) Protein. B) Carbohydrate. C) Fat. D) Water. Show Answer Correct Answer: A) Protein. 15. What is the location in the cell for translation? A) Nucleus. B) Mitochondria. C) Ribosome. D) Chloroplast. Show Answer Correct Answer: C) Ribosome. 16. 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. 17. For which discovery about DNA do Watson and Crick receive credit? A) The shape of DNA is a double helix. B) DNA is the molecule that genes are made of. C) Phosphate-pentose bonding along the nucleotide backbone is covalent. D) The amount of adenine equals the amount of thymine in an organism. Show Answer Correct Answer: A) The shape of DNA is a double helix. 18. 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. 19. 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. 20. 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) Obesity. B) Blindness. C) Lung cancer. D) Stomach ulcers. Show Answer Correct Answer: A) Obesity. ← PreviousNext →Related QuizzesBiology QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9Molecular Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books