This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 2 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the name for this RNA --> proteins? A) Translation. B) Transcription. C) Replication. D) None of these. Show Answer Correct Answer: A) Translation. 2. What organelle surrounds and supports plant cells? A) Cell Membrane. B) Cell Wall. C) Nucleus. D) Golgi Complex. Show Answer Correct Answer: B) Cell Wall. 3. Carbohydrates are broken down into smaller molecules for what purpose? A) To form cell membranes. B) To form muscle. C) To transmit genetic information. D) To provide energy. Show Answer Correct Answer: D) To provide energy. 4. REPLICATION:DNA Replication is: A) Is Semi-conservative. B) Is a double helix. C) Has no hydrogen Bonds. D) Makes a protein. Show Answer Correct Answer: A) Is Semi-conservative. 5. Under ..... light, a plant would grow well because chlorophyll would ..... the photons. A) Red, reflect. B) Green, reflect. C) Red, absorb. D) Green, absorb. Show Answer Correct Answer: C) Red, absorb. 6. The codon chart contains what information? A) Amino acids. B) DNA sequences. C) Protein chains. D) Sugars. Show Answer Correct Answer: A) Amino acids. 7. The two polynucleotide chains of DNA are held together by bonds between A) Amino acids. B) Sugars and phosphates. C) Complementary bases. D) Adenine and uracil. Show Answer Correct Answer: C) Complementary bases. 8. Cytosine always pairs with A) Adenine. B) Thymine. C) Uracil. D) Guanine. Show Answer Correct Answer: D) Guanine. 9. Further processing of eukaryotic mRNA includes A) Splicing and tailing. B) Caping and tailing. C) Caping, tailing and splicing. D) Splicing only. Show Answer Correct Answer: C) Caping, tailing and splicing. 10. The site where transcription begins A) Rho factor. B) In nucleus. C) Promoter. D) Template. Show Answer Correct Answer: C) Promoter. 11. How to start or initiate the lac operon function? A) Glucose is available, lactose not available. B) Sucrose not available, pentose is available. C) Pentose not available, sucrose is available. D) Glucose not available, lactose is available. Show Answer Correct Answer: D) Glucose not available, lactose is available. 12. Meselson and Stahl conducted experiments using the isotopes 14N and 15N which showed that DNA replication is semi-conservative. What would they have observed about the distribution of isotopes in the DNA after one round of replication if DNA replication was conservative rather than semi-conservative? A) Only 14N DNA. B) Only 15N DNA. C) All DNA half 14N and half 15N. D) Half the DNA with only 14N and half with only 15N. Show Answer Correct Answer: D) Half the DNA with only 14N and half with only 15N. 13. What will be the sequence on the mRNA molecule that is produced when the DNA base sequence ACTGATGCC is transcribed? A) ACTGATGCC. B) ACUGAUGCC. C) TGACTACGG. D) UGACUACGG. Show Answer Correct Answer: D) UGACUACGG. 14. When people exercise and limit fluid intake, the kidneys reduce the amount of water taken from the blood to maintain balance. What best explains why less water is removed? A) Homeostasis. B) Cellular Respiration. C) Fermentation. D) Diffusion. Show Answer Correct Answer: A) Homeostasis. 15. What do the lines between the A-T and G-C pairs represent? A) Ionic bonds. B) Hydrogen bonds. C) Covalent bonds. D) Van der walls forces. Show Answer Correct Answer: B) Hydrogen bonds. 16. In E. coli, there is a mutation in a gene called dnaB that alters the DNA helicase that normally acts at the origin. Which of the following would you expect as a result of this mutation? A) Replication will occur via RNA polymerase alone. B) The DNA will supercoil. C) No replication fork will be formed. D) No proofreading will occur. Show Answer Correct Answer: C) No replication fork will be formed. 17. Which is true about active transport? A) It requires energy. B) It does not require energy. C) It moves substances down the concentration gradient. D) It moves material from high to low concentration. Show Answer Correct Answer: A) It requires energy. 18. ..... is important characteristics of IS sequence 5' - 3' end 5 - 11bps are generated from target site DNA A) Direct repeat. B) Indirect repeat. C) Inverted repeat. D) None of above. Show Answer Correct Answer: A) Direct repeat. 19. Sickle Cell Anemia is caused by a "point" mutation. Which of the following correctly describes this type of mutation? A) A nucleotide or group of nucleotides is inserted into the wrong location in the DNA. This changes the order in which the nucleotides are "read" and results in the synthesis of an incorrect amino acid sequence. B) A nucleotide or group of nucleotides is deleted from the DNA. This changes the order in which the nucleotides are "read" and results in the synthesis of an incorrect amino acid sequence. C) An incorrect nucleotide is substituted for the correct nucleotide. This changes one codon in the gene sequence. This results in a change in one amino acid in the protein. This change in one amino acid changes the overall shape/function of the protein. D) Several incorrect nucleotides are substituted for their correct counterparts. This changes several of the amino acids in the protein and results in a protein that is misshapen and not functional. Show Answer Correct Answer: C) An incorrect nucleotide is substituted for the correct nucleotide. This changes one codon in the gene sequence. This results in a change in one amino acid in the protein. This change in one amino acid changes the overall shape/function of the protein. 20. A process in which DNA has the unique ability to make an exact copy of itself. A) Replication. B) Translation. C) Transcription. D) None of above. Show Answer Correct Answer: A) Replication. ← PreviousNext →Related QuizzesBiology QuizzesMolecular Biology Quiz 1Molecular 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