This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 22 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The function of $\beta$ subunit of polymerase isTemplate binding Catalytic binding Promoter binding Cation binding A) Cation binding. B) Promoter binding. C) Catalytic binding. D) Template binding. Show Answer Correct Answer: C) Catalytic binding. 2. Which of the following one is a chemical agent that can cause mutation? A) 5-bromouracil. B) Human Papiloma virus. C) X-rays. D) UV. Show Answer Correct Answer: A) 5-bromouracil. 3. If a strand reads:3' A A A T T T C 5'The matching strand would read..... A) 3' T T T A A A G 5'. B) 5' A A A T T T C 3'. C) 5' T T T A A A G 3'. D) 3' U U U A A A G 5'. Show Answer Correct Answer: C) 5' T T T A A A G 3'. 4. Name of the enzyme that cut out the intron A) Rho dependent. B) Rho independent. C) Splicosome. D) RNA polymerase. Show Answer Correct Answer: C) Splicosome. 5. RNA is different from DNA, because RNA: A) Is a single strand. B) Contains the sugar ribose. C) Replaces Thymine for Uracil. D) All of these answers. Show Answer Correct Answer: D) All of these answers. 6. What is the name for when the RNA info is read and turned into a protein? A) Transcription. B) Transcribation. C) Replication. D) Translation. Show Answer Correct Answer: D) Translation. 7. When a person is extremely cold, his or her muscles will use energy to spasm and generate heat, the act of shivering. Which conclusion best explains why the body does this? A) The body loses mass through shivering so that it can better maintain homeostasis. B) The body maintains homeostasis by releasing water to maintain the muscles' temperature. C) The body maintains homeostasis by keeping the body at a specific temperature. D) The body tricks the mind into thinking it is not cold so that it can maintain homeostasis. Show Answer Correct Answer: C) The body maintains homeostasis by keeping the body at a specific temperature. 8. The anticodon is found on what structure? A) RRNA. B) TRNA. C) DNA. D) MRNA. Show Answer Correct Answer: B) TRNA. 9. Which amino acids would be added to a polypeptide if the mRNA codons were CCC-GUC-AUA? A) Proline-valine-isoleucine. B) Glycine-glutamine-tyrosine. C) Proine-alanine-threonine. D) Leucine-cysteine-asparagine. Show Answer Correct Answer: A) Proline-valine-isoleucine. 10. Which of the following does NOT describe the structure of DNA? A) Double helix. B) Contains adenine-guanine pairs. C) Sugar-phosphate backbone. D) Nucleotide polymer. Show Answer Correct Answer: B) Contains adenine-guanine pairs. 11. You are given 100.0 ml of a 2.0 M solution of KOH. What would be the molarity of the solution if it is diluted to a volume of 1000 ml? A) 2 M. B) 0.002 M. C) 0.2 M. D) 0.02 M. Show Answer Correct Answer: C) 0.2 M. 12. Identify the SUBSTITUTION mutation from the following DNA sequence: ATG CCA AAT A) ATC CA AT. B) ATG CCT AAA T. C) ATG CCA AAT. D) ATG TCA AAT. Show Answer Correct Answer: D) ATG TCA AAT. 13. The bonds that hold the two strands of DNA together come from A) The attraction of phosphate groups for each other. B) Strong bonds between nitrogen bases and the sugar-phosphate backbone. C) Weak hydrogen bonds between nitrogen bases. D) Carbon-to-carbon bonds in the sugar portion of the nucleotids. Show Answer Correct Answer: C) Weak hydrogen bonds between nitrogen bases. 14. DNA strand has the following bases AAGCCA what are the bases on the complementary strand A) GGCTTA. B) CCAGGT. C) TTGGGA. D) TTCGGT. Show Answer Correct Answer: D) TTCGGT. 15. What is the maximum number of bonds a carbon atom can form with another atoms? A) 3. B) 2. C) 6. D) 4. Show Answer Correct Answer: D) 4. 16. The sequence of amino acids forming a polypeptide is known as the ..... structure of a protein. A) Primary. B) Tertiary. C) Quaternary. D) Secondary. Show Answer Correct Answer: A) Primary. 17. The process by which the genetic code of DNA is copied into a strand of RNA is called A) Replication. B) Transformation. C) Translation. D) Transcription. Show Answer Correct Answer: D) Transcription. 18. ..... is thought to block the "accidental" transcription of "turned off" genes. A) SmRNA. B) Methylation of DNA. C) Dicer. D) All of these are correct. Show Answer Correct Answer: B) Methylation of DNA. 19. According to Chargaff's rules, if DNA of a species contains 20% thymine, what percent of guanine will it contain? A) 30%. B) 20%. C) 40%. D) 80%. Show Answer Correct Answer: A) 30%. 20. Which is NOT scientific evidence for health risks associated with trans fats: A) Increased coronary heart disease. B) Increased HDL cholesterol. C) Increased coronary events (e.g. heart attacks). D) Increased LDL cholesterol. Show Answer Correct Answer: B) Increased HDL cholesterol. 21. Which is not a benefit of lactose-free dairy products? A) Lower calorie content. B) Suitable for lactose intolerant people. C) Smoother consistency in ice cream. D) Sweeter taste for same amount of sugar. Show Answer Correct Answer: A) Lower calorie content. 22. In translation, the language of the bases is turned into the language of ..... A) Nucleic acids. B) Amino acids. C) Proteins. D) Nucleotides. Show Answer Correct Answer: B) Amino acids. 23. Flower color is an inherited trait. On a molecular level, which cellular function is responsible for flower color? A) Photosynthesis. B) Respiration. C) Nitrification. D) Protein synthesis. Show Answer Correct Answer: D) Protein synthesis. 24. When DNA is copied, the new DNA has A) One molecule with 2 old strands and one molecule with 2 new strands. B) Each molecule has one old strand and one new strand. C) Each molecule has sections from the old strand and sections from the new strand. D) One molecule contains thymine and one molecule contains uracil. Show Answer Correct Answer: B) Each molecule has one old strand and one new strand. 25. Translation is the process of: A) Making mRNA from DNA. B) Assembling a protein from RNA. C) Making DNA. D) "Unzipping" the molecule of DNA. Show Answer Correct Answer: B) Assembling a protein from RNA. 26. This enzyme is capable of breaking Hydrogen bonds found between the bases of DNA A) Exonuclease. B) DNA Helicase. C) Topoisomerase. D) DNA Polymerase. Show Answer Correct Answer: B) DNA Helicase. 27. Which is NOT a polymer of nucleotides? A) DNA. B) MRNA. C) ATP. D) TRNA. Show Answer Correct Answer: C) ATP. 28. Which is NOT a correct comparison between water and methane? A) Water has a higher heat capacity. B) Water freezes at a lower temperature. C) Water has a higher boiling point. D) Water has stronger intermolecular forces. Show Answer Correct Answer: B) Water freezes at a lower temperature. 29. STRUCTURE: One difference between RNA and DNA is - A) RNA has thymine where DNA has ademine. B) DNA is single stranded where RNA is double stranded. C) DNA is made in the nucleus where RNA is made in the ribosomes. D) RNA is single stranded where DNA is double stranded. Show Answer Correct Answer: D) RNA is single stranded where DNA is double stranded. 30. RNA polymerase adds nucleotides to a new RNA chain that are complementary to A) The template strand. B) MRNA. C) Coding strand. D) Anticodon. Show Answer Correct Answer: A) The template strand. ← 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books