This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 20 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Before the cell divides, what process needs to happen? A) Protein synthesis. B) Replication. C) Translation. D) Transcription. Show Answer Correct Answer: B) Replication. 2. ATTTGAGCC- OriginalATTGAGCC - MutatedThe example above is an example of a A) Insertion- Frameshift. B) Deletion- Substitution. C) Deletion -Frameshift. D) All of the above. Show Answer Correct Answer: C) Deletion -Frameshift. 3. How does a prokaryotic cell differ from a eukaryotic cell? A) A prokaryotic cell does not contain ribosomes. B) A prokaryotic cell does not contain genetic information. C) A prokaryotic cell does not have a cell wall. D) A prokaryotic cell does not have a nucleus. Show Answer Correct Answer: D) A prokaryotic cell does not have a nucleus. 4. The process of converting transcribed mRNA to protein A) Translation. B) Protein sysnthesis. C) Splicing. D) Transcription. Show Answer Correct Answer: A) Translation. 5. What is RNA Polymerase' role in epigenetics A) RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence. B) RNA polymerase is an enzyme that unzips DNA. C) RNA polymerase is a gene responsible for cancer. D) RNA polymerase is a protein that reads DNA. Show Answer Correct Answer: A) RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence. 6. The DNA strand that is transcribed is the A) Coding strand. B) Sense strand. C) Template strand. D) None of these is correct. Show Answer Correct Answer: C) Template strand. 7. When a plant cell goes through cell division, ..... A) The 2 new nuclei are separated by the cell membrane pinching off. B) 4 new cells are formed. C) A cell plate forms, dividing the 2 new nuclei. D) None of the above. Show Answer Correct Answer: C) A cell plate forms, dividing the 2 new nuclei. 8. -COOH is a ..... group A) Amine. B) Carbohydrate. C) Methyl. D) Carboxyl. Show Answer Correct Answer: D) Carboxyl. 9. In RNA, A bonds to A) U. B) C. C) T. D) G. Show Answer Correct Answer: A) U. 10. The parts of a gene that do NOT code for amino acids in a protein are called A) Introns. B) Codons. C) Anticodons. D) Exons. Show Answer Correct Answer: A) Introns. 11. Which of the following carries amino acids to ribosomes? A) Ribosomal RNA (rRNA) molecules. B) Transfer RNA (tRNA) molecules. C) Messenger RNA (mRNA) molecules. D) None of above. Show Answer Correct Answer: B) Transfer RNA (tRNA) molecules. 12. T5- The unpaired nucleotides produced by the action of restriction enzymes are referred to as A) Sticky end. B) Base sequence. C) Single strands. D) Restriction fragments. Show Answer Correct Answer: A) Sticky end. 13. C6H12O6 is the formula for A) Glucose. B) Ribose. C) Triglyceride. D) Amino acid. Show Answer Correct Answer: A) Glucose. 14. In eukaryotes, DNA is located in the A) Ribosome. B) Cell membrane. C) Cytoplasm. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 15. James Watson and Francis Crick built a model showing that the structure of DNA is like a twisted ladder called a double helix. What purpose does the double helix structure serve? A) The double helix shows that one strand of the DNA ladder is inherited from each parent. B) The sugars and phosphates that make up the sides of teh DNA ladder twist and curve to conserve space in the cell. C) The double helix is a random occcurance and DNA could just as easily be a straight single-stranded molecule. D) The pattern of complementary bases on each side of the DNA ladder ensures that exact copies of the DNA are made during replication. Show Answer Correct Answer: D) The pattern of complementary bases on each side of the DNA ladder ensures that exact copies of the DNA are made during replication. 16. Which enzyme is used to join nicks in the DNA strand? A) DNA ligase. B) DNA polymerase. C) Primase. D) Endonuclease. Show Answer Correct Answer: A) DNA ligase. 17. What elements do proteins always contain? A) C, H, N. B) C, H, O. C) C, H, N, P. D) C, H, O, N. Show Answer Correct Answer: D) C, H, O, N. 18. What are the subunits of DNA and their function? A) Nucleotides that store information. B) Monosaccharides that provide quick energy for the cell. C) Lipids that store energy and provide insulation. D) Proteins that provide the building blocks for the structural components of organisms. Show Answer Correct Answer: A) Nucleotides that store information. 19. What factor most affects the order of amino acids in a protein? A) The DNA located in the nucleus of the cell. B) The area in a cell where proteins are produced. C) The cell in which the protein is located. D) The amount of ATP available for the cell's use. Show Answer Correct Answer: A) The DNA located in the nucleus of the cell. 20. Protein synthesis is a process that uses DNA, RNA and ribosomes to build proteins, The protein are built from their building blocks. What are the building blocks of proteins called? A) Amino acids. B) Carbohydrates. C) Proteins. D) Nucleotides. Show Answer Correct Answer: A) Amino acids. 21. Which of the following is true about plasmids A) Small circular piece of DNA. B) Small circular piece of RNA. C) Located in bacteria. D) Small circular piece of DNA that is located in bacteria. Show Answer Correct Answer: D) Small circular piece of DNA that is located in bacteria. 22. Which statement best describes the primary function of DNA replication A) The ensure daughter cells have a complete copy of the DNA. B) To prevent mutations from occurring in cells. C) To provide genetic variation within specific organisms. D) To allow prokaryotic cells to undergo meiosis. Show Answer Correct Answer: A) The ensure daughter cells have a complete copy of the DNA. 23. Which enzyme is needed to start DNA replication? A) Ligase. B) Primase. C) Topoisomerase. D) DNA Polymerase. Show Answer Correct Answer: B) Primase. 24. What is the function of a cell's ribosomes? A) To remove wastes. B) To release energy. C) To make food. D) To make proteins. Show Answer Correct Answer: D) To make proteins. 25. A 4 polypeptide globular protein in red blood cells. Binds oxygen in lungs and releases it in tissues. A) Integrin. B) Lysozyme. C) Rubisco. D) Hemoglobin. Show Answer Correct Answer: D) Hemoglobin. 26. Which of the following is the complementary mRNA strand for this strand of DNA? ATT-GCG-AGT A) UAA-GCG-UCA. B) UAA-CGC-TCA. C) UAA-CGC-AGT. D) UAA-CGC-UCA. Show Answer Correct Answer: D) UAA-CGC-UCA. 27. Arrange the steps for transcription in decreasing order. A) Termination - initiation -elongation. B) Termination - elongation - initiation. C) Initiation - termination - elongation. D) Initiation - elongation - termination. Show Answer Correct Answer: B) Termination - elongation - initiation. 28. What mutation has occurred here? T-G-A-C-C-AT-G-A-G-C-A A) Frameshift. B) Substitution. C) Deletion. D) Insertion. Show Answer Correct Answer: B) Substitution. 29. How do cells obtain the energy and materials necessary for the work they do? A) They release nitrogen. B) They take in nutrients. C) They move around in the body. D) They produce oxygen and carbon dioxide. Show Answer Correct Answer: B) They take in nutrients. 30. A base pair substitution can result in all of the following except ..... A) Nonsense mutation. B) Frameshift Mutation. C) Missense mutation. D) Silent Mutation. Show Answer Correct Answer: B) Frameshift Mutation. ← 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