This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 30 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which sequence of DNA bases would pair with this partial strandATG TGA CAG A) ATG TGA CAG. B) TAC ACT GTC. C) GTA AGT GAC. D) CAT TCA CTG. Show Answer Correct Answer: B) TAC ACT GTC. 2. Why are insertion and deletion (frameshift) mutations so harmful? A) They change all of the codons from the mutation on down the line, which changes the amino acid sequence. B) They insert things that an organism doesn't need. C) They often delete things that organisms need. D) Insertion and deletions are not any more harmful than substitution mutations. Show Answer Correct Answer: A) They change all of the codons from the mutation on down the line, which changes the amino acid sequence. 3. Process in which amino acids are assembled into proteins at the ribosome? A) Translation. B) Transcription. C) Meiosis. D) Replication. Show Answer Correct Answer: A) Translation. 4. Before the cell divides, what process needs to happen? A) Transcription. B) Translation. C) Replication. D) Protein synthesis. Show Answer Correct Answer: C) Replication. 5. 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. 6. 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. 7. The process of converting transcribed mRNA to protein A) Transcription. B) Translation. C) Protein sysnthesis. D) Splicing. Show Answer Correct Answer: B) Translation. 8. 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 protein that reads DNA. D) RNA polymerase is a gene responsible for cancer. Show Answer Correct Answer: A) RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence. 9. 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. 10. 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. 11. -COOH is a ..... group A) Amine. B) Methyl. C) Carboxyl. D) Carbohydrate. Show Answer Correct Answer: C) Carboxyl. 12. In RNA, A bonds to A) T. B) U. C) C. D) G. Show Answer Correct Answer: B) U. 13. The parts of a gene that do NOT code for amino acids in a protein are called A) Introns. B) Exons. C) Codons. D) Anticodons. Show Answer Correct Answer: A) Introns. 14. 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. 15. 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. 16. C6H12O6 is the formula for A) Glucose. B) Ribose. C) Amino acid. D) Triglyceride. Show Answer Correct Answer: A) Glucose. 17. In eukaryotes, DNA is located in the A) Cytoplasm. B) Nucleus. C) Cell membrane. D) Ribosome. Show Answer Correct Answer: B) Nucleus. 18. 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. 19. Which enzyme is used to join nicks in the DNA strand? A) Primase. B) DNA polymerase. C) DNA ligase. D) Endonuclease. Show Answer Correct Answer: C) DNA ligase. 20. What elements do proteins always contain? A) C, H, O, N. B) C, H, O. C) C, H, N, P. D) C, H, N. Show Answer Correct Answer: A) C, H, O, N. ← PreviousNext →Related QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular 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