This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 40 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 40 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of diet best contributes to a healthy lifestyle? A) A diet high in fat and protein. B) A diet high in fruits, vegetables and fat. C) A diet high in carbohydrates and vegetables. D) A diet high in fruits, vegetables and lean protein. Show Answer Correct Answer: D) A diet high in fruits, vegetables and lean protein. 2. How do the leading, and the lagging strands differ? A) The leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. B) The leading strand is synthesized at twice the rate of the lagging strand. C) The leading strand is synthesized in short fragments that are ultimately stitched together, whereas the lagging strand is synthesized continuously. D) The leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5? end. Show Answer Correct Answer: A) The leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. 3. In an analysis of the nucleotide composition of DNA, which of the following will be found? A) A = C. B) A = G and C = T. C) A + C = G + T. D) G + C = T + A. Show Answer Correct Answer: C) A + C = G + T. 4. Which scientists built a 3-D model of the DNA double helix? A) Hershey and Chase. B) Watson and Crick. C) Chargaff and Franklin. D) Griffith and Avery. Show Answer Correct Answer: B) Watson and Crick. 5. Repetitive sequences of DNA on the ends of chromosomes (TTAGGG) that get smaller with each replication A) Telomeres. B) Telomerase. C) Okazaki fragments. D) Primer. Show Answer Correct Answer: A) Telomeres. 6. Which molecule created by plants is broken down by the human body to provide energy for its life processes? A) Water. B) Oxygen. C) Glucose. D) Carbon dioxide. Show Answer Correct Answer: C) Glucose. 7. The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following? A) The same codons in different organisms translate into the different amino acids. B) A gene from an organism can theoretically be expressed by any other organism. C) All organisms have experienced convergent evolution. D) DNA was the first genetic material. Show Answer Correct Answer: B) A gene from an organism can theoretically be expressed by any other organism. 8. The shape of a DNA molecule is a: A) Single strand. B) Twisted cone. C) Double helix. D) Linear helix. Show Answer Correct Answer: C) Double helix. 9. Acridine orange is a ..... A) DNA Intercalating agent. B) Ligation agents. C) DNA polymerase. D) None of the above. Show Answer Correct Answer: A) DNA Intercalating agent. 10. If below is the wild-type DNA sequence, which one shows a point mutation?5'-ATTCGC-3' A) 5' - AATTCGC - 3'. B) 5'- ATCCGC - 3'. C) 5' - ATCGC - 3'. D) 5' - ATTCGC - 3'. Show Answer Correct Answer: B) 5'- ATCCGC - 3'. 11. Hydrochloric acid is secreted in the ..... . A) Oesophagus. B) Stomach. C) Large intestine. D) Small intestine. Show Answer Correct Answer: B) Stomach. 12. ..... are produced when DNA from another species is inserted into the genome of an organism, which then begins to produce the protein encoded on the recombinant DNA. A) Vectors. B) Plasmids. C) Transgenic organisms. D) Gene guns. Show Answer Correct Answer: C) Transgenic organisms. 13. Translation is the process where A) MRNA is created in the Nucleus. B) MRNA is decoded to form a protein. C) Glucose molecules are made. D) Is where lipids are synthesised. Show Answer Correct Answer: B) MRNA is decoded to form a protein. 14. Anticodons on tRNA pair with A) MRNA codons. B) TRNA condons. C) DNA codons. D) Amino acids. Show Answer Correct Answer: A) MRNA codons. 15. Cells secrete proteins, often as enzymes, that have been engineered or directed by the DNA in the nucleus. Which processes are involved in protein synthesis? A) Transfer to RNA, then to amino acids. B) Transcription into RNA, then to amino acids. C) Replication of DNA, then transcription into enzymes. D) Translation into RNA, then replication into DNA. Show Answer Correct Answer: B) Transcription into RNA, then to amino acids. 16. The entire collection of genes within human cells is referred to as the ..... A) Human genome. B) Karyotype. C) Pedigree. D) Gene map. Show Answer Correct Answer: A) Human genome. 17. Which is the most associated with the building and repair of cells, organelles, and tissues? A) Fiber. B) Lipid. C) Sugar. D) Protein. Show Answer Correct Answer: D) Protein. 18. Which of the following is NOT a component of nucleic acids? A) Nitrogen bases. B) Sugar. C) Phosphate. D) Protein. Show Answer Correct Answer: D) Protein. 19. Which part of the plant captures light energy used in photosynthesis? A) Guard cells. B) Chloroplast. C) Roots. D) Mitochondria. Show Answer Correct Answer: B) Chloroplast. 20. What makes up the DNA? A) TRNA. B) Nucleotide. C) Amino acids. D) MRNA. Show Answer Correct Answer: B) Nucleotide. ← 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