This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 48 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 48 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What type of organic molecules are enzymes? A) Carbohydrates. B) Lipids. C) Nucleic acids. D) Proteins. Show Answer Correct Answer: D) Proteins. 2. Mutations can be..... A) Harmful. B) Beneficial. C) Neutral. D) All of the Above. Show Answer Correct Answer: D) All of the Above. 3. Which of the following leads to disruption of nucleosomal structure? A) Acetylation. B) Carboxylation. C) Phosphorylation. D) Methylation. Show Answer Correct Answer: D) Methylation. 4. Which is NOT an organic carbon compound? A) Carbon dioxide. B) Carbohydrates. C) DNA. D) Cholesterol. Show Answer Correct Answer: A) Carbon dioxide. 5. Which of the following plasma membrane receptors activate signaling pathways usually by forming molecular dimers that result in protein phosphorylation reactions upon binding of their specific ligand? A) G protein-coupled receptors. B) Receptor tyrosine kinases. C) Ligand receptors. D) None of above. Show Answer Correct Answer: B) Receptor tyrosine kinases. 6. A short sequence of nucleotides reads GGACAGAGCGCAGACGA. In which type of molecule could this sequence be found? A) DNA molecule only. B) Both in a DNA and an RNA molecule. C) RNA molecule only. D) In double-stranded DNA only. Show Answer Correct Answer: B) Both in a DNA and an RNA molecule. 7. Guanine always hydrogen bonds with Cytosine. This is an example of: A) Contemplation Proclamation Perspiration. B) Confusatory Base Maturation. C) Compligatory Nitrogenase. D) Complementary Base Pairing. Show Answer Correct Answer: D) Complementary Base Pairing. 8. The codon is found on what structure? A) MRNA. B) TRNA. C) RRNA. D) DNA. Show Answer Correct Answer: A) MRNA. 9. What is Taxonomy? A) A system of existences. B) The science of biological classification. C) Systems help to clarify relationships among organisms. D) The study of biological diversity and its evolution. Show Answer Correct Answer: B) The science of biological classification. 10. Where does cellular respiration take place in the cell? A) Cell Membrane. B) Nucleus. C) Mitochondria. D) Vacuole. Show Answer Correct Answer: C) Mitochondria. 11. GENERAL: A nucleic acid that is composed of a phosphate, ribose sugar, and one of four nitrogen bases. A) STP. B) ATP. C) DNA. D) RNA. Show Answer Correct Answer: D) RNA. 12. A start codon is A) A sequence of RNA. B) A protein. C) An enzyme. D) The last thing to be transcribed. Show Answer Correct Answer: A) A sequence of RNA. 13. A nucleotide does NOT contain A) A sugar. B) Polymerase. C) A nitrogen base. D) A phosphate group. Show Answer Correct Answer: B) Polymerase. 14. Which is correct about the wavelengths and colors of visible light? A) Red 400-700nm violet. B) Red 200-1000nm violet. C) Violet 400-700nm red. D) Violet 200-1000nm red. Show Answer Correct Answer: C) Violet 400-700nm red. 15. All plants are made of cells. This was discovered by..... A) Matthias Schleiden. B) Rudolf Virchow. C) Robert Hooke. D) Aristotle. Show Answer Correct Answer: A) Matthias Schleiden. 16. What occurs during DNA replication? A) DNA polymerase separates the two DNA strands. B) DNA molecules containing nucleotides from the original molecule are produced. C) Adenine forms a base pair with either thymine or uracil. D) New bases attach to the original sugar-phosphate backbone. Show Answer Correct Answer: B) DNA molecules containing nucleotides from the original molecule are produced. 17. Which is the mRNA molecule that would be transcribed from this DNA template:TGGCAAGTACGT A) ACCGTTCATGCA. B) UGGCAAGUACGU. C) UCCGUUCUUGCU. D) ACCGUUCAUGCA. Show Answer Correct Answer: D) ACCGUUCAUGCA. 18. Ringworm is a skin infection caused by a fungus that lives in warm, moist conditions. Which statement is true about a ringworm infection A) It spreads by biting insects. B) It spreads by coughing and sneezing. C) It spreads by using towels that belong to an infected person. D) It spreads by sharing food with an infected person. Show Answer Correct Answer: C) It spreads by using towels that belong to an infected person. 19. A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture? A) DNA ligase. B) Nucleotides. C) DNA polymerase III. D) Okazaki fragments. Show Answer Correct Answer: A) DNA ligase. 20. Which is the correct chemical equation for CELLULAR RESPIRATION? A) Glucose (Sugar) + Oxygen --> Carbon Dioxide + Water + ATP (Energy). B) ATP (Energy) + Oxygen --> Carbon Dioxide + Water + Glucose (Sugar). C) Glucose (Sugar) + Carbon Dioxide --> Oxygen + Water + ATP (Energy)Glucose (Sugar) + Carbon Dioxide --> Oxygen + Water + ATP (Energy). D) Glucose (Sugar) + Water + Oxygen --> Carbon Dioxide + Oxygen + ATP (Energy). Show Answer Correct Answer: A) Glucose (Sugar) + Oxygen --> Carbon Dioxide + Water + ATP (Energy). ← 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