This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 7 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In which of the following would there NOT be a change in the amino acid sequence of the peptide coded for by this DNA? A) Deleting the first A from AAA. B) Changing CCG to GCG. C) Changing AAA to AAG. D) Changing TTC to ATC. Show Answer Correct Answer: C) Changing AAA to AAG. 2. Where are amino acids joined together to make polypeptides? A) Ribosomes. B) Nucleus. C) Nucleolus. D) Golgi apparatus. Show Answer Correct Answer: A) Ribosomes. 3. If the mRNA strand is AUG CCC GGG what would the complementary tRNA strand look like? A) AUG CCC GGG. B) UAC GGG CCC. C) TAC GGG CCC. D) GGG CCC AUG. Show Answer Correct Answer: B) UAC GGG CCC. 4. A DNA molecule produced by combining DNA from different sources is called? A) Polyploid DNA. B) Recombinant DNA. C) Diploid DNA. D) Mutant DNA. Show Answer Correct Answer: B) Recombinant DNA. 5. Avery and his coworkers showed the "transforming principle" as A) Polysaccharide. B) Protein. C) Lipid. D) DNA. Show Answer Correct Answer: D) DNA. 6. What does Lamarck's Theory state? A) Evolution occurred by the inheritance of acquired characteristics. B) Environment pressure causes body changes. C) All species of life have evolved over time from common ancestors through the process called natural selection. D) Organisms are arranged from simple to complex. Show Answer Correct Answer: B) Environment pressure causes body changes. 7. The codon is located on the A) MRNA. B) DNA. C) RRNA. D) TRNA. Show Answer Correct Answer: A) MRNA. 8. What is the enzyme responsible for DNA replication? A) DNA polymerase. B) Nucleolus. C) Ribosome. D) RNA polymerase. Show Answer Correct Answer: A) DNA polymerase. 9. PROCESSES: RNA making a protein is called: A) Transferrance. B) Translation. C) Transcription. D) Transmutation. Show Answer Correct Answer: B) Translation. 10. Genes may exist in several alternate forms called A) Alleles. B) Clones. C) Purines. D) Pyrimidines. Show Answer Correct Answer: A) Alleles. 11. What are Watson and Crick famous for? A) Making a 3D model of the double helix structure of DNA. B) Taking x-ray images of DNA's structure. C) Inferring that genetic information can be transferred. D) Confirming results that DNA was the genetic material in cells. Show Answer Correct Answer: A) Making a 3D model of the double helix structure of DNA. 12. Which best describes the hierarchy of cell organization? A) Tissues, organ systems, cells, organs. B) Organs, cells, organs systems, tissues. C) Cells, tissues, organs, organ systems. D) Organ systems, cells, organs, tissues. Show Answer Correct Answer: C) Cells, tissues, organs, organ systems. 13. Which statement about cells and sugar is true? A) Both animal cells and plant cells use sugar. B) Animal cells use sugar, but plant cells do not. C) Animal cells do not use sugar, but plant cells do. D) Neither animal cells nor plant cells use sugar. Show Answer Correct Answer: A) Both animal cells and plant cells use sugar. 14. The anticodon is located on A) TRNA. B) DNA. C) MRNA. D) RRNA. Show Answer Correct Answer: A) TRNA. 15. The chain of amino acids that are translated using a codon chart creates: A) Base. B) Sugar. C) Phosphate. D) Protein. Show Answer Correct Answer: D) Protein. 16. Which two colours of light does chlorophyll absorb most? A) Red and yellow. B) Green and blue. C) Red and green. D) Red and blue. Show Answer Correct Answer: D) Red and blue. 17. When the strong transcription occur? A) Glucose present, lactose absent. B) Glucose absent, lactose present. C) Glucose present, lactose present. D) Glucose absent, lactose absent. Show Answer Correct Answer: B) Glucose absent, lactose present. 18. A codon consists of how many nucleotides A) 3. B) 4. C) 2. D) 1. Show Answer Correct Answer: A) 3. 19. In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the following facts? A) DNA contains nitrogen, whereas protein does not. B) DNA contains phosphorus, whereas protein does not. C) DNA contains sulfur, whereas protein does not. D) DNA contains purines, whereas protein includes pyrimidines. Show Answer Correct Answer: B) DNA contains phosphorus, whereas protein does not. 20. A single-base mutation in a messenger RNA molecule could transcribe the DNA sequence CAGTAT into A) GUAAUA. B) GUCAUA. C) GTCATA. D) GTCUTU. Show Answer Correct Answer: A) GUAAUA. 21. E. coli cells grown on N-15 medium are transferred to N-14 medium and allowed to grow for 2 more generations. DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment? A) One high-density and one low-density band. B) One intermediate-density band. C) One high-density and one intermediate-density band. D) One low-density and one intermediate-density band. Show Answer Correct Answer: D) One low-density and one intermediate-density band. 22. DNA that has been separated so that only one strand remains leaving the bases facing upwards for probes to find and attach to A) SsDNA. B) MRNA. C) RRNA. D) SiRNA. Show Answer Correct Answer: A) SsDNA. 23. Which is an effect of regular exercise? A) Weaker bones. B) Less energy. C) Better hearing. D) Stronger heart. Show Answer Correct Answer: D) Stronger heart. 24. Which molecule is a monosaccharide? A) Glycogen. B) Glycerol. C) Ribose. D) Amylase. Show Answer Correct Answer: C) Ribose. 25. Which step would be the first step in a signal transduction pathway? A) Phophorylation of proteins. B) Activation of protein. C) Binding a ligand to a receptor. D) None of above. Show Answer Correct Answer: C) Binding a ligand to a receptor. 26. The process of using plasmids to clone genes is known as A) Transgenics. B) Transformation. C) Cloning. D) Recombination. Show Answer Correct Answer: B) Transformation. 27. An organism's phenotype A) Is the code for its traits. B) Is all of its traits. C) Fruit smoothie. D) Is its genotype. Show Answer Correct Answer: B) Is all of its traits. 28. During DNA replication, a DNA strand that has the bases AGCTTG produces a strand with the bases A) TCGAAC. B) TCCGCA. C) GAUCCA. D) AGCTTG. Show Answer Correct Answer: A) TCGAAC. 29. A student observes black circular patches on rose leaves. The weather was warm and humid for two weeks prior to the appearance of the black patches. What is the most likely reason the leaves developed the black patches? A) Presence of caterpillars on leaves. B) Inheritance of traits from parents. C) Growth of rose plants in excess sunlight. D) Presence of fungal spores on leaves. Show Answer Correct Answer: D) Presence of fungal spores on leaves. 30. What amino acid does AUG code for? A) Lys. B) Phe. C) Pro. D) Met. Show Answer Correct Answer: D) Met. ← 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 8Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books