This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 11 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. When the strong transcription occur? A) Glucose present, lactose absent. B) Glucose present, lactose present. C) Glucose absent, lactose absent. D) Glucose absent, lactose present. Show Answer Correct Answer: D) Glucose absent, lactose present. 3. A codon consists of how many nucleotides A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 4. 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 sulfur, whereas protein does not. B) DNA contains phosphorus, whereas protein does not. C) DNA contains nitrogen, whereas protein does not. D) DNA contains purines, whereas protein includes pyrimidines. Show Answer Correct Answer: B) DNA contains phosphorus, whereas protein does not. 5. A single-base mutation in a messenger RNA molecule could transcribe the DNA sequence CAGTAT into A) GTCATA. B) GUCAUA. C) GTCUTU. D) GUAAUA. Show Answer Correct Answer: D) GUAAUA. 6. 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. 7. RNA stands for: A) Ribose, nucleotide, acid. B) Ribonucleic acid. C) Ribonucleic base. D) Run N' Attack. Show Answer Correct Answer: B) Ribonucleic acid. 8. DNA that has been separated so that only one strand remains leaving the bases facing upwards for probes to find and attach to A) RRNA. B) MRNA. C) SsDNA. D) SiRNA. Show Answer Correct Answer: C) SsDNA. 9. Which is an effect of regular exercise? A) Better hearing. B) Stronger heart. C) Weaker bones. D) Less energy. Show Answer Correct Answer: B) Stronger heart. 10. Which molecule is a monosaccharide? A) Ribose. B) Glycogen. C) Amylase. D) Glycerol. Show Answer Correct Answer: A) Ribose. 11. 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. 12. The process of using plasmids to clone genes is known as A) Cloning. B) Transformation. C) Recombination. D) Transgenics. Show Answer Correct Answer: B) Transformation. 13. 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. 14. During DNA replication, a DNA strand that has the bases AGCTTG produces a strand with the bases A) TCGAAC. B) TCCGCA. C) AGCTTG. D) GAUCCA. Show Answer Correct Answer: A) TCGAAC. 15. 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) Inheritance of traits from parents. B) Growth of rose plants in excess sunlight. C) Presence of fungal spores on leaves. D) Presence of caterpillars on leaves. Show Answer Correct Answer: C) Presence of fungal spores on leaves. 16. What amino acid does AUG code for? A) Pro. B) Lys. C) Met. D) Phe. Show Answer Correct Answer: C) Met. 17. Which organelle is DNA usually found in? A) Cell membrane. B) Vacuole. C) Chloroplast. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 18. Which of the following processes does not occur in prokaryotes? A) Transcription. B) Splicing. C) Translation. D) Replication. Show Answer Correct Answer: B) Splicing. 19. What are the amino acid produced from these two codons, CGU and CGA? A) Arg and Ala. B) Ser and Pro. C) Phe and Leu. D) Ala and Asp. Show Answer Correct Answer: A) Arg and Ala. 20. In what way did gene therapy, the replacement of a faulty gene with a normal one, stimulate medical research? A) New medications had to be developed and tested. B) The effects of viral DNA had to be studied. C) The way in which DNA replicates had to be determined. D) The genes on each chromosome had to be mapped and described. Show Answer Correct Answer: D) The genes on each chromosome had to be mapped and described. ← PreviousNext →Related QuizzesBiology 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books