This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 24 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When in the cell cycle is DNA replication? A) S phase of interphase. B) Go of interphase. C) Mitosis. D) Meiosis. Show Answer Correct Answer: A) S phase of interphase. 2. The end products of translation are A) Polypeptide. B) Lipids. C) RNA. D) DNA. Show Answer Correct Answer: A) Polypeptide. 3. What are the backbones (sides) of the DNA structure made up of? A) Repeating phosphates and sugars. B) Nitrogen bases. C) Nucleotides. D) Adenine and thymine. Show Answer Correct Answer: A) Repeating phosphates and sugars. 4. Research has shown that the genetic code is not entirely universal. Which research finding has shown this? A) Some amino acids are coded for by more than one codon. B) There are differences between the base sequences of genes in different species. C) In some organisms the genetic code for mitochondria differs from the genetic code for the nucleus. D) Some codons code for the addition of an amino acid and some code for the termination of translation. Show Answer Correct Answer: C) In some organisms the genetic code for mitochondria differs from the genetic code for the nucleus. 5. The initial RNA formed is A) Mature RNA. B) ScRNA. C) Heterogenous nuclear RNA. D) TRNA. Show Answer Correct Answer: C) Heterogenous nuclear RNA. 6. What is one role of the element phosphorus? A) It forms part of the structure of amino acids. B) It forms part of the structure of fatty acids. C) It forms part of the structure of ribose. D) It forms part of the structure of nucleotides. Show Answer Correct Answer: D) It forms part of the structure of nucleotides. 7. Which is true of aerobic cellular respiration? A) Lactate and large amounts of ATP produced. B) Large amounts of CO2, H2O and ATP produced. C) Large amounts of CO2, H2O and small amounts of ATP produced. D) Small amounts of lactate and ATP produced. Show Answer Correct Answer: B) Large amounts of CO2, H2O and ATP produced. 8. The strand on which the mRNA is constructed A) Template antisense. B) Coding strand. C) Sense strand. D) RNA strand. Show Answer Correct Answer: A) Template antisense. 9. Any change in the sequence of DNA is..... A) Transgenic shift. B) Single Genotype. C) Monohybrid Trait. D) Mutation. Show Answer Correct Answer: D) Mutation. 10. Which of the following terms describes the process of the uptake of recombinant plasmids into bacteria cells? A) RDNA technology. B) Transferrence. C) Transformation. D) RDNA plasmid. Show Answer Correct Answer: C) Transformation. 11. Translation involves all of the following types of molecules except A) Amino acids. B) MRNA. C) TRNA. D) DNA. Show Answer Correct Answer: D) DNA. 12. The making of mRNA from DNA is called? A) Transcription. B) Translation. C) Replication. D) Duplication. Show Answer Correct Answer: A) Transcription. 13. How is the sequence of DNA conserved A) Separation of sister chromatids to opposite poles during mitosis. B) Transcription into complementary RNA for protein synthesis. C) Complementary base pair matching during DNA replication. D) Conservation of DNA by the enzyme sequenceconservertase. Show Answer Correct Answer: C) Complementary base pair matching during DNA replication. 14. The double helix model was proposed by A) Watson and Crick. B) Griffith. C) Avery. D) Beadle and Tatum. Show Answer Correct Answer: A) Watson and Crick. 15. Which molecule is a polysaccharide? A) Triglyceride. B) Lactase. C) Glycerol. D) Glycogen. Show Answer Correct Answer: D) Glycogen. 16. The fragments on the lagging strand that are made up of repeating segments of DNA and RNA Primers A) Okazaki fragments. B) Primase. C) Polymerase. D) Unused DNA. Show Answer Correct Answer: A) Okazaki fragments. 17. Which of the following statements about the genetic code is true? A) A codon can specify more than one amino acid. B) Every codon specifies a different amino acid. C) Some codons specify the same amino acid. D) Some codons have no function at all. Show Answer Correct Answer: C) Some codons specify the same amino acid. 18. How many pairs of chromosomes are found in human body cells? A) 2 pairs. B) 4 pairs. C) 23 pairs. D) 46 pairs. Show Answer Correct Answer: C) 23 pairs. 19. Which biomolecule is responsible for insulation and energy storage? A) Protein. B) Nucleic Acid. C) Lipid. D) Carbohydrate. Show Answer Correct Answer: C) Lipid. 20. What is the correct description of bacterial chromosomes? A) Many linear pieces of DNA in the cytoplasm. B) Many linear pieces of DNA in the nucleus. C) One circular piece of DNA in the cytoplasm. D) Many circular pieces of DNA in the nucleus. Show Answer Correct Answer: C) One circular piece of DNA in the cytoplasm. ← 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