This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 29 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A nucleotide consists of a: A) Sugar, protein, and adenine. B) Sugar, amino acid, and starch. C) Sugar, phosphate group, and nitrogen base. D) Starch, phosphate group, and nitrogen base. Show Answer Correct Answer: C) Sugar, phosphate group, and nitrogen base. 2. What is the anticodon on the tRNA for Methionine if the codon for Methionine is AUG? A) UAC. B) TAC. C) CAU. D) CAT. Show Answer Correct Answer: A) UAC. 3. Which are necessary to make DNA replication semi-conservative?I. Separation of the strands by RNA polymeraseII. Complementary base pairingIII. Use of a pre-existing strand as a template A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: C) II and III only. 4. Which of the following reactions occurs when a dipeptide is formed from amino acids? A) Hydrolysis. B) Denaturation. C) Condensation. D) Oxidation. Show Answer Correct Answer: C) Condensation. 5. What is the basic unit of a protein? A) Nucleotide. B) Amino acid. C) Monosaccharide. D) Fatty acid. Show Answer Correct Answer: B) Amino acid. 6. The main source of energy for all life originally comes from ..... A) The Earth. B) The moon. C) The sun. D) The food we eat/make. Show Answer Correct Answer: C) The sun. 7. The process of capturing light energy and converting it to sugar energy is ..... A) Cellular respiration. B) Chemosynthesis. C) Photsynthesis. D) Kreb's cycle. Show Answer Correct Answer: C) Photsynthesis. 8. What is meant that DNA replication follows a "semi-conservative" model? A) After DNA replication, each strand contains one side that is a parental strand and the other side is a daughter strand. B) After DNA replication, one completed strand contains only parental DNA while the other contains only daughter DNA. C) None of these identify the "semi-conservative" model. D) After DNA replication, one completed strand contains a mixture of both parental DNA and daughter DNA dispersed throughout the strand. Show Answer Correct Answer: A) After DNA replication, each strand contains one side that is a parental strand and the other side is a daughter strand. 9. Both DNA and RNA are made up of building blocks known as A) Nucleotides. B) Complementary base pairs. C) Amino acids. D) Genes. Show Answer Correct Answer: A) Nucleotides. 10. The genetic instructions for forming a polypeptide chain are carried to the ribosome by the A) TRNA. B) RRNA. C) MRNA. D) DNA. Show Answer Correct Answer: C) MRNA. 11. What is the process for making another DNA copy of a chromosome? A) Replication. B) Transcription. C) Translation. D) Chromatin. Show Answer Correct Answer: A) Replication. 12. Osmosis is the movement of ..... across a membrane. A) Food. B) Energy. C) Oxygen. D) Water. Show Answer Correct Answer: D) Water. 13. Which sequence of DNA bases would pair with this partial strandCAT TCA CTG A) ATG TGA CAG. B) TAC ACT GTC. C) GTA AGT GAC. D) CAT TCA CTG. Show Answer Correct Answer: C) GTA AGT GAC. 14. Information obtained by Franklin from X-ray crystallography on DNA suggested that it is a A) Helix. B) Ribbon. C) Hollow cylinder. D) Pleated sheet. Show Answer Correct Answer: A) Helix. 15. If a short sequence of DNA is AATTGCCGT, its complement is A) AAAACDCCA. B) TTAACGGCT. C) TTAACGGCA. D) TTAAGCCGA. Show Answer Correct Answer: C) TTAACGGCA. 16. Protein denaturation often leads to formation of new hydrogen bonds. What is the process called? A) Denaturation. B) Degradation. C) Renaturation. D) Coagulation. Show Answer Correct Answer: D) Coagulation. 17. The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a A) C=C bond. B) Peptide bond. C) Phosphodiester bond. D) Hydrophobic bond. Show Answer Correct Answer: C) Phosphodiester bond. 18. Where the initiation of replication occurs in mitochondrial DNA? A) H strand. B) L strand. C) H and L strand. D) D and L stran. Show Answer Correct Answer: A) H strand. 19. Which choice is an example of a food item? A) Aspirin, because it is a medicine that reduces pain. B) Diet drink, because it tastes sweet but does not have calories. C) Water, because most of the human body is made of water. D) Beans, because they contain protein for muscle growth. Show Answer Correct Answer: D) Beans, because they contain protein for muscle growth. 20. Why are insertion and deletion mutations so harmful? A) They change all of the codons from the mutation on down the line, which changes the amino acid sequence. B) They insert things that an organism doesn't need. C) They often delete things that organisms need. D) Insertion and deletions are not any more harmful than substitution mutations. Show Answer Correct Answer: A) They change all of the codons from the mutation on down the line, which changes the amino acid sequence. ← 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