This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 32 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Guanine always hydrogen bonds with Cytosine. This is an example of: A) Contemplation Proclamation Perspiration. B) Complementary Base Pairing. C) Compligatory Nitrogenase. D) Confusatory Base Maturation. Show Answer Correct Answer: B) Complementary Base Pairing. 3. The codon is found on what structure? A) TRNA. B) RRNA. C) DNA. D) MRNA. Show Answer Correct Answer: D) MRNA. 4. 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. 5. Where does cellular respiration take place in the cell? A) Vacuole. B) Mitochondria. C) Cell Membrane. D) Nucleus. Show Answer Correct Answer: B) Mitochondria. 6. GENERAL: A nucleic acid that is composed of a phosphate, ribose sugar, and one of four nitrogen bases. A) DNA. B) STP. C) RNA. D) ATP. Show Answer Correct Answer: C) RNA. 7. A start codon is A) The last thing to be transcribed. B) A protein. C) An enzyme. D) A sequence of RNA. Show Answer Correct Answer: D) A sequence of RNA. 8. A nucleotide does NOT contain A) A phosphate group. B) A sugar. C) A nitrogen base. D) Polymerase. Show Answer Correct Answer: D) Polymerase. 9. Which is correct about the wavelengths and colors of visible light? A) Red 400-700nm violet. B) Violet 200-1000nm red. C) Violet 400-700nm red. D) Red 200-1000nm violet. Show Answer Correct Answer: C) Violet 400-700nm red. 10. All plants are made of cells. This was discovered by..... A) Rudolf Virchow. B) Matthias Schleiden. C) Aristotle. D) Robert Hooke. Show Answer Correct Answer: B) Matthias Schleiden. 11. 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. 12. Which is the mRNA molecule that would be transcribed from this DNA template:TGGCAAGTACGT A) ACCGUUCAUGCA. B) UCCGUUCUUGCU. C) UGGCAAGUACGU. D) ACCGTTCATGCA. Show Answer Correct Answer: A) ACCGUUCAUGCA. 13. 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. 14. 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) Okazaki fragments. C) Nucleotides. D) DNA polymerase III. Show Answer Correct Answer: A) DNA ligase. 15. A permanent change to the shape of a protein caused by the breaking of stabilizing bonds (h bonds) and interactions between R groups of their amino acids. A) Collagen. B) Dipeptide. C) Condensation. D) Denaturation. Show Answer Correct Answer: D) Denaturation. 16. Which part of a plant captures the light energy used in photosynthesis? A) Guard cells. B) Chlorophyll. C) Roots. D) None of above. Show Answer Correct Answer: B) Chlorophyll. 17. ..... directs construction of proteins. A) DNA. B) Hormones. C) RNA. D) Vitamins. Show Answer Correct Answer: A) DNA. 18. Catabolic reaction A) The breakdown of bigger molecules to smaller ones and uses energy. B) The build up of simpler molecules into more complex molecules and uses energy. C) The breakdown of complex molecules into more simpler molecules and doesn't require energy. D) The build up of small molecules into bigger ones and doesn't require energy. Show Answer Correct Answer: C) The breakdown of complex molecules into more simpler molecules and doesn't require energy. 19. What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? A) It catalyzes the lengthening of telomeres. B) It joins Okazaki fragments together. C) It unwinds the parental double helix. D) It synthesizes RNA nucleotides to make a primer. Show Answer Correct Answer: B) It joins Okazaki fragments together. 20. Which element is most common in proteins? A) Iron. B) Gercium. C) Nitrogen. D) Phosphorus. Show Answer Correct Answer: C) Nitrogen. 21. What type of mutation has occurred here? T-G-A-C-C-A T-G-A-G-C-A A) Deletion. B) Substitution. C) Insertion. D) Frameshift. Show Answer Correct Answer: B) Substitution. 22. The end product of translation is what? A) Protein. B) Amino acid. C) Sugar. D) Polypeptide. Show Answer Correct Answer: D) Polypeptide. 23. How does RNA differ from DNA? A) RNA contains the sugar deoxyribose instead of ribose. B) RNA contains the nitrogen base thymine instead of uracil. C) RNA consists of one nucleotide chain instead of two. D) None of above. Show Answer Correct Answer: C) RNA consists of one nucleotide chain instead of two. 24. The anticodon of a particular tRNA molecule is A) The part of tRNA that bonds with a specific amino acid. B) Complementary to the corresponding mRNA codon. C) Complementary to the corresponding triplet in rRNA. D) Catalytic, making the tRNA a ribozyme. Show Answer Correct Answer: B) Complementary to the corresponding mRNA codon. 25. A healthy lifestyle can be described as A) Exercise to the point of exhaustion. B) Eating anything you like and exercising 3 times a week. C) Eating a balanced diet and exercise regularly. D) None of above. Show Answer Correct Answer: C) Eating a balanced diet and exercise regularly. 26. One of the following nucleic acids has a left handed helix A) Z-DNA. B) T-RNA. C) A-DNA. D) M-RNA. Show Answer Correct Answer: A) Z-DNA. 27. Do all point mutations make a change in the amino acid sequence of a protein? A) Yes, there will always be one amino acid changed by the mutation. B) No, some mutations may change a codon, but the protein will not change. This is because there is more than one codon for all amino acids except methionine and tryptophan. C) Yes, a point mutation changes the whole protein. D) No, point mutations are too small to change a protein. Show Answer Correct Answer: B) No, some mutations may change a codon, but the protein will not change. This is because there is more than one codon for all amino acids except methionine and tryptophan. 28. An unmutated segment of DNA containing 40 molecules of adenine will contain an equal number of what? A) Uracil. B) Cytosine. C) Guanine. D) Thymine. Show Answer Correct Answer: D) Thymine. 29. ..... in the pancreatic and intestinal juice completes the digestion of lipids. A) Lipase. B) Amylase. C) Renin. D) Pepsin. Show Answer Correct Answer: A) Lipase. 30. Different amino acids have different ..... groups. A) R. B) Hydroxide. C) Carboxyl. D) Amine. Show Answer Correct Answer: A) R. ← 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 7Molecular Biology Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books