This quiz works best with JavaScript enabled. Home > Biology > Molecular Biology – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 25 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The Central Dogma of Molecular Biology is A) A summary of how DNA is used to make more DNA, RNA and protein. B) A translation of DNA codons into amino acids. C) The base pairing rules. D) No longer true. Show Answer Correct Answer: A) A summary of how DNA is used to make more DNA, RNA and protein. 2. A scientist cloned a goat. Which of these is a true statement about the cloned goat? A) It has new genes and traits. B) It lacks the genes for reproduction. C) It has the genes that are identical to the original goat. D) It looks the same but has different genes. Show Answer Correct Answer: C) It has the genes that are identical to the original goat. 3. Where photosynthesis happens A) Chloroplast. B) Nucleus. C) Mitochondria. D) None of above. Show Answer Correct Answer: A) Chloroplast. 4. In eukaryotes, functional messenger RNA molecules are made from A) Exons spliced together after introns are removed. B) Introns spliced together after exons are removed. C) Exons spliced together with introns. D) Long pieces of RNA shortened by the Dicer enzyme. Show Answer Correct Answer: A) Exons spliced together after introns are removed. 5. What is the process of converting mRNA message into protein? A) Replication. B) Transcription. C) Translation. D) None of above. Show Answer Correct Answer: C) Translation. 6. Which molecule can we find the promoter and terminator in? A) DNA. B) MRNA. C) TRNA. D) Polypeptide chain. Show Answer Correct Answer: A) DNA. 7. How can the rate of photosynthesis be measured? I. By the amount of oxygen produced II. By the increase in biomass III. By the amount of carbon dioxide produced A) I only. B) I and II only. C) I and III only. D) I, II and III. Show Answer Correct Answer: B) I and II only. 8. When the low level of transcription occur? A) Glucose present, lactose absent. B) Glucose absent, lactose absent. C) Glucose present, lactose present. D) Glucose absent, lactose present. Show Answer Correct Answer: C) Glucose present, lactose present. 9. Which best describes the nutrients that are sources of energy for the body? A) Fats and proteins. B) Fats and carbohydrates. C) Water and carbohydrates. D) Calcium and fiber. Show Answer Correct Answer: B) Fats and carbohydrates. 10. What is a promoter? A) Sequence of DNA at the beginning of the gene that tells RNA polymerase where to start transcription. B) Sequence of RNA that tells the ribosome where to start translation. C) Sequence of DNA at the beginning of the gene that tells the ribosome where to start transcription. D) Sequence of RNA that tells RNA polymerase where to start translation. Show Answer Correct Answer: A) Sequence of DNA at the beginning of the gene that tells RNA polymerase where to start transcription. 11. Which of the following one can be an example of non-ionizing radiation A) UV-rays. B) X-rays. C) Gamma rays. D) All of them. Show Answer Correct Answer: A) UV-rays. 12. How would smoking tobacco most likely have a negative impact on the ability of an individual to succeed at physical activities? A) It interferes with balance and coordination. B) It decreases the ability to make decisions rapidly. C) It decreases stamina and cardiovascular efficiency. D) It decreases the speed and power of muscle contractions. Show Answer Correct Answer: C) It decreases stamina and cardiovascular efficiency. 13. Branched, globular starch A) Amylopectin. B) Glycogen. C) Amylose. D) Monosaccharides. Show Answer Correct Answer: A) Amylopectin. 14. What must happen to a newly made polypeptide before it can be secreted from a cell? A) It must be translated by a ribosome found in the cytoplasm of the cell and then sent toward the cell membrane. B) It must be produced by a ribosome on the rough ER and sent to the golgi apparatus. C) It must be produced by a ribosome in the golgi apparatus and sent to the rough ER. D) None of above. Show Answer Correct Answer: B) It must be produced by a ribosome on the rough ER and sent to the golgi apparatus. 15. Codons are found on which molecule? A) MRNA. B) TRNA. C) RRNA. D) DNA. Show Answer Correct Answer: A) MRNA. 16. Which of the following describe the components and structure of a DNA nucleotide? A) A DNA nucleotide has three parts: a sugar called deoxyribose, a phosphate group, and a nitrogenous base. B) A DNA nucleotide has three parts: a sugar called ribose, a phosphate group and a nitrogenous base. C) A DNA nucleotide has four parts: adenine, guanine, cytosine and thymine. D) A DNA nucleotide has four parts: adenine, guanine, cytosine and uracil. Show Answer Correct Answer: A) A DNA nucleotide has three parts: a sugar called deoxyribose, a phosphate group, and a nitrogenous base. 17. Which of the following characteristics accurately describes lipids? A) They are made up of monosaccharides. B) They contain nitrogen in their elemental composition. C) They are produced in the nucleus of a cell. D) They are hydrophobic. Show Answer Correct Answer: D) They are hydrophobic. 18. TRNA is A) Used as a template to make protein. B) Part of a ribosome. C) A small molecule used by the ribosome and is not made into protein. D) All of the above. Show Answer Correct Answer: C) A small molecule used by the ribosome and is not made into protein. 19. How does each person's DNA differ? A) The bonds in the DNA are all different. B) There are different orders of nitrogenous bases. C) The phosphates in the DNA are different. D) There are different kinds of sugars in the nucleotides. Show Answer Correct Answer: B) There are different orders of nitrogenous bases. 20. Site where replication begins A) Polymerase action site. B) Replication fork. C) Replication Origin. D) In the front. Show Answer Correct Answer: C) Replication Origin. ← PreviousNext →Related 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 9Molecular Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books