This quiz works best with JavaScript enabled. Home > Agriculture > Biology > Molecular > Molecular Biology – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 18 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mutations usually ..... A) Happen spontaneously. B) Are harmful. C) Are helpful. D) Are awesome. Show Answer Correct Answer: B) Are harmful. 2. Proteins are provided by A) Dried beans, peas, and nuts. B) Milk and eggs. C) Meat, fish, and poultry. D) All choices are correct. Show Answer Correct Answer: D) All choices are correct. 3. Which best describes how organisms obtain energy from food? A) Food (Glucose) reacts with sunlight to release energy during photosynthesis. B) Food (Glucose) reacts with oxygen to release energy (ATP) during cellular respiration. C) Food (Glucose) reacts with water to release energy during photosynthesis. D) Food (Glucose) reacts with carbon dioxide to release energy during cellular respiration. Show Answer Correct Answer: B) Food (Glucose) reacts with oxygen to release energy (ATP) during cellular respiration. 4. During the lytic infection by a virus, the host cell is- A) Not affected. B) Copied. C) Destroyed. D) Passed on to the lysogenic cycle. Show Answer Correct Answer: C) Destroyed. 5. Why we need exon only in translation? A) To start initiation. B) Exon is coding sequence. C) To terminate the transcription. D) To start the transcription. Show Answer Correct Answer: B) Exon is coding sequence. 6. Which molecules are monosaccharides? A) Glucose, lactose, cellulose. B) Sucrose, maltose, lactose. C) Starch, glycogen, cellulose. D) Fructose, glucose, galactose. Show Answer Correct Answer: D) Fructose, glucose, galactose. 7. Cellular Respiration's goal is to A) Make oxygen. B) Make ATP. C) Make glucose. D) Make water. Show Answer Correct Answer: B) Make ATP. 8. Which type of diet best contributes to a healthy lifestyle? Which type of diet best contributes to a healthy lifestyle? A) A diet high in protein and fat. B) A diet high in fruits, vegetables, and fats. C) A diet high in carbohydrates, fruits, and vegetables. D) A diet high in fruits, vegetables, and lean protein. Show Answer Correct Answer: D) A diet high in fruits, vegetables, and lean protein. 9. What is another name for restriction enzymes? A) DNA polymerase. B) Ligase. C) Ligase. D) Restriction endonucleases. Show Answer Correct Answer: D) Restriction endonucleases. 10. What causes mutations? A) The amino acids. B) It's how your born. C) Passed down by genetics. D) Mistakes in replication or environmental substances. Show Answer Correct Answer: D) Mistakes in replication or environmental substances. 11. Molarity of a given phosphoric acid solution (H3PO4) is 3M. It's normality is ..... . A) 1 N. B) 0.3. C) 9. D) 2 N. Show Answer Correct Answer: C) 9. 12. What is a change in DNA called? A) Mutation. B) Codon. C) Anticodon. D) Triplet. Show Answer Correct Answer: A) Mutation. 13. DNA is the genetic information within all living cells. What is the purpose of DNA within the cell? A) DNA is the material within the cell that regulates and controls cellular activity. B) DNA is used by the cell to fight off bacterial infections. C) DNA provides energy for photosynthesis. D) DNA assembles the transport proteins in a membrane. Show Answer Correct Answer: A) DNA is the material within the cell that regulates and controls cellular activity. 14. The folding and coiling into a three dimensional structure based on interactions between R-groups is known as the ..... structure of a protein. A) Secondary. B) Quaternary. C) Tertiary. D) Primary. Show Answer Correct Answer: C) Tertiary. 15. Which genetic abnormality can be identified through karyotyping? A) Point mutation. B) Recessive allele. C) Extra chromosomes. D) Sex-linked allele. Show Answer Correct Answer: C) Extra chromosomes. 16. Which is NOT an energetic exercise? A) Playing football. B) Dancing. C) Watching TV. D) Swimming. Show Answer Correct Answer: C) Watching TV. 17. G-proteins are classified as ....., A) Heterotrimeric. B) Tetrameric. C) Trimeric. D) None of above. Show Answer Correct Answer: A) Heterotrimeric. 18. The main enzyme involved in linking individual nucleotides into DNA molecules is A) Carbohydrase. B) Ribose. C) DNA polymerase. D) DNA protease. Show Answer Correct Answer: C) DNA polymerase. 19. Where in the cell does the second step of protein synthesis occur? A) In the DNA. B) In the nucleus. C) At the ribosome. D) In the Golgi Apparatus. Show Answer Correct Answer: C) At the ribosome. 20. During which process is mRNA formed? A) Transcription. B) Mutation. C) Replication. D) Translation. Show Answer Correct Answer: A) Transcription. 21. An RNA sequence includes 15 codons. How many amino acids does this sequence have? A) 5. B) 15. C) 3. D) 45. Show Answer Correct Answer: B) 15. 22. Which combination of foods BEST provides a healthy and nutritious meal? (not which one you like the best!) A) Steak, fries, orange juice, banana. B) Baked potato, chicken nuggets, fruits, and orange juice. C) Apple, grilled chicken sandwich, orange juice, and yogurt. D) Macaroni and cheese, orange juice, ice cream, and pound cake. Show Answer Correct Answer: C) Apple, grilled chicken sandwich, orange juice, and yogurt. 23. DNA helicase "unzips" double-stranded DNA to expose single-stranded section of DNA. New strands are generated using the original strand as a template. How do the newly-generated strands compare to the original template strands? A) They are much shorter. B) They are complementary. C) They are identical. D) They are twice as long. Show Answer Correct Answer: B) They are complementary. 24. How can the activity of a human amylase enzyme be increased during a laboratory experiment? A) Decreasing the pH from 7 to 3. B) Increasing the temperature from 20$^\circ$C to 37$^\circ$C. C) Adding sugar to the mixture. D) Adding water to the mixture. Show Answer Correct Answer: B) Increasing the temperature from 20$^\circ$C to 37$^\circ$C. 25. A new variety of rice called golden rice has been genetically modified to have vitamin A. People in starving countries can eat this rice and receive the vitamin A. Without this rice people go blind from vitamin A deficiency. What word(s) below best describes this rice? A) G.M.O. B) Clone. C) Electrophoresis. D) DNA fingerprinting. Show Answer Correct Answer: A) G.M.O. 26. Which of these molecules is a disaccharide? A) Ribose. B) Cellulose. C) Sucrose. D) Galactose. Show Answer Correct Answer: C) Sucrose. 27. Genetic screening technologies allow scientists to take a small sample of DNA from a developing organism and predict possible diseases the organism may develop during its lifetime. This is done by comparing the genes of the developing organism to the specific genes that code for and possibly develop into the disease later in life.Which question is least likely to accompany the use of genetic screening technologies? A) What effect will the use of this technology have on the treatment of the common cold?. B) Do the benefits of this technology outweigh the risks involved?. C) How will the knowledge obtained from this technology affect an individual?. D) Who will be able to benefit from this tchnology. Show Answer Correct Answer: A) What effect will the use of this technology have on the treatment of the common cold?. 28. Which would NOT be considered a substrate of cellular respiration? A) C6H12O6. B) CO2. C) O2. D) ADP. Show Answer Correct Answer: B) CO2. 29. Which of the following mutations would be most likely to have a harmful effect on an organism? A) A deletion of 3 nucleotides near the middle of the gene. B) A single nucleotide deletion in the middle of an intron. C) A single nucleotide deletion near the end of the coding sequence. D) A single nucleotide insertion downstream of, and close to, the start of the coding sequence. Show Answer Correct Answer: D) A single nucleotide insertion downstream of, and close to, the start of the coding sequence. 30. DNA mediated transposition includes A) Viral retro transposons. B) Eukaryotic transposons. C) Non - viral retro transposons. D) None of above. Show Answer Correct Answer: B) Eukaryotic transposons. ← 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