This quiz works best with JavaScript enabled. Home > Science > Virus And Bacteria – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Virus And Bacteria Quiz 42 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The tryptophan operon is A) Permanently turned on. B) Turned on when tryptophan is present in the growth medium. C) Turned off only when glucose is present in the growth medium. D) Turned off when tryptophan is added to the growth medium. Show Answer Correct Answer: D) Turned off when tryptophan is added to the growth medium. 2. What important role do bacteria called decomposers play? A) The return basic chemicals to the environment. B) They slow down food spoilage. C) Kill harmful bacteria. D) Produce vitamins in your intestine. Show Answer Correct Answer: A) The return basic chemicals to the environment. 3. An organism that is photosynthetic but needs organic compounds as a carbon source A) Chemoheterotroph. B) Chemoautotroph. C) Photoautotroph. D) Photoheterotroph. Show Answer Correct Answer: D) Photoheterotroph. 4. Some fungi secrete substances that are toxic to bacteria that compete with them for food. Scientists have used their knowledge of this ability of fungi in order to produce which of the following substances? A) Yogurt. B) Fertilizers. C) Plastic. D) Antibiotics. Show Answer Correct Answer: D) Antibiotics. 5. Which one of the following is a viral disease transmitted to man by the bite rabid animals particularly dogs? A) Cholera. B) Plague. C) Malaria. D) Rabies. Show Answer Correct Answer: D) Rabies. 6. Chicken pox, SARS, Ebola, and AIDS are all types of A) Fungal diseases. B) Plant diseases. C) Bacterial diseases. D) Viral diseases. Show Answer Correct Answer: D) Viral diseases. 7. Parvo is a virus that affects ..... A) Humans. B) Cats. C) Dogs. D) Horses. Show Answer Correct Answer: C) Dogs. 8. Spherical prokaryote A) Coccus. B) Bacillus. C) Endospore. D) Chemoautotroph. Show Answer Correct Answer: A) Coccus. 9. HIV infects ..... A) Red blood cells. B) White blood cells. C) Nerve cells. D) Muscle cells. Show Answer Correct Answer: B) White blood cells. 10. A vaccines main goal is to: A) Make people sick. B) Prevent disease. C) Start an epidemic. D) Start a pandemic. Show Answer Correct Answer: B) Prevent disease. 11. Viruses are considered to be nonliving because they A) Cannot multiply. B) Use energy to grow. C) Are smaller than bacteria. D) Do not show all the characteristics of life. Show Answer Correct Answer: A) Cannot multiply. 12. A protein that can attach to a pathogen and make it useless is ..... A) A virus. B) A bacteria. C) A vaccine. D) An antibody. Show Answer Correct Answer: D) An antibody. 13. Producers such as grass and trees ..... A) Make their own food. B) Eat other organisms for food. C) Make carbon dioxide. D) Decompose dead organisms. Show Answer Correct Answer: A) Make their own food. 14. Which is the MOST effective defense against the chicken pox virus? A) Antibiotics. B) Diet. C) Excercise. D) Vaccine. Show Answer Correct Answer: D) Vaccine. 15. Viruses are not considered to be living things, what do suppose led scientists to this conclusion. A) They don't respond to stimuli. B) They don't consume energy. C) They don't grow. D) They can't reproduce. Show Answer Correct Answer: C) They don't grow. 16. Outer shell of a virus that protects the genetic material A) Nucleoid. B) Tail Fiber. C) Antibiotics. D) Capsid. Show Answer Correct Answer: D) Capsid. 17. The protein coat of a virus is known as the ..... A) Capsid. B) Genome. C) Cell membrane. D) Envelope. Show Answer Correct Answer: A) Capsid. 18. Bacteria are eukaryotic. This means that they have cell parts which ..... A) Have host cells. B) Regenerate. C) Are contained in a membrane. D) None of above. Show Answer Correct Answer: C) Are contained in a membrane. 19. A virus needs a/an ..... to reproduce. A) Organism. B) Dead cells. C) Host. D) Partner. Show Answer Correct Answer: C) Host. 20. Which of the following is NOT a rule to writing scientific names? A) The genus is the first word and capitalized. B) Both the genus and the species are capitalized. C) The second word is the species and is lower case. D) The scientific name is either italicized or underlined. Show Answer Correct Answer: B) Both the genus and the species are capitalized. ← PreviousNext →Related QuizzesVirus And Bacteria Quiz 1Virus And Bacteria Quiz 2Virus And Bacteria Quiz 3Virus And Bacteria Quiz 4Virus And Bacteria Quiz 5Virus And Bacteria Quiz 6Virus And Bacteria Quiz 7Virus And Bacteria Quiz 8Virus And Bacteria Quiz 9Virus And Bacteria Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books