This quiz works best with JavaScript enabled. Home > Science > Biology > Biology – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biology Quiz 5 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which statement about Brown algae is correct? A) Reserve food is Floridean starch. B) Two Equal apical flagella present. C) Cell wall made of cellulose and algin. D) Chlorophyll a and d present. Show Answer Correct Answer: C) Cell wall made of cellulose and algin. 2. Why can someone be grumpy when sleepy? A) Melatonin causes sleep and angry hormones. B) Melatonin blocks the entry of dopamine and oxytocin into receptors due to its size. C) Dopamine refuses to turn up when melatonin is present. D) None of above. Show Answer Correct Answer: B) Melatonin blocks the entry of dopamine and oxytocin into receptors due to its size. 3. What is the function of DNA polymerase I? A) To add appropriate nucleotides in the 3' $\rightarrow$ 5' direction. B) To remove the RNA primers and replace them with DNA. C) To join together the Okazaki fragments. D) To join together both strands of DNA to the histones. Show Answer Correct Answer: B) To remove the RNA primers and replace them with DNA. 4. The functional unit of gene called as A) Citron. B) Muton. C) Recon. D) Gene. Show Answer Correct Answer: A) Citron. 5. What process does a multi-cellular organism use to replace its damaged body cells? A) Mitosis. B) Meiosis. C) Replication. D) Transcription. Show Answer Correct Answer: A) Mitosis. 6. Which environmental factor would cause the greatest decrease in the number of species of plants and animals living in some of the lakes in the United States? A) Increase in dissolved oxygen levels. B) Global warming. C) Ozone destruction. D) Acid rain. Show Answer Correct Answer: D) Acid rain. 7. Where is the DNA found in a prokaryotic cell? A) Floating around in the cytoplasm. B) In the nucleus. C) In the middle. D) Slightly to the right. Show Answer Correct Answer: A) Floating around in the cytoplasm. 8. There are little pores on the bottom of the leaf called ..... A) Stem. B) Root. C) Stomata. D) Palisade mesophyll. Show Answer Correct Answer: C) Stomata. 9. What is the pigment in chloroplasts that performs photosynthesis? A) Chlorosynthesis. B) Chlorophyll. C) ADP. D) Electron Transport. Show Answer Correct Answer: B) Chlorophyll. 10. What organelle helps with cell digestion? A) Lysosomes. B) Ribosomes. C) Golgi Complex. D) ER. Show Answer Correct Answer: A) Lysosomes. 11. What are Okazaki fragments made of? A) DNA only. B) RNA only. C) DNA and RNA. D) Protein. Show Answer Correct Answer: A) DNA only. 12. What contributes to the enhanced greenhouse effect? A) Methane from agricultural sources. B) Ozone from violent thunderstorms. C) Carbon particles in diesel engine exhaust. D) Carbon dioxide from active volcanoes. Show Answer Correct Answer: A) Methane from agricultural sources. 13. Which substance must a green plant obtain from its environment to carry on photosynthesis? A) Glucose and water. B) Oxygen and chlorophyll. C) Carbon dioxide and water. D) Carbon dioxide and oxygen. Show Answer Correct Answer: C) Carbon dioxide and water. 14. Organisms that can capture energy from inorganic, nonliving sources. A) Producers. B) Consumers. C) Detritivores. D) Carnivores. Show Answer Correct Answer: A) Producers. 15. A(n) ..... is all living and nonliving things in a particular area that interact with one another A) Biome. B) Community. C) Ecosystem. D) Population. Show Answer Correct Answer: C) Ecosystem. 16. The study of insects is ..... A) Ecology. B) Embryology. C) Genetics. D) None of above. Show Answer Correct Answer: B) Embryology. 17. Ecosystems possess.. A) Only living components. B) Only non-living components. C) Both living and non-living components. D) None of above. Show Answer Correct Answer: C) Both living and non-living components. 18. It is the study of tissue organization and structure as observed through light microscope. A) Cell biology. B) Histology. C) Physiology. D) Morphology. Show Answer Correct Answer: B) Histology. 19. Where are genetics stored? A) On one or more chromosomes. B) Nucleus. C) Heart. D) Brain. Show Answer Correct Answer: A) On one or more chromosomes. 20. The three main types of cells are ..... A) Plant, Whale, Grass. B) Plant, Animal, Bacteria. C) Human, Dirt, Mountains. D) Ocean, Sky, Desert. Show Answer Correct Answer: B) Plant, Animal, Bacteria. ← PreviousNext →Related QuizzesScience QuizzesBiology Quiz 1Biology Quiz 2Biology Quiz 3Biology Quiz 4Biology Quiz 6Biology Quiz 7Biology Quiz 8Biology Quiz 9Biology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books