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Chapter 05 - The Microbial World

Chapter 05 The Microbial World

Multiple Choice Questions

1. One of the following statements about marine is not true: A. Are involved in the release of DOM (dissolved organic matter) into the water. B. Bridge the gap between the non-living and the living. C. Their genetic material is in the form of DNA or RNA. D. Cause diseases in many types of . E. Consist of minute cells sometimes attached into chains.

2. Bacteriophages are types of: A. Archea. B. . C. . D. . E. Viruses.

3. differ from in regards to: A. Shape of DNA molecules. B. Size of ribosomes. C. Presence of nucleus. D. All answers are correct. E. Shape of DNA molecules and Size of ribosomes only.

5-1 © 2013 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part Chapter 05 - The Microbial World

4. Which of the following is not true of decay bacteria? A. Break down waste products and dead organic matter B. Carry out C. Are D. Are particularly abundant in bottom sediments E. Ensure the recycling of essential nutrients

5. Bacteria that make their own organic compounds by obtaining energy from chemical compounds and not directly from light are known as: A. Heterotrophic. B. Decay. C. Photosynthetic. D. . E. Chemosynthetic.

6. Cyanobacteria are characterized by being: A. Decomposers. B. Found only in the . C. Having a glass-like skeleton. D. Protists. E. Photosynthetic.

7. Which of the following would be classified as autotrophic? A. Cyanobacteria. B. Lysogenic viruses. C. Bacteriophages. D. All answers are correct. E. Lysogenic viruses and Bacteriophages only.

5-2 © 2013 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part Chapter 05 - The Microbial World

8. Endophytes are primary producers that live: A. On the surface of planktonic organisms. B. Inside primary producers. C. Inside . D. On the surface of animals. E. Within decay organisms.

9. are classified as being: A. Prokaryotic. B. only. C. Heterotrophs only. D. Consisting of nucleic acids and a protein coat. E. Eukaryotic.

10. Archaea are now being detected in many environments by identifying one of the following chemicals characteristic of the group: A. Pigments. B. . C. Nucleic acids. D. Proteins. E. .

11. Organisms having a shell made of silica (SiO2): A. Foraminiferans. B. . C. Cyanobacteria. D. . E. .

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12. Diatoms are mostly: A. Heterotrophs. B. Planktonic. C. Multicellular. D. Red in color. E. Prokaryotic.

13. Which of the following are considered to be extremophiles due to the they exist in? A. Marine B. Diatoms C. Archaea D. Radiolarians

14. Which of the following can be dangerous to human health? A. Diatoms B. C. Radiolarians D. All answers are correct E. Diatoms and Dinoflagellates only

15. Some planktoic cyanobacteria have the ability to "fix" which of the following elements thus having a fertilizing effect on the marine environment similar to the ability of the land legumes? A. B. Helium C. D.

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16. Red tides are caused mostly by: A. Diatoms. B. Foraminiferans. C. Dinoflagellates. D. Red . E. Radiolarians.

17. Dinoflagellates that live in association with -building and other animals are known as: A. Zooxanthellae. B. . C. Silicoflagellates. D. Bioluminescent dinoflagellates. E. .

18. Generally the dominant group of planktonic primary producers in cold water: A. Foraminiferans. B. Silicoflagellates. C. Dinoflagellates. D. Photosynthetic bacteria. E. Diatoms.

19. : A. Are mostly photosynthetic. B. Are parts of lichens that live on rocky shores. C. Secrete calcareous skeletons. D. Produce red tides. E. None of the choices are correct: there are no marine fungi.

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20. Which of the following does not apply to protozoans? A. Multicellular. B. Their name derives from "first animals". C. Some are heterotrophs. D. Are included among the Protista. E. Some are autotrophs.

21. Radiolarians are characterized by: A. Being mostly planktonic. B. Having a calcareous skeleton. C. Being autotrophs. D. Having two flagella. E. Causing red tides.

22. Which of the following are not protozoans? A. Radiolarians B. Foraminiferans C. Dinoflagellates D. Ciliates E. Unicellular, planktonic organisms whose sediments form huge deposits on land

23. Which of the following are not protists? A. Dinoflagellates B. Cyanobacteria C. Diatoms D. Foraminiferans E. Ciliates

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24. What is the purpose of the spines seen on the of diatoms? A. Floatation B. Hunting C. Photosynthesis D. Reproduction E. Restore normal size

25. What is the function of an ? A. Floatation B. Hunting C. Photosynthesis D. Reproduction E. Restore normal size

26. An is defined as: A. Mass reproduction of algal cells. B. Mass death of algal cells. C. Mass feeding on algal cells by zooplankton. D. Mass vertical migrations of algal cells. E. Mass horizontal migrations of algal cells.

27. Bioluminescence is observed in: A. Diatoms. B. Dinoflagellates. C. Radiolarians. D. Foraminiferans. E. Lichens.

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28. Zooxanthellae, which live symbiotically with many species, are classified as: A. Diatoms. B. Dinoflagellates. C. Radiolarians. D. Foraminiferans. E. Lichens

29. What feature do all protozoa share? A. Reproductive strategies B. Habitats C. Feeding strategy D. Structure E. Being unicellular

30. A survival advantage of ______is the ability to withstand exposure to air for long periods of time during tidal cycles. A. Diatoms B. Dinoflagellates C. Radiolarians D. Foraminiferans E. Lichens

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