BIOS 280 Test 2 - –Answer 1. Disease 2. They are everywhere 3. ...

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BIOS 280 Test 2

• Why should we care about microorganisms?

–Answer

• Disease
• They are everywhere
• Many are beneficial and useful
• For basic scientific research
• The death rate for infectious disease went down because (four reasons)

–Answer

• Proper food/water handling
• Sterile medical technique
• Antibiotics
• Vaccines
• What drastically rose the death rate in 1920?

–Answer The Influenza Pandemic

• T or F

Infectious disease is still a huge problem and getting worse.–Answer True

• What are the top 5 most common categories of infectious disease?

–Answer

• Respiratory Disease (pneumonia, influenza)

2. AIDS

• Diarrheal Disease (chloera, typhoid)
• Tuberculosis
• Malaria
• How much bacteria does one gram of soil have? 1 / 3

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–Answer 10^9 (one billion)

• T or F

The human body has more bacterial cells than human cells.–Answer True

• How many cells/gram are found in the large intestine?

–Answer

10^12-10^13

• Name some extreme places bacteria are found in (six places)

–Answer

• Geysers and hot springs
• Very cold habitats
• Deep-sea hydrothermal vents
• Hypersaline habitats
• Rock surfaces
• Life on other planets
• What type of bacteria can be found in geysers and hot springs?

–Answer Hyperther- mophilic bacteria

• What type of bacteria can be found in very cold habitats?

–Answer Snow algae

• What type of bacteria can be found in hypersaline habitats?

–Answer Halophilic bacteria

• What type of bacteria can be found on rock surfaces?

–Answer Endolithic bacteria 2 / 3

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• Give an example of why there may be life on other planets?

–Answer Ice on Mars

• Name reasons why microorganisms are beneficial and useful (six rea- sons)

–Answer

• Biotechnology
• Agriculture
• Food and chemical production
• Mineral Extraction

• Wastewater treatment
• Bioremediation
• Name three reasons microorganisms demonstrate utility in the lab and are helpful for basic

scientific research.–Answer

• Fast growth
• Small size
• Very amenable to genetic study
• What does microbiology encompass?

–Answer A study of microscopic organisms.

• Name the most important microorganisms we will be learning.

–Answer

• Bacteria
• Viruses
• Protozoa
• Microscopic Fungi
• Microscopic Algae
• Helminths and other parasites
• Microorganisms are to be seen with the naked eye.

–Answer

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