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Rio Salado Bio 205 midterm Exam with complete solutions 2024_2025.
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Rio Salado Bio 205 midterm Exam with complete solutions 2024_2025.
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Rio Salado Bio 205 midterm Exam withcomplete solutions 2024/2025
Pathogenic - ANSWER-disease producing
Types of microbes - ANSWER-1.Bacteria
2.Archaea
3.Fungi
4.Protozoa
5.Algae
6.Viruses
7. Parasites
Bacteria - ANSWER-single celled, genetic material not enclose in membrane,
some can complete photosynthesis, some can swim using flagella
Bacteria are enclose in: - ANSWER-Cell walls made of peptoglycan
Bacterial Cells are called? - ANSWER-Prokaryotes
Bacterial Cell Shapes (3) - ANSWER-1. Bacillus (rods)
2. Coccus (spherical)
3. Spiral
Prokaryotes include both: - ANSWER-Bacteria and archeas
Bacterial reproduction - ANSWER-Binary Fission: divide into two equal cells
Archea - ANSWER-consist of prokaryotic cells, found in extreme environments,
does not cause disease in humans
, Peptoglycan - ANSWER-a polymer consisting of sugars and amino acids that
forms a mesh layer around the plasma membrane
Is peptoglycan found in archea - ANSWER-no
3 main groups of archea - ANSWER-1. Methanogens: produce methane as a
waste product from respiration
2. extreme halophiles: live in extremely salty environments
3. Extreme thermophiles: live in hot sulfurous water (hot springs)
Eukaryotes - ANSWER-have a distinct nucleus containing DNA surrounded by the
nuclear membrane
Fungi - ANSWER-eukaryotic, unicellular/multicellular, cell walls composed of
chitin, can reproduce sexually/asexually, feed on organic material from their
environment
Unicellular form of fungi: - ANSWER-yeasts (oval microbes, larger than bacteria)
Most popular fungi - ANSWER-molds (form visible masses called mycelia)
Protozoa - ANSWER-unicellular, eukaryotic microbes, various shapes, live as free
entities or as parasites.
How do protozoa move and reproduce: - ANSWER-pseudopods, flagella, or cilia.
Can reproduce asexually and sexually.
Algae - ANSWER-photosynthetic eukaryotes, various shapes, reproduce sexually
and asexually. Need light, water and carbon dioxide for food production and
growth. Play important role in balance of nature
Algae cell wall: - ANSWER-composed of cellulose
Algae found in: - ANSWER-fresh/salt water, soil and associated with plants
Viruses - ANSWER-very small (only be seen with electron microscope), acellular,
Virus Structure - ANSWER-contains a core made of one type of nucleic acid (DNA
or RNA). core is surrounded by protein coat . Sometimes coat is encased by an
additional lipid membrane
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