How do microbes affect us? - ✔️✔️Play a major role in recycling essential elements
Source of nutrients and some carry out photosynthesis
Benefit society by their production of food, beverages, antibiotics, and vitamins
Some cause disease in people, plants, or animals
How are Prokaryotic cells structured? - ✔️✔️Contents are not divided by membranes into compartments,
no nucleus
How are Eukaryotic cells structured? - ✔️✔️Have a nucleus and membrane-bound organelles that
separate some materials and processes
What are the 3 domains based on ribosomal RNA? - ✔️✔️Bacteria (true bacteria)
Archaea
Eukarya (Eukaryotes)
What are the characteristics of the domain Bacteria? - ✔️✔️-Usually single-celled
-Majority have a cell wall with peptidoglycan
-Ubiquitous (found everywhere) and some live in extreme environments
-Major inhabitants of the human body
, What are the characteristics of the domain Archaea? - ✔️✔️-Unique rRNA (ribosomal RNA) sequences
-Lack peptidoglycan
-Have unique membrane lipids
-Some have unusual metabolic characteristics
-Many live in extreme environments
What is within the domain Eukarya? - ✔️✔️Protists: generally larger than Bacteria and Archaea
-Algae: photosynthetic
-Protozoa: animal-like metabolism
Fungi: 2 major groups
-Yeast: unicellular
-Molds and mushrooms: multicellular
Plantae
Animalia
What are the 2 types of acellular infectious agents? - ✔️✔️Viruses:
-Require host cell to replicate
-Cause range of diseases, some cancers
Prions:
-Infectious proteins
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