MB 230 midterm 1 UPDATED Exam
Questions and CORRECT Answers
Microbes - CORRECT ANSWER - Super diverse
1. Microscopic
2. 'Simple Organisms' (no tissue organization)
Simple Microbes: Unicellular - CORRECT ANSWER - Organism= one cell
Bacteria, archaea, protists
Some fungi, sometimes
Simple Microbes: Multicellular - CORRECT ANSWER - Organism= multiple cells
No tissue differentiation!
Fungi (sometimes)
Tree of Life - CORRECT ANSWER - 1) Bacteria
2) Archaea
3) Eukarya
**Viruses are not alive!!! also prions and viroids
Eukaryotes - CORRECT ANSWER - Have a nucleus, other membrane-bound organelles
Harder to access DNA than in prokaryotes
Prokaryotes - CORRECT ANSWER - No nucleus
No membrane bound organelles Bacteria and archaea
Cell Theory - CORRECT ANSWER - 1) All living organisms are made of cells
, 2) Cells are the basic unit of life
3) All living things are made of cells
4) Cells arise from preexisting cells
5) All cells have the same basic chemical composition
How do we create or add to scientific theory? - CORRECT ANSWER - Gather
observations and measurements to support or refute ideas, ideas that are highly supported by
scientists never stop being tested. If there's enough evidence and validation then it becomes
scientific theory.
Louis Pasteur - CORRECT ANSWER - Swan neck flask.
Microbes needed oxygen and nutrients to survive.
Discovered that life arises from pre-existing life.
Germ Theory - CORRECT ANSWER - Microorganisms are the cause of infectious
disease.
1860s Louis Pasteur shows microorganisms are associated with silkworm disease and wine
spoilage.
1890 Koch publishes postulates for demonstrating a certain microorganism causes a specific
disease.
Koch's Postulates - CORRECT ANSWER - Used to demonstrate that a microorganism
causes a disease.
P1. The same microbe is present in every cause of the disease
P2. Microbes are isolated from tissue of a dead animal, grow a culture
P3. Microbes are put into a healthy susceptible animal.
P4. Microbes isolated from new sick animal and compared to an original animal-microbe.
Questions and CORRECT Answers
Microbes - CORRECT ANSWER - Super diverse
1. Microscopic
2. 'Simple Organisms' (no tissue organization)
Simple Microbes: Unicellular - CORRECT ANSWER - Organism= one cell
Bacteria, archaea, protists
Some fungi, sometimes
Simple Microbes: Multicellular - CORRECT ANSWER - Organism= multiple cells
No tissue differentiation!
Fungi (sometimes)
Tree of Life - CORRECT ANSWER - 1) Bacteria
2) Archaea
3) Eukarya
**Viruses are not alive!!! also prions and viroids
Eukaryotes - CORRECT ANSWER - Have a nucleus, other membrane-bound organelles
Harder to access DNA than in prokaryotes
Prokaryotes - CORRECT ANSWER - No nucleus
No membrane bound organelles Bacteria and archaea
Cell Theory - CORRECT ANSWER - 1) All living organisms are made of cells
, 2) Cells are the basic unit of life
3) All living things are made of cells
4) Cells arise from preexisting cells
5) All cells have the same basic chemical composition
How do we create or add to scientific theory? - CORRECT ANSWER - Gather
observations and measurements to support or refute ideas, ideas that are highly supported by
scientists never stop being tested. If there's enough evidence and validation then it becomes
scientific theory.
Louis Pasteur - CORRECT ANSWER - Swan neck flask.
Microbes needed oxygen and nutrients to survive.
Discovered that life arises from pre-existing life.
Germ Theory - CORRECT ANSWER - Microorganisms are the cause of infectious
disease.
1860s Louis Pasteur shows microorganisms are associated with silkworm disease and wine
spoilage.
1890 Koch publishes postulates for demonstrating a certain microorganism causes a specific
disease.
Koch's Postulates - CORRECT ANSWER - Used to demonstrate that a microorganism
causes a disease.
P1. The same microbe is present in every cause of the disease
P2. Microbes are isolated from tissue of a dead animal, grow a culture
P3. Microbes are put into a healthy susceptible animal.
P4. Microbes isolated from new sick animal and compared to an original animal-microbe.
