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Microbiology Exam 2 | Practice Questions, Answers & Study Guide 2026/2027

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Institution Medical Microbiology

Course Medical Microbiology

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Microbiology Exam 2 | Practice Questions, Answers & Study Guide 2026/2027

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what is anything that has mass?

matter

what is the smallest unit of matter?

atom

what is a single type of atom?

elements

what is molecules?

combinations of atom

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what are the 3 compounds, what are they?

-Compound: 2 or more types of an atom
-Organic Compound: contains carbon and hydrogen
-Biomolecules: found in cells

What are the two types of bonds?
What do their lines look like?

-Covalent Bond: Solid Line
-Hydrogen Bond: Dashed Line

-What happens to Electrons in a covalent bond?
-How strong/weak is the bond?

-Electrons are shared between two atoms
-Strongest Bond

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-What happens to electrons in an iconic bond?
-How strong/weak is the bond?

-Electrons are transferred from one atom to another, not shared
-Middle Strength Bond

-How are hydrogen bonds created?
-How strong/weak is the bond?

-through the attraction between a positive hydrogen atom in one molecule and a highly electronegative atom
(like oxygen, nitrogen, or fluorine)
-Weak Bond

what is polarity?

having two opposite sides or charges — like a positive and a negative.

what is cohesion adhesion?
what does it create?

-property of water, where is can stick to itself
-creates surface tension on water

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which way does water freeze?

top to down

what is hydrophobicity?

-Water fearing/ Does not dissolve in water
-Example: Oil

what is hydrophilic?

-Water loving
-Example: Sugar

can ions and polar molecules dissolve in water?

yes

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