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Bio 100 Exam UNLV Questions with Answers Verified 100% Correct
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Bio 100 Exam UNLV Questions with Answers Verified 100% Correct
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Bio 100 Exam UNLV Questions with AnswersVerified 100% Correct
What happens to acids and bases when placed in water? - ✔✔Acid- yield hydrogen ions
Base- accepts hydrogen ions
Acidity - ✔✔Increased amount of H+
pH - ✔✔-The concentration of hydrogen ions (H+) in a solution
-Range 0-14; based on log scale
- 0 = most acidic
- 14 = most basic
Buffers - ✔✔-Substances that keep pH from changing
-Yields or accepts H+
- Ex. Blood
Biological molecules - ✔✔Carbohydrates, lipids, proteins, nucleic acids (DNA)
Carbon - ✔✔6 protons - 4 valence electrons
Carbohydrates - ✔✔Sugar starches; energy sources
Simple carbohydrate - ✔✔-Simple sugar; glucose and fructose C6H12O6
- monosaccharides and disaccharides
Complex carbohydrate - ✔✔-Starch (potato), polysaccharides
, -Made of repeating units
Monomers - ✔✔-Generic name for repeating units
-Formed through DEHYDRATION SYNTHESIS
-Broken through HYDROLYSIS
Dehydration synthesis - ✔✔Combines molecules
Hydrolysis - ✔✔Splits molecules
Lipids - ✔✔Fats, oils, waxes
Properties of lipids - ✔✔-Insoluble in water
-High ratio of H to O
-Major uses:
--Energy
--Energy storage
--Insulation
--Protection
--Cellular structure and function
Saturated fatty acid - ✔✔"saturated with hydrogens"
- H has a positive charge; + repel
Unsaturated fats - ✔✔-DOUBLE BONDS between carbons change physical shape of the
molecule; thus its behavior
-More flexible
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