Unit 4 Quiz Flashcards Preview

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Flashcards in Unit 4 Quiz Deck (40):
1

Macromolecules

Carbohydrates
Lipids
Proteins
Nucleic Acids

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Carbohydrates

primary energy source

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Lipids

secondary energy source.
important because all cells are made of phospholipids

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Monomer

a subunit that composes a macromolecule

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Protein's monomer

amino acids

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Carbohydrates's monomer

simple sugars

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Lipid's monomer

glycerol + fatty acids

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Carbohydrates

Monosaccharides
Disaccharides
Polysaccharides

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Monosaccharides

1 molecule
simple sugars
glucose
fructose

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fructose

naturally occurring sugar in fruit

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Disaccharides

2 monosaccharides
sucrose
lactose
maltose

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Polysaccharides

starch
cellulose

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Starch

naturally occurring found in plants

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Dehydration Synthesis (Condensation Synthesis)

how you get disaccharides and polysaccharides.

Two monomers bond together, and then water is released, (and then a covalent bond is formed)

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Colorimetry

put a solution in a test tube and test for protein

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Protein + Biuret --->

Purple
(this indicates that there is protein present)

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Polymer

Chain of monomers

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Lipids

all lipids are hydrophobic (afraid of water)

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Examples of lipids

fat, oil, wax, cholesterol, and steroids

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Saturated Fats

solid (at room temperature)

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Unsaturated Fats

liquid (at room temperature)

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Lipid test Reagent

Sudan IV (four) dye

Bright Red

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Lipid Emulsifier

Detergent

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Benedict's Test

testing to see if a solution contains "simple sugar" (reducing sugars)

Add reagent.
You also have to add third factor (heat) to drive the reaction.

You'll get a color change if the simple sugar (Reducing sugars) are there

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Reducing Sugars Reagent

Benedict's Reagent

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Reducing Sugars Positive Outcome coloratin

+++ (large amount) burnt orange
++ (medium amount) yellow
+ (small amount) green

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Starch Test Reagent

Iodine

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Starch Test Positive Outcome coloration

Black

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Protein Test Reagent

Biuret

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Protein Test positive outcome coloration

Purple

(bright purple=large amount)

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Protein test/ Biuret looking for bonds (peptide bonds) between amino acids to indicate there is an

entire molecule of amino acids present.

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Protein test negative coloration

very light blue

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Starch test negative coloration

orange/brown

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Reducing sugars test negative coloration

blue

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Water was used in all three sections of the lab as a

negative control
because water has no protein or sugar

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Example of a monosaccharide

glucose

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Example of a disaccharide

sucrose

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Example of a polysaccharide

starch

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Protein molecules have special bonds called

peptide bonds

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Monosaccharides bond together in a process called

dehydration synthesis to make disaccharides and polysaccharides. During this process water is lost to create a covalent bond between monosaccharides.