HOL: Biological Macromolecules
_____ reagent is used to indicate the presence of reducing sugars. - Benedict's - Biuret's - IKI - Sudan III
Benedict's
An unknown tested negative for reducing sugars, starch, lipids, and DNA but positive for proteins. The sample could be identified as _____. - glucose - canola oil - milk - albumin
albumin
Proteins are formed by long chains of _____. - amino acids - lipids - nucleic acids - carbohydrates
amino acids
Composed of at least three sugar monomers and used for energy storage in cells.
complex carbohydrates
Process that connects monomers by releasing water molecules.
dehydration reaction
True or false: DNA occurs as a single-stranded nucleic acid composed of adenine, thymine, cytosine, and guanine.
false
True or false: Lipids are a diverse group of macromolecules that are water soluble.
false
Nucleic acids function for _____ in organisms. - energy storage - cell structure - genetic coding - membrane transport
genetic coding
Process that breaks down polymers by inserting water molecules.
hydrolysis reaction
Group of macromolecules that are insoluble in water.
lipids
What macromolecule does this reagent identify? Sudan III reagent
lipids
Glucose is a _____ that serves as an energy source for many organisms. - disaccharide - monosaccharide - polysaccharide - complex carbohydrate
monosaccharide
Form DNA and RNA chains.
nucleic acids
Examples of lipids include _____ and other molecules that are not water soluble - monosaccharides - disaccharides - oils - RNA
oils
Composed of long chains of amino acids.
proteins
What macromolecule does this reagent identify? Biuret's reagent
proteins
_____ are macromolecules formed of chains of amino acids. - Lipids - Carbohydrate - Proteins - Nucleic acids
proteins
Biuret's reagent turns from blue to _____ when mixed with a sample containing peptide bonds. - purple - black - orange - yellow
purple
What macromolecule does this reagent identify? Benedicts reagent
reducing sugars
Composed of 1-2 sugar monomers and used as an energy source for cellular function.
simple carbohydrates
IKI solution is used to detect _____. - simple carbohydrates - lactose - starch - proteins
starch
When using IKI indicator, an inky black colored solution is a positive test result for _____. - proteins - reducing sugars - starch - DNA
starch
What macromolecule does this reagent identify? IKI solution
starches
What macromolecule does this reagent identify? Dische diphenylamine reagent
DNA
True or false: Stored polysaccharides are broken down into simple sugars when cells require energy.
true
True or false: The Sudan III test is performed by carefully adding one drop of reagent followed by a drop of sample to filter paper.
true
