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44 Cards in this Set
- Front
- Back
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atom
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all living things consist of a basic unit of matter
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how is a molecule formed?
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when atoms bond with on another.
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enzyme
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is a protien that speeds chemical reaction.
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amino acid
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is made up of protiens.
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R group means
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remainder group
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peptide
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is a chain of two or more amino acid.
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petide bond
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Is the bond between the amino acids.
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polypeptide
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is a very long chain of amino acids.
( a protien is can have one or more polypeptide chains) |
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biuret
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(blue color)
contains sodium or potassium hydroxide (NaOH or KOH) dilute copper sulfate CuSO4 reagent changes color in presence of protiens or peptides. biuret reagent(blue) protien(purple) peptides(pinkish-purple |
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carbohydrate
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sugars and molecules that are chains of sugars.
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glucose are?
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only has one sugar unit is a monosaccharide.
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maltose are?
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has two sugar units is a disaccharide.
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glycogen, stratch and cellulose are?
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polysaccharides, made up a chains of glucose units.
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what color is present when you mix iodine with starch?
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blue black color.
blue or black means it is positive for strarch when testing with iodine. |
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what color does benedict's solution turn when positive for sugar?
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green to red
(glucose or maltose) are low to high levels of sugar. |
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why does benedicts reagent have to be heated to test for sugar?
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when heated copper (Cu2+) reacts with parts of a sugar molecule.
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how does a fat molecule form?
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when glycerol joins three fatty acids after three water molecules are formed during dehydration reaction.
(water is added bonds are broken). |
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how do you test for fat?
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place it as is on a peice of brown paper if lipids(fats) appear there is a oily spot on paper.
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does water contain lipids?
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no (no fat is prestent)
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what is a polar molecule.
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they have charged groups of atoms.
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what does nonpolar mean?
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they have no charged groups of atoms.
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is water polar or non polar?
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polar + charge.
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is fat polar or non polar?
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nonpolar - charge
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what happens when polar water molecules interacte with polar molecules?
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they disperse in water.
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what is the purpose of a emulsifier?
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can cause fat to disperse in water.
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what ends does a emulsifier have?
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polar and non polar (i)
when the non polar ends attrack to fat and the polar ends attrack to water emulsion is the result (breaks up in water) |
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wht type of bond joins a amino acid to make petides?
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petide bond
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what protien speeds chemical reaction?
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enzymes
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what gorup is different between amino acids?
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R group
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if iodine solution turns black what substance is present?
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starch
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if benedicts reagent turns red what substance is present?
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sugar
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what is the function of strach in plant cells?
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energy
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what is the function of fat in a animal cell?
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energy
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what molecules are released when when fat undergoes hydrolisis?
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emulsifier
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what type of organic molecule requires the action of emulsifiers 5to be properly digested?
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bile salts or tweens
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if a biuret reagent turns purple, what substance is present.
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protien
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to test wether a sample contains glucose, what reagent should be used?
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benidicts
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what does biuret reagent test for
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protien (pinkish purple)
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what does Iodine test for?
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starch (blue-black)
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what does benedict's reagent test for?
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sugar (green to orange-red)
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how do you test for fat?
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brown paper (if there is still an oily spot lipids are present.
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what is a monosaccharide
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a sugar that is one to five carbon units.
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what is a polysaccharide
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carbohydrate consiting of hundreds of monosaccharides.
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what is a disaccaride
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a simple sugar that consist of two bonded monosaccarides.
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