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24 Cards in this Set

  • Front
  • Back
Hypothesis
logical explanation
prediction
if/then statement designed to test a specific hypothesis
independent variable
the variable that changes in an experiment
controlled variable
the variable that would naturally change but that is artificially controlled
dependent variable
measurable change in experiment
control
experiment where the independent variable is at established level or left out.
macromolecule
large molecule
4 macromolecules
carbohydrates, proteins, lipids, DNA
Carbohydrate
simple sugar (monosaccharides)
protein
amino acids
DNA
nucleotides
Benedict's Solution + Heat
Simple Sugar: Blue to green to red-brown
Buiret
Protein: (NaOH + CuSO4) clear to violet. Detects presence of a peptide chain. Doesn't work if reactive groups aren't exposed.
Sudan IV
Lipid: clear red to deep red (fat soluble dye)
Grease spot
Lipid: Translucent on paper
Starch
Iodine (yellow to bluish-black)
What are sugars made up of and used for
Small carbohydrate molecules used as a source of energy by all organisms and manufactured in the chloroplasts of plants.
Carbohydrates
C, H, O
simple sugars (monosaccharides)
fructose, glucose
Dissaccharides
combination of 2 monosaccharides: lactose, galactose, maltose, sucrose,
polysaccharide
starches
cellulose
most abundant organic compound on earth - a polysaccharide that forms a plant's cell walls.
Amino Acid are formed of..
C, H, O, N
Peptide bond
buiret test tests for this bond in amino acid