BIOL 1107: Lab Practical
what are the most abudant elements found in living organisms -
ANS -carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur
what is cohesion and adhesion - ANS -- cohesion: water
molecules can stick to other water molecules (high surface
tension)
- adhesion: water molecules can stick to other types of
molecules
equation for calculating pH - ANS -pH = -log(H+)
equation for calculating H+ concentration from pH - ANS -(H+) =
10 to the -pH
what does the phosphate buffer do - ANS -present in the
intercellular fluid of all cells in the body
,what does the carbonate buffer do - ANS -works to maintain the
pH of the blood (in bloodstream)
what does the protein buffer do - ANS -primary protein that
contributes to the body's buffering abilities is hemoglobin,
which is found in red blood cells
what is the dilution equation - ANS -C1 x V1 = C2 x V2
what is a peptide bond - ANS -binds proteins
between the acetyl group of one amino acid and the amino
group of another
list the monosaccharides - ANS -glucose, galactose, fructose
list the disaccharides - ANS -sucrose, maltose, lactose
list polysaccharides - ANS -starch, glycogen
, what bond forms fats and phospholipids - ANS -ester bond
connecting two fatty acid molecules and a glycerol
what are the elements of a nucleotide - ANS -phosphate group,
pentose sugar, nitrogenous base
what is a phosphodiester bond - ANS -binds nucleic acids
phosphate of one attaches to the sugar of the next
explain a sudan IV test - ANS -used to detect lipids
fatty acid chain will interact with sudan IV a nonpolar dye
produces a red-orange color
qualitative test (does not detect amount)
explain the benedict's test - ANS -- used to detect reducing
sugars
- initially clear deep blue color
- if mixture is heated and there is a reducing sugar, the reagent
will turn (green, yellow, orange, red, etc)
- quantitative test (red = more)
what are the most abudant elements found in living organisms -
ANS -carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur
what is cohesion and adhesion - ANS -- cohesion: water
molecules can stick to other water molecules (high surface
tension)
- adhesion: water molecules can stick to other types of
molecules
equation for calculating pH - ANS -pH = -log(H+)
equation for calculating H+ concentration from pH - ANS -(H+) =
10 to the -pH
what does the phosphate buffer do - ANS -present in the
intercellular fluid of all cells in the body
,what does the carbonate buffer do - ANS -works to maintain the
pH of the blood (in bloodstream)
what does the protein buffer do - ANS -primary protein that
contributes to the body's buffering abilities is hemoglobin,
which is found in red blood cells
what is the dilution equation - ANS -C1 x V1 = C2 x V2
what is a peptide bond - ANS -binds proteins
between the acetyl group of one amino acid and the amino
group of another
list the monosaccharides - ANS -glucose, galactose, fructose
list the disaccharides - ANS -sucrose, maltose, lactose
list polysaccharides - ANS -starch, glycogen
, what bond forms fats and phospholipids - ANS -ester bond
connecting two fatty acid molecules and a glycerol
what are the elements of a nucleotide - ANS -phosphate group,
pentose sugar, nitrogenous base
what is a phosphodiester bond - ANS -binds nucleic acids
phosphate of one attaches to the sugar of the next
explain a sudan IV test - ANS -used to detect lipids
fatty acid chain will interact with sudan IV a nonpolar dye
produces a red-orange color
qualitative test (does not detect amount)
explain the benedict's test - ANS -- used to detect reducing
sugars
- initially clear deep blue color
- if mixture is heated and there is a reducing sugar, the reagent
will turn (green, yellow, orange, red, etc)
- quantitative test (red = more)
