exam 3
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| what is the pH of a soln. with [H3O+]=3.0 times 10 to the neg 3 M | pH = -log [3.0 times 10 to the neg 3]
2.52
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| The process of crenation occurs when the concentration outside a cell is...... and is said to be.... | higher in concentration that inside the cell, hypertonic
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| which of the following is the storage form of glucose in the liver and muscle tissues? | glycogen
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| amino acids that are not synthesized in the body and must be obtained from the diet are called: | essential
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| which of the following is the weakest acid? | HCO3- with pKa=10.32
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| How many grams of glucose are needed to prepare 400 mL of a 2.0% (m/v) glucose solution? | 8.0 g
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| the function of a buffer is to: | maintain the pH of a solution
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| at physiological pH, glutamate has a form, what is the side chain?? | acidic
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| post meal blood glucose level. convert 180 mg/dL to millimolar | 10 mM
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| Bicarbonate, HCO3-, has a pKa=10.32. which form will predominate when the pH of the bicarbonate solution is 12.00? | CO32-
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| what is the concentration of a soln. made by adding 200 mL of water to 100 mL of 12% KCL solution? | 4.0%
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| what is the [H3O+] for a solution with pH=11.61 | 10^(-11.61)=2.45 time 10^-12 M
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| Ribulose has the following structure. To what class does the ribulose belong? | ketopentose
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| which of the following is a buffer system? | H2CO3 and KHCO3
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| what type of interaction would you expect between the following R groups in the tertiary structure of a protein? | salt bridges
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| In the figure above, the monosaccharide unit on the right is a: | aldohexose
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| in the figure above, the monosaccharide unit on the left is a: | ketohexose
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| The disaccharide shown above contains a.... glycosidic linkage. | alfa 2,6
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| A peptide bond contains which kind of functional group? | amide
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| the neutralization reaction between Al(OH)3 and HNO3 produces the salt with the formula | Al(NO3)3
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| what volume of a 15% (m/v) NaOH soln. will contain 120 g NaOH? | 800 mL
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| what amino acids have polar side chains that are attracted to water? | HYDROPHILIC
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| what would be the overall charge of the dipeptide shown below at a pH=12 | -1
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| ethylene glycol C2H6O2, molar mass=60.06 g/mol. a soln containing 86.0 g of ethylene is dissolved in 465 g water with a density of 1.35 g/ml(%m/m)of ethylene glycol in soln. | 86/551 times 100= 15.6%
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| whats the molarity of ethylene in soln? | 3.43 M
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| Hypotonic? | to low concentration
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| hypertonic | to high concentration
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| isotonic | same concentration
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| RBC undergoes lyses in water, why? | concentration diffs
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| why do proteins fold- hydrophobic , and hydrophilic...r groups | asdf
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