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chem final
exam 3
| Term | Definition |
|---|---|
| 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 |
| 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 |
| which of the following is the storage form of glucose in the liver and muscle tissues? | glycogen |
| amino acids that are not synthesized in the body and must be obtained from the diet are called: | essential |
| which of the following is the weakest acid? | HCO3- with pKa=10.32 |
| How many grams of glucose are needed to prepare 400 mL of a 2.0% (m/v) glucose solution? | 8.0 g |
| the function of a buffer is to: | maintain the pH of a solution |
| at physiological pH, glutamate has a form, what is the side chain?? | acidic |
| post meal blood glucose level. convert 180 mg/dL to millimolar | 10 mM |
| Bicarbonate, HCO3-, has a pKa=10.32. which form will predominate when the pH of the bicarbonate solution is 12.00? | CO32- |
| what is the concentration of a soln. made by adding 200 mL of water to 100 mL of 12% KCL solution? | 4.0% |
| what is the [H3O+] for a solution with pH=11.61 | 10^(-11.61)=2.45 time 10^-12 M |
| Ribulose has the following structure. To what class does the ribulose belong? | ketopentose |
| which of the following is a buffer system? | H2CO3 and KHCO3 |
| what type of interaction would you expect between the following R groups in the tertiary structure of a protein? | salt bridges |
| In the figure above, the monosaccharide unit on the right is a: | aldohexose |
| in the figure above, the monosaccharide unit on the left is a: | ketohexose |
| The disaccharide shown above contains a.... glycosidic linkage. | alfa 2,6 |
| A peptide bond contains which kind of functional group? | amide |
| the neutralization reaction between Al(OH)3 and HNO3 produces the salt with the formula | Al(NO3)3 |
| what volume of a 15% (m/v) NaOH soln. will contain 120 g NaOH? | 800 mL |
| what amino acids have polar side chains that are attracted to water? | HYDROPHILIC |
| what would be the overall charge of the dipeptide shown below at a pH=12 | -1 |
| 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% |
| whats the molarity of ethylene in soln? | 3.43 M |
| Hypotonic? | to low concentration |
| hypertonic | to high concentration |
| isotonic | same concentration |
| RBC undergoes lyses in water, why? | concentration diffs |
| why do proteins fold- hydrophobic , and hydrophilic...r groups | asdf |
Created by:
sarah.rushton298
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