1,708 Answered Questions for the topic biochemistry

11/04/20

Important question can someone help me?
After several steps of protein purification, your protein yield is lower than you would expect. You suspect a large amount of autolysis (protein degradation) of your sample. How might you minimise... more
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Biochemistry Science Chemistry

11/04/20

How to find the molar enthapy of Ammonium nitrate?
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10/29/20

Acid-Base Balance and Regulation (Cardiopulmonary Physiology)
Referencing your Siggard-Andersen nomogram, what is the approximate HCO3?FI02 =                   .21Spontaneously breathing @ f = 18Hgb =                   15pH =                     7.22PaC02... more
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Biochemistry

10/28/20

5) Answer the following questions about DNA polymerase-alpha primase. A) List the substrates of the primase. B) List the substrates of the polymerase.
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Biochemistry Science Biology Chemistry

10/28/20

Voting and Biodiversity

How does biodiversity affect voting
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10/27/20

Genetics question: A 26-year-old woman of Norwegian descent seeks genetic counseling. Her brother died at age eight of documented cystic fibrosis.
A 26-year-old woman of Norwegian descent seeks genetic counseling. Her brother died at age eight of documented cystic fibrosis. Both of their parents are deceased. The woman undergoes DNA testing... more
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10/26/20

Titration: Back Titration
44.2 mL of 1.27 M hydroiodic acid is added to 22.6 mL of calcium hydroxide, and the resulting solution is found to be acidic.28.2 mL of 1.33 M sodium hydroxide is required to reach neutrality.What... more
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10/26/20

Chemistry: Back Titration
50.9 mL of 1.16 M nitric acid is added to 29.9 mL of sodium hydroxide, and the resulting solution is found to be acidic.17.6 mL of 1.10 M calcium hydroxide is required to reach neutrality.What is... more
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10/26/20

Titration: Back Titration
36.8 mL of 1.92 M perchloric acid is added to 43.3 mL of sodium hydroxide, and the resulting solution is found to be acidic.26.7 mL of 0.693 M barium hydroxide is required to reach neutrality.What... more
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10/26/20

Titration: Back Titration
44.2 mL of 1.27 M hydroiodic acid is added to 22.6 mL of calcium hydroxide, and the resulting solution is found to be acidic.28.2 mL of 1.33 M sodium hydroxide is required to reach neutrality.What... more
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10/26/20

Titration: Back Titration
33.7 mL of 1.54 M hydrochloric acid is added to 31.2 mL of sodium hydroxide, and the resulting solution is found to be acidic.16.4 mL of 1.19 M barium hydroxide is required to reach neutrality.What... more
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Biochemistry

10/26/20

The oxygen end of water is _____________and the hydrogen end is _____________________.
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Biochemistry Organic Chemistry

10/25/20

Conceptual biochemistry/organic question

Dipalmitoylphosphatidylcholine is the major component of a surfactant secreted into the lung alveoli (the “sacs” in your lungs which allow large amounts of surface area for oxygen and carbon... more
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Biochemistry

10/25/20

Biochemistry part a/b question

5. (a) What is the free energy change if 1 mole of Na+ is transported across a cell membrane from the inside of the cell where the concentration is 1.0 µM to the outside of the cell where it is 100... more
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10/24/20

Solution Stoichiometry
How many grams of Ag2CO3 will precipitate when excess (NH4)2CO3 solution is added to 63.0 mL of 0.763 M AgNO3 solution?2AgNO3(aq) + (NH4)2CO3(aq) Ag2CO3(s) + 2NH4NO3(aq)
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10/24/20

Titration: Molarity of Acid or Base
An aqueous solution of barium hydroxide is standardized by titration with a 0.166 M solution of perchloric acid.If 22.2 mL of base are required to neutralize 13.4 mL of the acid, what is the... more
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10/24/20

Dilution: Moles to Volume
You wish to make a 0.240 M hydrochloric acid solution from a stock solution of 12.0 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 175 mL of the dilute... more
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10/24/20

Titration: Molarity of Acid or Base
An aqueous solution of hydrochloric acid is standardized by titration with a 0.175 M solution of calcium hydroxide.If 25.3 mL of base are required to neutralize 16.4 mL of the acid, what is the... more
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10/24/20

Titration: Molarity of Acid or Base
An aqueous solution of potassium hydroxide is standardized by titration with a 0.196 M solution of hydrochloric acid.If 21.9 mL of base are required to neutralize 25.0 mL of the acid, what is the... more
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10/24/20

Molarity: Ion Concentration
In the laboratory you dissolve 23.8 g of chromium(III) sulfate in a volumetric flask and add water to a total volume of 250 mL.What is the molarity of the solution?  M.What is the concentration of... more
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10/24/20

Molarity: Ion Concentration
In the laboratory you dissolve 20.3 g of barium acetate in a volumetric flask and add water to a total volume of 375 mL.What is the molarity of the solution?   M.What is the concentration of... more
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10/24/20

Combustion Analysis
When 6.508 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 20.42 grams of CO2 and 8.361 grams of H2O were produced.In a separate experiment, the molar mass of the... more
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10/24/20

Combustion analysis
A 9.418 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 15.69 grams of CO2 and 5.138 grams of H2O are produced.In a separate experiment, the molar... more
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10/24/20

The emission spectrum from atoms and molecules
a. Occurs only in the visible region of the electromagnetic spectrumb. Is a discrete spectrum that is unique to each atom or moleculec. Is a continuous spectrumd. Is a descrete spectrum that is the... more
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10/24/20

The value of ni if the observed wavelength is 657 nm is
The value of ni if the observed wavelength is 657 nm isa. 4b. 2c. 5d. 3 I think the answer is b. 2, since 657 nm is part of the Balmer Series (to n=2)
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