1,708 Answered Questions for the topic biochemistry

03/30/20

Chemistry question about buffers
Which sets of substances can act as buffers? Select all that are correct. NH3 and NH4Cl HNO2 and NaNO2 NaOH and NaCl NH3 and HCl HCl and NaCl I would like understand why some substances can... more
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03/30/20

Chemistry question about properties of acids.
What properties do acids have in common? Select all that apply. They are caused by acid rain. They make some pigments change color. They are all solid substances. They react with metals to form... more
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03/29/20

Chemistry question about colligative properties
Colligative properties are properties of solutions that depend on __________________ . only the number of ions dissolved whether the solute is an electrolyte or a non-electrolyte the charges of the... more
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03/29/20

Chemistry question about solutions
Why do we use salt on ice in cold weather? The combination increases the boiling point of the ice, making it melt faster. The combination increases the vapor pressure of the ice, so it evaporates... more
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03/28/20

Chemistry question about solutions

Select the best term that completes this statement: Solvents dissolve solutes because the two substances have ________________ intermolecular... more
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03/27/20

Chemistry question about basis of dilution
The fundamental basis of the dilution equation is the idea that ______________________ . the amount of solute stays constant. the amount of solvent stays constant the solute is soluble in any... more
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03/27/20

Chemistry question about solutions (acid and basic)
What ultimately occurs in the ionization process of a weak acid or base? It eventually reverses completely to reform the un-ionized acid or base molecules It eventually goes 100% to completion. It... more
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03/27/20

Chemistry question about chemical equilibrium
Why is a chemical equilibrium considered a dynamic equilibrium? Because both forward and reverse reactions continue, even though there is no net change. Because there is no net change in the... more
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03/26/20

Chemistry MATH Question 1
A rate is equal to 0.0200 M/s. If [A] = 0.100 M and rate = k[A]0[B]2, what is the new rate if the concentration of [A] is increased to 0.200 M?
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03/25/20

How is a balanced chemical equation similar to a recipe? Explain and give examples.
Please explain it clearly for me. I really need help.
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Biochemistry Biology Physiology Mcat

03/21/20

Why do people get varicose veins
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Biochemistry

03/14/20

Biochemistry for NBDE
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Biochemistry

03/14/20

Which of the following statements is FALSE?

a. Enzymes speed up the attainment of a reaction equilibrium. b. Enzymes make reactions 10^3 to 10^20 times faster. c. Enzymes are chemically unchanged during the actual catalytic process. d.... more
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Biochemistry

03/14/20

In an enzyme reaction involving one enzyme and one substrate, the rate of the reaction depends on

a. both substrate and enzyme concentrations. b. enzyme concentration. c. the enzyme concentration at first and the substrate concentration later on. d. substrate concentration. e. All of the above... more
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Biochemistry

03/14/20

An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation?

a. The inhibition must be irreversible. b. It could be noncompetitive or uncompetitive inhibition. c. It must be a competitive inhibitor. d. It could be irreversible, competitive, noncompetitive or... more
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Biochemistry

03/14/20

What is the effect of incubating a mixture of RNA and DNA with 0.1 M NaOH?
a. DNA is hydrolyzed to nucleoside monophosphates.b. No effect. RNA and DNA are resistant to base hydrolysis.c. RNA is hydrolyzed to nucleoside monophosphates.d. Both RNA and DNA are hydrolyzed to... more
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02/27/20

How many bacteria will be there if the starting number of bacteria is 2 and the total time is 2 hrs. Generation time is 20 minutes
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Biochemistry Chemistry

02/26/20

Calculate the mass/volume percent (m/v) of 25.0 g g NaCl in 58.0 mL of solution.
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Biochemistry Chemistry

02/26/20

Vinegar is a solution of acetic acid in water. If a 145 mL bottle of distilled vinegar contains 27.2 mL of acetic acid, what is the volume percent (v/v) of the solution?
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Biochemistry Chemistry

02/26/20

Calculate the mass percent (m/m) of a solution prepared by dissolving 46.41 g g of NaCl in 168.8 g of .
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Biochemistry Chemistry

02/26/20

The sedative Demerol hydrochloride has the formula C15H22ClNO2 . How many grams are in 0.030 moles of Demerol hydrochloride?
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Biochemistry Chemistry

02/26/20

Cyclopropane, C3H6 , is an anesthetic given by inhalation. How many grams are in 0.27 moles of cyclopropane?
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Biochemistry Chemistry

02/26/20

270. mLof a 3.05 M NaNO3 solution
Calculate the grams of solute needed to prepare
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02/23/20

Electron Withdrawing vs Electron Donating groups
Hello, could someone please explain how to determine if an R group is more electron withdrawing or donating in a benzene ring (e.g. phenols etc.) (especially explain if oxygen is electrowithdraw or... more
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Biochemistry Organic Chemistry

02/22/20

whats the running pressure in torr?
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals... more
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