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Question
The α helix of the secondary structure of a protein is held together by ________ between two widely separated parts of a protein chain.A) hydrogen bonds
B) disulfide bridges
C) salt bridges
D) hydrophilic interactions
E) hydrophobic interactions
Answer
This answer is hidden. It contains 1 characters.
Related questions
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Identify the Brnsted-Lowry acids in the following reaction.H2O + CO32- ->HCO3- + OH-A) H2O/HCO3-B) CO32-/HCO3-C) OH-/HCO3-D) CO32-/OH-E) H2CO3/H2O
Q:
According to the Brnsted-Lowry definition,
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B) a base produces H+ ions in aqueous solutions.
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A catalyst lowers the activation energy of a chemical reaction.
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For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. Bromine can be liquefied easily and removed from the reaction vessel as it is formed. If this is done, how will it affect the equilibrium reaction?2NOBr(g) -> 2NO(g) + Br2(g)A) More products will be made as Br2 is removed.B) There will be a larger proportion NOBr in the vessel when equilibrium is reached.C) Less NO will be made.D) The pressure in the vessel will increase.E) The equilibrium constant will change.
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In an exothermic reaction, heat can be considered a
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In the reaction of nitrogen gas with oxygen gas to produce nitrogen oxide, what is the effect of adding more oxygen gas to the initial reaction mixture? The reaction is shown below.N2(g) + O2(g) -> 2NO(g)A) The equilibrium shifts to produce more N2.B) The equilibrium shifts to produce more NO.C) The equilibrium is not affected.D) Extra catalyst is required to reach equilibrium.E) The temperature of the reaction mixture is raised.
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When a reaction is at equilibrium,
A) all reaction stops.
B) no more reactants are converted to products.
C) the reaction is no longer reversible.
D) the forward and reverse reactions occur at the same rate.
E) the products and reactants have the same energy content.
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A chemical reaction has reached equilibrium when
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Q:
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Using a kidney machine to remove waste products from the blood is known as ________.
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Methanol, CH3OH, can be classified as a ________.
A) gas
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Q:
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Q:
0.50 mole of KCl is added to 2.0 kg of water. The boiling point of the solution will be ________ the boiling point of pure water.
A) higher than
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B) starch outside
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D) water inside only
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Q:
Which solution is isotonic to a red blood cell?
A) water
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C) 2% glucose
D) 0.9% NaCl
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Q:
During the process of diluting a solution to a lower concentration,
A) the amount of solute does not change.
B) the amount of solvent does not change.
C) there is more solute in the concentrated solution.
D) the volume of the solution does not change.
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Q:
What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?
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When 200. mL of water are added to 100. mL of 12% KCl solution the final concentration of KCl is (Assume the volumes add.)
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Q:
An increase in the temperature of a solution usually
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B) increases the solubility of a gas in the solution.
C) increases the solubility of a solid solute in the solution.
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Q:
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Q:
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Q:
When KCl dissolves in water
A) the Cl- ions are attracted to dissolved K+ ions.
B) the Cl- ions are attracted to the partially negative oxygen atoms of the water molecule.
C) the K+ ions are attracted to Cl- ions on the KCl crystal.
D) the K+ ions are attracted to the partially negative oxygen atoms of the water molecule.
E) the K+ ions are attracted to the partially positive hydrogen atoms of the water molecule.
Q:
A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is the
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B) solvent.
C) solution.
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E) ionic compound.
Q:
Which of the following molecules can form hydrogen bonds?
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Q:
STP stands for 25 C and 760 mmHg.