Lehninger Biochemistry Chapter 2 Questions And Answers Latest Top Score.
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Lehninger Biochemistry Chapter 2
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Lehninger Biochemistry Chapter 2
Lehninger Biochemistry Chapter 2 Questions And Answers Latest Top Score.
Which of these statements about hydrogen bonds is not true?
A) Hydrogen bonds account for the anomalously high boiling point of water.
B) In liquid water, the average water molecule forms hydrogen bonds wi...
Lehninger Biochemistry Chapter 2
Questions And Answers Latest Top Score.
Which of these statements about hydrogen bonds is not true?
A) Hydrogen bonds account for the anomalously high boiling point of water.
B) In liquid water, the average water molecule forms hydrogen bonds with three to four
other water molecules.
C) Individual hydrogen bonds are much weaker than covalent bonds.
D) Individual hydrogen bonds in liquid water exist for many seconds and sometimes for
minutes.
E) The strength of a hydrogen bond depends on the linearity of the three atoms involved
in the bond. - correct answer. D) Individual hydrogen bonds in liquid water exist for
many seconds and sometimes for minutes.
A true statement about hydrophobic interactions is that they:
A) are the driving force in the formation of micelles of amphipathic compounds in water.
B) do not contribute to the structure of water-soluble proteins.
C) have bonding energies of approximately 20-40 Kjoule per mole.
D) involve the ability of water to denature proteins.
E) primarily involve the effect of polar solutes on the entropy of aqueous systems. -
correct answer. A) are the driving force in the formation of micelles of amphipathic
compounds in water.
Hydrophobic interactions make important energetic contributions to:
A) binding of a hormone to its receptor protein.
B) enzyme-substrate interactions.
C) membrane structure.
D) three-dimensional folding of a polypeptide chain.
E) all of the above are true. - correct answer. E) all of the above are true.
, Dissolved solutes alter some physical (colligative) properties of the solvent water
because they change the:
A) concentration of the water.
B) hydrogen bonding of the water.
C) ionic bonding of the water.
D) pH of the water.
E) temperature of the water. - correct answer. A) concentration of the water.
Osmosis is movement of a:
A) charged solute molecule (ion) across a membrane.
B) gas molecule across a membrane.
C) nonpolar solute molecule across a membrane.
D) polar solute molecule across a membrane.
E) water molecule across a membrane. - correct answer. E) water molecule across a
membrane.
A hydronium ion:
A) has the structure H3O+.
B) is a hydrated hydrogen ion.
C) is a hydrated proton.
D) is the usual form of one of the dissociation products of water in solution.
E) all of the above are true. - correct answer. E) all of the above are true.
The pH of a solution of 1 M HCl is:
A) 0
B) 0.1
C) 1
D) 10
E) -1 - correct answer. A) 0
The pH of a solution of 0.1 M NaOH is:
A) 0.1
B) 1.0
C) 12.8
D) 13
E) 14 - correct answer. D) 13
Which of the following is true about the properties of aqueous solutions?
A) A pH change from 5.0 to 6.0 reflects an increase in the hydroxide ion concentration
([OH-]) of 20%.
B) A pH change from 8.0 to 6.0 reflects a decrease in the proton concentration ([H+]) by
a factor of 100.
C) Charged molecules are generally insoluble in water.
D) Hydrogen bonds form readily in aqueous solutions.
E) The pH can be calculated by adding 7 to the value of the pOH. - correct answer. D)
Hydrogen bonds form readily in aqueous solutions.
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