BIOCHEMISTRY ACTUAL EXAM 2026 WITH
PREP EXAM QUESTIONS AND 100%
CORRECT ANSWERS | ALREADY GRADED
A+ | GUARANTEED PASS | BIOCHEMISTRY
EXAM LATEST 2026
Which of the bonds listed below would be the weakest?
A. a simple carbon-carbon double bond D. a carbon-oxygen double bond B. a
carbon-carbon bond in an aromatic ring E. a hydrogen bond C. a carbon-carbon
single bond - ANSWER- E. a Hydrogen Bond
On comparing the molecular weight of a free amino acid in solution with that of
the same amino acid as a nonterminal residue in a protein, one finds that
A. the free amino acid exceeds the residue weight by 18 daltons. B. the residue's
weight exceeds that of the free amino acid by 18 daltons. C. the difference depends
on which amino acid one considers. D. the free amino acid and the residue have the
,same weight. E. none of the above is true. - ANSWER- A. the free animo acid
exceeds the residue weight by 18 daltons (mols/ gram)
The "hard sphere" behavior of the atoms in biological molecules - in all molecules
for that matter - arises from
A. the interactions of ionic groups with one another B. the third power dependence
on the interatomic distance of interactions between permanent dipoles C. the
twelfth power dependence on the interatomic distance of interactions of
overlapping electron clouds. D. the fact that pi clouds are easily polarized by
nearby charged groups E. none of the above - ANSWER- C. the twelfth power
dependence on the interatomic distance of interactions of overlapping electron
clouds
When a weak monoprotic acid is titrated with one half mole of base per mole of
acid,
A. the pH = the pI D. the pI = the pKa B. [HA] = [A-] E. none of the above C. the
pH = the pKa - ANSWER- C. the ph= the pKa
The molecular weight of hemoglobin is 64,500 daltons. A single molecule of the
protein contains 574 amino acid residues. The molecular weight of collagen is
336,000 daltons. Estimate the number of amino acid residues in a single molecule
of collagen.
A. 4,464 B. 112 C. 585 D. 336,000 E. 3,000 - ANSWER- E. 3000
When an organism dies, what happens to the entropy of its components?
A. It decreases. C. It remains unchanged. E. Cannot tell without further
information. B. It increases. D. Death and entropy have nothing to do with one
another. - ANSWER- B. It increases
,The dielectric constant of some parts of the protein interior is approximately 10,
while that of water is 80. Where would the repulsive interaction between two
positively charged groups be greatest?
A. in the part of the protein interior of dielectric constant 10 B. in bulk water C. at
the surface of the protein D. The dielectric constant has nothing to do with the
matter. E. Cannot tell from data given. - ANSWER- A. in the part of the protein
interior of dielevtric constant 10.
During embryological development from a fertilized egg to birth (or hatching),
what happens to the entropy of the substances which become the new organism?
A. It decreases. C. It remains unchanged. E. Cannot tell without further
information. B. It increases. D. Birth and entropy have nothing to do with one
another. - ANSWER- A. It decreases
Which will show the greater degree of dissociation: formic acid (pKa = 3.75) or
acetic acid (pKa = 4.76) if dissolved in water at 0.1 M concentrations?
A. Formic acid C. Within the accuracy of measurement they will be equally
dissociated. B. Acetic acid D. Cannot tell from data given. - ANSWER- A. Formic
acid
Which will show the greater degree of dissociation: formic acid (pKa = 3.75) or
acetic acid (pKa = 4.76) if dissolved at 0.1 M concentrations in solutions whose pH
is 11.0?
A. Formic acid C. Within the accuracy of measurement they will be equally
dissociated. B. Acetic acid D. Cannot tell from data given. - ANSWER- C. Within
the accuracy of measurement they will be equally dissociated.
Which of the following experimental observations disproved the vitalist claim that
the substances of which living matter is composed are qualitatively different from
those which compose the non-living world?
A. the demonstration by the Buchner brothers that broken and therefore dead yeast
, cells could convert sugar into ethanol B. the crystallization by Sumner of the
enzyme urease C. Pasteur's proof that living organisms arise only from other living
PREP EXAM QUESTIONS AND 100%
CORRECT ANSWERS | ALREADY GRADED
A+ | GUARANTEED PASS | BIOCHEMISTRY
EXAM LATEST 2026
Which of the bonds listed below would be the weakest?
A. a simple carbon-carbon double bond D. a carbon-oxygen double bond B. a
carbon-carbon bond in an aromatic ring E. a hydrogen bond C. a carbon-carbon
single bond - ANSWER- E. a Hydrogen Bond
On comparing the molecular weight of a free amino acid in solution with that of
the same amino acid as a nonterminal residue in a protein, one finds that
A. the free amino acid exceeds the residue weight by 18 daltons. B. the residue's
weight exceeds that of the free amino acid by 18 daltons. C. the difference depends
on which amino acid one considers. D. the free amino acid and the residue have the
,same weight. E. none of the above is true. - ANSWER- A. the free animo acid
exceeds the residue weight by 18 daltons (mols/ gram)
The "hard sphere" behavior of the atoms in biological molecules - in all molecules
for that matter - arises from
A. the interactions of ionic groups with one another B. the third power dependence
on the interatomic distance of interactions between permanent dipoles C. the
twelfth power dependence on the interatomic distance of interactions of
overlapping electron clouds. D. the fact that pi clouds are easily polarized by
nearby charged groups E. none of the above - ANSWER- C. the twelfth power
dependence on the interatomic distance of interactions of overlapping electron
clouds
When a weak monoprotic acid is titrated with one half mole of base per mole of
acid,
A. the pH = the pI D. the pI = the pKa B. [HA] = [A-] E. none of the above C. the
pH = the pKa - ANSWER- C. the ph= the pKa
The molecular weight of hemoglobin is 64,500 daltons. A single molecule of the
protein contains 574 amino acid residues. The molecular weight of collagen is
336,000 daltons. Estimate the number of amino acid residues in a single molecule
of collagen.
A. 4,464 B. 112 C. 585 D. 336,000 E. 3,000 - ANSWER- E. 3000
When an organism dies, what happens to the entropy of its components?
A. It decreases. C. It remains unchanged. E. Cannot tell without further
information. B. It increases. D. Death and entropy have nothing to do with one
another. - ANSWER- B. It increases
,The dielectric constant of some parts of the protein interior is approximately 10,
while that of water is 80. Where would the repulsive interaction between two
positively charged groups be greatest?
A. in the part of the protein interior of dielectric constant 10 B. in bulk water C. at
the surface of the protein D. The dielectric constant has nothing to do with the
matter. E. Cannot tell from data given. - ANSWER- A. in the part of the protein
interior of dielevtric constant 10.
During embryological development from a fertilized egg to birth (or hatching),
what happens to the entropy of the substances which become the new organism?
A. It decreases. C. It remains unchanged. E. Cannot tell without further
information. B. It increases. D. Birth and entropy have nothing to do with one
another. - ANSWER- A. It decreases
Which will show the greater degree of dissociation: formic acid (pKa = 3.75) or
acetic acid (pKa = 4.76) if dissolved in water at 0.1 M concentrations?
A. Formic acid C. Within the accuracy of measurement they will be equally
dissociated. B. Acetic acid D. Cannot tell from data given. - ANSWER- A. Formic
acid
Which will show the greater degree of dissociation: formic acid (pKa = 3.75) or
acetic acid (pKa = 4.76) if dissolved at 0.1 M concentrations in solutions whose pH
is 11.0?
A. Formic acid C. Within the accuracy of measurement they will be equally
dissociated. B. Acetic acid D. Cannot tell from data given. - ANSWER- C. Within
the accuracy of measurement they will be equally dissociated.
Which of the following experimental observations disproved the vitalist claim that
the substances of which living matter is composed are qualitatively different from
those which compose the non-living world?
A. the demonstration by the Buchner brothers that broken and therefore dead yeast
, cells could convert sugar into ethanol B. the crystallization by Sumner of the
enzyme urease C. Pasteur's proof that living organisms arise only from other living
