PORTAGE LEARNING CHEM 210
BIOCHEMISTRY FINAL EXAM
2026/2027 WITH 130 QUESTIONS AND
EXPERT-VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS
In human cells, amino acids are degraded to ammonium NH4+ and carbon
skeletons. How is the nitrogen then further processed and excreted from these cell?
- ANSWER-Nitrogen is processed separately from carbon and oxygen in the urea
cycle. The urea cycle is a 4-step cyclic process that converts NH4+ to urea, which
can then be excreted from the body. Once nitrogen has been removed from an
amino acid through oxidative deamination, NH4+ is converted to carbamoyl-
phosphate by carbamoyl phosphate synthetase 1 in the mitochondrial matrix. The
nitrogen can then enter the urea cycle as carbamoyl-phosphate in which it produces
urea that contains two atoms of nitrogen in the cytosol. The urea is then excreted.
,What element is the basis for life? Describe at least 2 properties of this element
that permit it to serve as the basis for life. - ANSWER-Carbon is described as the
element that is the basis for life due its ability to form:
- covalent bonds with different elements as well as form double and triple bonds
with other carbon atoms and elements, such as N and O
- structures known as polymers, which are long chains of carbon-carbon bonds.
- cyclic structures called cyclic compounds
Which types of molecules are most likely to be present in membranes? -
ANSWER-Phospholipids, sphingolipids, cholesterol, and proteins are all most
likely to be present in membranes. According to the fluid mosaic model, these
molecule work together to form a bilayer membrane through association with each
other.
A group of molecules form a clathrate. What is a clathrate and why does it form? -
ANSWER-A clathrate is a cage structure that forms around a substance that has
been placed in water as a result of the hydrophobic effect. Water orders itself
around the hydrophobic portion of non-polar regions of a substance to maximize
hydrogen bonds. The formation of this structure occurs due to the spontaneous
drive of water to bind to itself through hydrogen bonds.
What is the fluid mosaic model and what features of the cell does it help us
understand? - ANSWER-The fluid mosaic model is used to described membrane
composition. The membrane bilayer contains a mixture of proteins and lipid that
interact to maintain life within the cell. Individual membrane molecules are free-
moving, which allows the membrane to move and flow while maintaining its
shape.
T/F: According to the module, a compound with a molecular mass of 1,000 g/mol
is considered a macromolecule. - ANSWER-false
, macromolecule >5,000 g/mol
T/F: Biomolecules can have two or more different functional groups. - ANSWER-
true
T/F: The following group is an amine.
C2H5NH2 - ANSWER-true
T/F: In a eukaryotic cell, the organelles called peroxisomes serve the purpose of
digesting macromolecules. - ANSWER-false
peroxisomes degrade dangerous/hazardous molecules, lysosomes degrade
macromolecules
T/F: In a eukaryotic cell, the organelles called lysosomes serve the purpose of
digesting macromolecules. - ANSWER-true
T/F: Carbon dioxide has a linear molecular shape AND has a bond angle of 109.5
degrees. - ANSWER-false
linear shape = 180 degrees
Of the following, ___ is not a property of carbon.
Forming ionic bonds
Forming cyclic structures
BIOCHEMISTRY FINAL EXAM
2026/2027 WITH 130 QUESTIONS AND
EXPERT-VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS
In human cells, amino acids are degraded to ammonium NH4+ and carbon
skeletons. How is the nitrogen then further processed and excreted from these cell?
- ANSWER-Nitrogen is processed separately from carbon and oxygen in the urea
cycle. The urea cycle is a 4-step cyclic process that converts NH4+ to urea, which
can then be excreted from the body. Once nitrogen has been removed from an
amino acid through oxidative deamination, NH4+ is converted to carbamoyl-
phosphate by carbamoyl phosphate synthetase 1 in the mitochondrial matrix. The
nitrogen can then enter the urea cycle as carbamoyl-phosphate in which it produces
urea that contains two atoms of nitrogen in the cytosol. The urea is then excreted.
,What element is the basis for life? Describe at least 2 properties of this element
that permit it to serve as the basis for life. - ANSWER-Carbon is described as the
element that is the basis for life due its ability to form:
- covalent bonds with different elements as well as form double and triple bonds
with other carbon atoms and elements, such as N and O
- structures known as polymers, which are long chains of carbon-carbon bonds.
- cyclic structures called cyclic compounds
Which types of molecules are most likely to be present in membranes? -
ANSWER-Phospholipids, sphingolipids, cholesterol, and proteins are all most
likely to be present in membranes. According to the fluid mosaic model, these
molecule work together to form a bilayer membrane through association with each
other.
A group of molecules form a clathrate. What is a clathrate and why does it form? -
ANSWER-A clathrate is a cage structure that forms around a substance that has
been placed in water as a result of the hydrophobic effect. Water orders itself
around the hydrophobic portion of non-polar regions of a substance to maximize
hydrogen bonds. The formation of this structure occurs due to the spontaneous
drive of water to bind to itself through hydrogen bonds.
What is the fluid mosaic model and what features of the cell does it help us
understand? - ANSWER-The fluid mosaic model is used to described membrane
composition. The membrane bilayer contains a mixture of proteins and lipid that
interact to maintain life within the cell. Individual membrane molecules are free-
moving, which allows the membrane to move and flow while maintaining its
shape.
T/F: According to the module, a compound with a molecular mass of 1,000 g/mol
is considered a macromolecule. - ANSWER-false
, macromolecule >5,000 g/mol
T/F: Biomolecules can have two or more different functional groups. - ANSWER-
true
T/F: The following group is an amine.
C2H5NH2 - ANSWER-true
T/F: In a eukaryotic cell, the organelles called peroxisomes serve the purpose of
digesting macromolecules. - ANSWER-false
peroxisomes degrade dangerous/hazardous molecules, lysosomes degrade
macromolecules
T/F: In a eukaryotic cell, the organelles called lysosomes serve the purpose of
digesting macromolecules. - ANSWER-true
T/F: Carbon dioxide has a linear molecular shape AND has a bond angle of 109.5
degrees. - ANSWER-false
linear shape = 180 degrees
Of the following, ___ is not a property of carbon.
Forming ionic bonds
Forming cyclic structures
