CHEM 210 BIOCHEMISTRY FINAL
EXAM PREPARATION QUESTIONS AND
ANSWERS 2026/2027 UPDATE || 100%
GUARANTEED PASS
1. Which of the following best describes a saturated fatty acid?
A. It contains one or more double bonds in the hydrocarbon chain.
B. It has no double bonds between carbon atoms in the hydrocarbon chain.
C. It is liquid at room temperature due to kinks in the chain.
D. It primarily functions as a signaling molecule rather than energy storage.
Answer: B
Conceptual Explanation: Saturated fatty acids are ‘saturated’ with hydrogen atoms,
meaning they have no double bonds in their hydrocarbon tails, leading to straight chains
that pack tightly.
2. Triacylglycerols are primarily stored in which type of tissue in mammals?
A. Liver tissue
B. Muscle tissue
C. Adipose tissue
D. Nervous tissue
,Answer: C
Conceptual Explanation: Adipose tissue (fat cells) is the specialized connective tissue that
stores energy in the form of triacylglycerols.
3. How does cholesterol affect membrane fluidity at high temperatures?
A. It decreases fluidity by restricting the movement of phospholipid fatty acid chains.
B. It increases fluidity by disrupting phospholipid packing.
C. It has no effect on membrane fluidity at high temperatures.
D. It causes the membrane to undergo a phase transition to a solid state.
Answer: A
Conceptual Explanation: Cholesterol acts as a fluidity buffer; at high temperatures, it
stabilizes the membrane and raises the melting point, decreasing fluidity.
4. Which type of membrane protein is deeply embedded in the lipid bilayer and can only be
removed by detergents?
A. Peripheral proteins
B. Integral proteins
C. Extrinsic proteins
D. Lipid-anchored proteins
Answer: B
, Conceptual Explanation: Integral proteins span the bilayer or are deeply embedded; they
require detergents to disrupt the hydrophobic interactions keeping them in the membrane.
5. The Na+/K+ ATPase pump is an example of which transport mechanism?
A. Simple diffusion
B. Facilitated diffusion
C. Primary active transport
D. Secondary active transport
Answer: C
Conceptual Explanation: The Na+/K+ ATPase uses the direct hydrolysis of ATP to move
ions against their concentration gradients, defining it as primary active transport.
6. Which molecule serves as the structural backbone for all sphingolipids?
A. Glycerol
B. Sphingosine
C. Cholesterol
D. Phosphate
Answer: B
Conceptual Explanation: Sphingolipids are characterized by having a sphingosine
backbone, which is an amino alcohol, rather than the glycerol backbone found in
phosphoglycerides.
EXAM PREPARATION QUESTIONS AND
ANSWERS 2026/2027 UPDATE || 100%
GUARANTEED PASS
1. Which of the following best describes a saturated fatty acid?
A. It contains one or more double bonds in the hydrocarbon chain.
B. It has no double bonds between carbon atoms in the hydrocarbon chain.
C. It is liquid at room temperature due to kinks in the chain.
D. It primarily functions as a signaling molecule rather than energy storage.
Answer: B
Conceptual Explanation: Saturated fatty acids are ‘saturated’ with hydrogen atoms,
meaning they have no double bonds in their hydrocarbon tails, leading to straight chains
that pack tightly.
2. Triacylglycerols are primarily stored in which type of tissue in mammals?
A. Liver tissue
B. Muscle tissue
C. Adipose tissue
D. Nervous tissue
,Answer: C
Conceptual Explanation: Adipose tissue (fat cells) is the specialized connective tissue that
stores energy in the form of triacylglycerols.
3. How does cholesterol affect membrane fluidity at high temperatures?
A. It decreases fluidity by restricting the movement of phospholipid fatty acid chains.
B. It increases fluidity by disrupting phospholipid packing.
C. It has no effect on membrane fluidity at high temperatures.
D. It causes the membrane to undergo a phase transition to a solid state.
Answer: A
Conceptual Explanation: Cholesterol acts as a fluidity buffer; at high temperatures, it
stabilizes the membrane and raises the melting point, decreasing fluidity.
4. Which type of membrane protein is deeply embedded in the lipid bilayer and can only be
removed by detergents?
A. Peripheral proteins
B. Integral proteins
C. Extrinsic proteins
D. Lipid-anchored proteins
Answer: B
, Conceptual Explanation: Integral proteins span the bilayer or are deeply embedded; they
require detergents to disrupt the hydrophobic interactions keeping them in the membrane.
5. The Na+/K+ ATPase pump is an example of which transport mechanism?
A. Simple diffusion
B. Facilitated diffusion
C. Primary active transport
D. Secondary active transport
Answer: C
Conceptual Explanation: The Na+/K+ ATPase uses the direct hydrolysis of ATP to move
ions against their concentration gradients, defining it as primary active transport.
6. Which molecule serves as the structural backbone for all sphingolipids?
A. Glycerol
B. Sphingosine
C. Cholesterol
D. Phosphate
Answer: B
Conceptual Explanation: Sphingolipids are characterized by having a sphingosine
backbone, which is an amino alcohol, rather than the glycerol backbone found in
phosphoglycerides.
