Biochemistry Exam 3: Practice Exam

Biochemistry (Exam 3): Practice Exam

Questions and Verified Answers, 100% Guarantee Pass (Latest 2025)

• Which of the following lipid molecules possess a different

fundamental structural make-up from the others?

• Fatty acids
• Cholesterol
• Triglycerides
• Sphingolipids
• Glycolipids - Correct Answers ✅b. (cholesterol)
• What does amphipathic mean?
• having both positive and negative charges
• having both acid and base properties
• having both hydrophilic and hydrophobic regions
• having two stereoisomers - Correct Answers ✅c. (having

both hydrophilic and hydrophobic regions)

• Which of the following four fatty acids has the lowest

melting point?

• CH3CH2CH2CH2CH2COOH
• CH3CH2CH2CH2CH2CH2CH2CH2CH2COOH
• CH3CH2CH2CH2CH2CH2CH2COOH
• CH3CH=CHCH2CH2COOH - Correct Answers ✅d.

(CH3CH=CHCH2CH2COOH) 1 / 2

Biochemistry (Exam 3): Practice Exam

Questions and Verified Answers, 100% Guarantee Pass (Latest 2025)

• How does the presence of cis double bonds in fatty acids

affect membrane fluidity?

• They tend to increase the fluidity.
• They tend to decrease the fluidity.
• They don't have any specific effect on fluidity.
• None of the above
• The association of membrane - Correct Answers ✅a.

(They tend to increase the fluidity.)

• The association of membrane proteins with lipids in the

membrane bilayer always

involves:

• electrostatic interactions
• hydrophobic interactions
• all of the above
• None of the above - Correct Answers ✅c. (all of the

above)

• The nucleotide sequence of DNA is which level of

structure?

• primary
• secondary
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