BIO 93 MIDTERM REVIEW QUESTIONS AND ANSWERS UPDATED 2025/2026 A
COMPLETE SOLUTION WITH 100% CORRECT VERIFIED ANSWERS RATED A+ FOR
PASS
Which of the following statements is not true? - CORRECT ANSWERS Hydrophobic
compounds contain polar covalent bonds.
-Hydrophobic compounds contain nonpolar covalent bonds rather than polar covalent bonds.
These nonpolar covalent bonds make it repel water molecules.
Which of the following is a type of lipid? (select all that apply) - CORRECT ANSWERS a.
Fats
b. Phospholipids
c. Steroids
-Fats, phospholipids, and steroids are types of lipids. Fats are essential for long-term energy
storage and insulation, phospholipids are crucial for cell membrane structure and function, and
steroids play significant roles in various physiological processes.
What is the primary role of cellulose in plants? - CORRECT ANSWERS Structural support
-Cellulose is a major component of plant cell walls, providing rigidity and strength to the cell
structure, and allowing plants to maintain their shape.
What is the main function of phospholipids in biological systems? - CORRECT ANSWERS
Cell structure and membrane formation
, BIO 93 MIDTERM REVIEW QUESTIONS AND ANSWERS UPDATED 2025/2026 A
COMPLETE SOLUTION WITH 100% CORRECT VERIFIED ANSWERS RATED A+ FOR
PASS
-Phospholipids are a vital component of cell membranes, contributing to their structural
integrity and selectively permeable nature, which regulates the passage of substances into and
out of the cell.
Match the following simple chemical descriptions with their appropriate names: - CORRECT
ANSWERS A. Contains double-bonded oxygen. (Ketone)
B. Contains a hydroxyl group. (Alcohol)
C. Contains an amino group. (Amine)
D. Contains a carboxyl group. (Carboxylic Acid)
E. Contains both oxygen and an alkyl group. (Ester)
F. Contains only one oxygen and an alkyl group. (Aldehyde)
Aldehyde
Ketone
Amine
Carboxylic Acid
Ester
Alcohol - CORRECT ANSWERS Functional groups are specific groups of atoms or bonds
within molecules that are responsible for the characteristic chemical reactions of those
molecules. (You should memorize the 7 functional groups and their properties mentioned in the
lecture slides.)
Identify the steps of the protein folding from the figure below and state the types of bonds
involved in each step - CORRECT ANSWERS A: (Primary Structure): The linear sequence
of amino acids in the polypeptide chain, which is stabilized by peptide bonds.
B: (Secondary Structure): The formation of alpha helices and beta sheets through hydrogen
bonding between nearby amino acids along the polypeptide backbone.
COMPLETE SOLUTION WITH 100% CORRECT VERIFIED ANSWERS RATED A+ FOR
PASS
Which of the following statements is not true? - CORRECT ANSWERS Hydrophobic
compounds contain polar covalent bonds.
-Hydrophobic compounds contain nonpolar covalent bonds rather than polar covalent bonds.
These nonpolar covalent bonds make it repel water molecules.
Which of the following is a type of lipid? (select all that apply) - CORRECT ANSWERS a.
Fats
b. Phospholipids
c. Steroids
-Fats, phospholipids, and steroids are types of lipids. Fats are essential for long-term energy
storage and insulation, phospholipids are crucial for cell membrane structure and function, and
steroids play significant roles in various physiological processes.
What is the primary role of cellulose in plants? - CORRECT ANSWERS Structural support
-Cellulose is a major component of plant cell walls, providing rigidity and strength to the cell
structure, and allowing plants to maintain their shape.
What is the main function of phospholipids in biological systems? - CORRECT ANSWERS
Cell structure and membrane formation
, BIO 93 MIDTERM REVIEW QUESTIONS AND ANSWERS UPDATED 2025/2026 A
COMPLETE SOLUTION WITH 100% CORRECT VERIFIED ANSWERS RATED A+ FOR
PASS
-Phospholipids are a vital component of cell membranes, contributing to their structural
integrity and selectively permeable nature, which regulates the passage of substances into and
out of the cell.
Match the following simple chemical descriptions with their appropriate names: - CORRECT
ANSWERS A. Contains double-bonded oxygen. (Ketone)
B. Contains a hydroxyl group. (Alcohol)
C. Contains an amino group. (Amine)
D. Contains a carboxyl group. (Carboxylic Acid)
E. Contains both oxygen and an alkyl group. (Ester)
F. Contains only one oxygen and an alkyl group. (Aldehyde)
Aldehyde
Ketone
Amine
Carboxylic Acid
Ester
Alcohol - CORRECT ANSWERS Functional groups are specific groups of atoms or bonds
within molecules that are responsible for the characteristic chemical reactions of those
molecules. (You should memorize the 7 functional groups and their properties mentioned in the
lecture slides.)
Identify the steps of the protein folding from the figure below and state the types of bonds
involved in each step - CORRECT ANSWERS A: (Primary Structure): The linear sequence
of amino acids in the polypeptide chain, which is stabilized by peptide bonds.
B: (Secondary Structure): The formation of alpha helices and beta sheets through hydrogen
bonding between nearby amino acids along the polypeptide backbone.
