BIOL121 / BIOL 121 Module 1 - 6 EXAMS WITH
SIMPLIFIED RATIONALES AND MULTIPLE CHOICES |
GRADED A+ | 100 % GUARANTEED | 2025 -2026 |
BRANDNEW !!!!
Question: Which of the following is a characteristic of prokaryotes?
A) Multiple membrane-bound organelles
B) Nucleus containing genetic material
C) Single-celled organisms with no nucleus
D) Presence of mitochondria
Answer: C) Single-celled organisms with no nucleus
Rationale: Prokaryotes, including bacteria and archaea, lack a nucleus and membrane-
bound organelles.
Question: Eukaryotes are distinguished from prokaryotes by:
A) Being unicellular
B) Having no organelles
C) Possessing an inner and outer membrane and organelles
D) Containing only DNA
Answer: C) Possessing an inner and outer membrane and organelles
Rationale: Eukaryotic cells have organelles like the nucleus and mitochondria and are
often multicellular.
Question: In Homo sapiens, what does “Homo” represent?
A) Family
B) Genus
C) Species
D) Class
Answer: B) Genus
Rationale: “Homo” is the genus name, while “sapiens” is the species name.
Question: Which of the following are examples of carbohydrates?
A) Fats and oils
B) Starches and sugars
,C) Proteins and amino acids
D) DNA and RNA
Answer: B) Starches and sugars
Rationale: Carbohydrates include sugars and starches, which serve as energy sources.
Question: What is the primary function of carbohydrates?
A) Hormone production
B) Structural support and energy storage
C) Genetic information storage
D) Catalyzing reactions
Answer: B) Structural support and energy storage
Rationale: Carbohydrates provide energy, store energy, and are part of cell structures.
Question: Which of the following is a monosaccharide?
A) Sucrose
B) Starch
C) Glucose
D) Lactose
Answer: C) Glucose
Rationale: Monosaccharides are simple sugars, like glucose, ribose, and glyceraldehyde.
Question: Sucrose is classified as a:
A) Monosaccharide
B) Disaccharide
C) Polysaccharide
D) Lipid
Answer: B) Disaccharide
Rationale: Sucrose is made of two sugar units and is therefore a disaccharide.
Question: Which of the following is a polysaccharide?
A) Glucose
B) Sucrose
C) Starch
D) Ribose
,Answer: C) Starch
Rationale: Polysaccharides are long chains of sugars, such as starch, cellulose, and
glycogen.
Question: Which of these is a function of lipids?
A) Catalyzing chemical reactions
B) Energy storage and membrane structure
C) Carrying genetic information
D) Providing immediate energy like glucose
Answer: B) Energy storage and membrane structure
Rationale: Lipids store energy, make up cell membranes, and are precursors to hormones.
Question: Triglycerides consist of:
A) Three glycerols and one fatty acid
B) One glycerol and three fatty acids
C) One sugar and three phosphates
D) Three amino acids
Answer: B) One glycerol and three fatty acids
Rationale: Triglycerides are the main storage form of fats.
Question: Saturated fatty acids are characterized by:
A) At least one double bond
B) Maximum hydrogen atoms and tight packing
C) Crooked structures and liquids
D) Being essential for DNA synthesis
Answer: B) Maximum hydrogen atoms and tight packing
Rationale: Saturated fats have no double bonds, allowing tight packing, which can
contribute to heart disease when combined with cholesterol.
Question: Unsaturated fatty acids differ from saturated ones because they:
A) Are solid at room temperature
B) Have double bonds and a crooked structure
C) Contain no hydrogen
D) Are not used for energy storage
, Answer: B) Have double bonds and a crooked structure
Rationale: Double bonds prevent tight packing, making unsaturated fats liquid at room
temperature.
Question: Which type of cholesterol is considered “good”?
A) LDL
B) HDL
C) Triglycerides
D) Saturated fat
Answer: B) HDL
Rationale: HDL removes excess cholesterol from the blood, whereas LDL delivers it to
tissues.
Question: Phospholipids are composed of:
A) Three fatty acids only
B) Two fatty acids, a phosphate group, and glycerol
C) One sugar, phosphate, and nitrogen base
D) Amino acids
Answer: B) Two fatty acids, a phosphate group, and glycerol
Rationale: Phospholipids form cell membranes with hydrophilic heads and hydrophobic
tails.
Question: Proteins contain which elements?
A) Only C, H, O
B) C, H, O, N, sometimes P, S, Mg, Fe
C) C, H, O, P only
D) H, O, N only
Answer: B) C, H, O, N, sometimes P, S, Mg, Fe
Rationale: Proteins are primarily made of amino acids, which contain these elements.
Question: Which is NOT a function of proteins?
A) Structural support
B) Transport
C) Defense
D) Storing genetic information
SIMPLIFIED RATIONALES AND MULTIPLE CHOICES |
GRADED A+ | 100 % GUARANTEED | 2025 -2026 |
BRANDNEW !!!!
Question: Which of the following is a characteristic of prokaryotes?
A) Multiple membrane-bound organelles
B) Nucleus containing genetic material
C) Single-celled organisms with no nucleus
D) Presence of mitochondria
Answer: C) Single-celled organisms with no nucleus
Rationale: Prokaryotes, including bacteria and archaea, lack a nucleus and membrane-
bound organelles.
Question: Eukaryotes are distinguished from prokaryotes by:
A) Being unicellular
B) Having no organelles
C) Possessing an inner and outer membrane and organelles
D) Containing only DNA
Answer: C) Possessing an inner and outer membrane and organelles
Rationale: Eukaryotic cells have organelles like the nucleus and mitochondria and are
often multicellular.
Question: In Homo sapiens, what does “Homo” represent?
A) Family
B) Genus
C) Species
D) Class
Answer: B) Genus
Rationale: “Homo” is the genus name, while “sapiens” is the species name.
Question: Which of the following are examples of carbohydrates?
A) Fats and oils
B) Starches and sugars
,C) Proteins and amino acids
D) DNA and RNA
Answer: B) Starches and sugars
Rationale: Carbohydrates include sugars and starches, which serve as energy sources.
Question: What is the primary function of carbohydrates?
A) Hormone production
B) Structural support and energy storage
C) Genetic information storage
D) Catalyzing reactions
Answer: B) Structural support and energy storage
Rationale: Carbohydrates provide energy, store energy, and are part of cell structures.
Question: Which of the following is a monosaccharide?
A) Sucrose
B) Starch
C) Glucose
D) Lactose
Answer: C) Glucose
Rationale: Monosaccharides are simple sugars, like glucose, ribose, and glyceraldehyde.
Question: Sucrose is classified as a:
A) Monosaccharide
B) Disaccharide
C) Polysaccharide
D) Lipid
Answer: B) Disaccharide
Rationale: Sucrose is made of two sugar units and is therefore a disaccharide.
Question: Which of the following is a polysaccharide?
A) Glucose
B) Sucrose
C) Starch
D) Ribose
,Answer: C) Starch
Rationale: Polysaccharides are long chains of sugars, such as starch, cellulose, and
glycogen.
Question: Which of these is a function of lipids?
A) Catalyzing chemical reactions
B) Energy storage and membrane structure
C) Carrying genetic information
D) Providing immediate energy like glucose
Answer: B) Energy storage and membrane structure
Rationale: Lipids store energy, make up cell membranes, and are precursors to hormones.
Question: Triglycerides consist of:
A) Three glycerols and one fatty acid
B) One glycerol and three fatty acids
C) One sugar and three phosphates
D) Three amino acids
Answer: B) One glycerol and three fatty acids
Rationale: Triglycerides are the main storage form of fats.
Question: Saturated fatty acids are characterized by:
A) At least one double bond
B) Maximum hydrogen atoms and tight packing
C) Crooked structures and liquids
D) Being essential for DNA synthesis
Answer: B) Maximum hydrogen atoms and tight packing
Rationale: Saturated fats have no double bonds, allowing tight packing, which can
contribute to heart disease when combined with cholesterol.
Question: Unsaturated fatty acids differ from saturated ones because they:
A) Are solid at room temperature
B) Have double bonds and a crooked structure
C) Contain no hydrogen
D) Are not used for energy storage
, Answer: B) Have double bonds and a crooked structure
Rationale: Double bonds prevent tight packing, making unsaturated fats liquid at room
temperature.
Question: Which type of cholesterol is considered “good”?
A) LDL
B) HDL
C) Triglycerides
D) Saturated fat
Answer: B) HDL
Rationale: HDL removes excess cholesterol from the blood, whereas LDL delivers it to
tissues.
Question: Phospholipids are composed of:
A) Three fatty acids only
B) Two fatty acids, a phosphate group, and glycerol
C) One sugar, phosphate, and nitrogen base
D) Amino acids
Answer: B) Two fatty acids, a phosphate group, and glycerol
Rationale: Phospholipids form cell membranes with hydrophilic heads and hydrophobic
tails.
Question: Proteins contain which elements?
A) Only C, H, O
B) C, H, O, N, sometimes P, S, Mg, Fe
C) C, H, O, P only
D) H, O, N only
Answer: B) C, H, O, N, sometimes P, S, Mg, Fe
Rationale: Proteins are primarily made of amino acids, which contain these elements.
Question: Which is NOT a function of proteins?
A) Structural support
B) Transport
C) Defense
D) Storing genetic information
