ESTUDYR
C190 — UNIT 2: BASIC CHEMISTRY & BIOLOGICAL MACROMOLECULES
Which information would be most useful to know if you were trying to determine whether a
molecule is organic?
A. It contains phosphorus.
B. It is formed through chemical bonds.
C. It has carbon and hydrogen in it.
D. It is found in living things.
Rationale: Organic chemistry is defined by molecules that contain carbon–hydrogen bonds.
Which characteristic of organic molecules is related to the fact that they are modular?
A. They always contain carbon.
B. They can contain energy.
C. They are made of repeating subunits.
D. They are often associated with living things.
Rationale: “Modular” means built from monomers that form polymers (repeating subunits).
True or False: All organic molecules contain carbon–hydrogen (C–H) bonds; they often also
contain O, N, P, or S.
A. True ✅
B. False
Rationale: Organic molecules typically have C–H bonds and may include other common
biogenic elements.
True or False: Atoms within organic molecules are connected by covalent bonds.
A. True ✅
B. False
Rationale: Covalent bonding forms stable carbon-containing structures common in organic
molecules.
True or False: Organic molecules are modular; monomers can be linked to make polymers.
A. True ✅
B. False
Rationale: This describes polymerization (e.g., amino acids → proteins, sugars →
polysaccharides).
True or False: Organic molecules are often associated with living things, but living things can
also produce inorganic molecules and organic molecules can be created artificially.
A. True ✅
B. False
, ESTUDYR
Rationale: Organic ≠ exclusively biological; many organic compounds are synthesized
industrially.
Which polymer consists of nucleotide monomers?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
Rationale: DNA and RNA are polymers of nucleotides.
Which subunits bond to form lipid macromolecules (typical fats)?
A. Sugars
B. Fatty acids
C. Nucleotides
D. Amino acids
Rationale: Triglycerides = glycerol + three fatty acids.
Which monomers bond together to form carbohydrates?
A. Butter
B. Sugars (monosaccharides)
C. Salt
D. Water
Rationale: Monosaccharides (glucose, fructose) polymerize into disaccharides/polysaccharides.
Organic molecules made of C:H:O in roughly 1:2:1 ratio and serving as a primary energy
source are called:
A. Carbohydrate
B. Monosaccharide
C. Polysaccharide
D. Disaccharide
Rationale: Carbohydrates (general class) match that formula; monosaccharide is a single sugar.
A single sugar monomer is called a:
A. Carbohydrate
B. Monosaccharide
C. Polysaccharide
D. Disaccharide
Rationale: “Mono” = one sugar unit.
Two sugar monomers bonded together form a:
A. Carbohydrate
C190 — UNIT 2: BASIC CHEMISTRY & BIOLOGICAL MACROMOLECULES
Which information would be most useful to know if you were trying to determine whether a
molecule is organic?
A. It contains phosphorus.
B. It is formed through chemical bonds.
C. It has carbon and hydrogen in it.
D. It is found in living things.
Rationale: Organic chemistry is defined by molecules that contain carbon–hydrogen bonds.
Which characteristic of organic molecules is related to the fact that they are modular?
A. They always contain carbon.
B. They can contain energy.
C. They are made of repeating subunits.
D. They are often associated with living things.
Rationale: “Modular” means built from monomers that form polymers (repeating subunits).
True or False: All organic molecules contain carbon–hydrogen (C–H) bonds; they often also
contain O, N, P, or S.
A. True ✅
B. False
Rationale: Organic molecules typically have C–H bonds and may include other common
biogenic elements.
True or False: Atoms within organic molecules are connected by covalent bonds.
A. True ✅
B. False
Rationale: Covalent bonding forms stable carbon-containing structures common in organic
molecules.
True or False: Organic molecules are modular; monomers can be linked to make polymers.
A. True ✅
B. False
Rationale: This describes polymerization (e.g., amino acids → proteins, sugars →
polysaccharides).
True or False: Organic molecules are often associated with living things, but living things can
also produce inorganic molecules and organic molecules can be created artificially.
A. True ✅
B. False
, ESTUDYR
Rationale: Organic ≠ exclusively biological; many organic compounds are synthesized
industrially.
Which polymer consists of nucleotide monomers?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
Rationale: DNA and RNA are polymers of nucleotides.
Which subunits bond to form lipid macromolecules (typical fats)?
A. Sugars
B. Fatty acids
C. Nucleotides
D. Amino acids
Rationale: Triglycerides = glycerol + three fatty acids.
Which monomers bond together to form carbohydrates?
A. Butter
B. Sugars (monosaccharides)
C. Salt
D. Water
Rationale: Monosaccharides (glucose, fructose) polymerize into disaccharides/polysaccharides.
Organic molecules made of C:H:O in roughly 1:2:1 ratio and serving as a primary energy
source are called:
A. Carbohydrate
B. Monosaccharide
C. Polysaccharide
D. Disaccharide
Rationale: Carbohydrates (general class) match that formula; monosaccharide is a single sugar.
A single sugar monomer is called a:
A. Carbohydrate
B. Monosaccharide
C. Polysaccharide
D. Disaccharide
Rationale: “Mono” = one sugar unit.
Two sugar monomers bonded together form a:
A. Carbohydrate
