UNCW BIO 201 2 PRACTICE
EXAMINATION 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ What are the three domains of life?.
Answer: Bacteria, archea, and eukaryotes
◍ What is the main difference between bacteria and archea.
Answer: both are prokaryotes, but bacteria's cell walls contain peptidoglycan
and archea have membranes composed of phospholipids.
◍ What is the strongest bond?.
Answer: Covalent bonds
◍ Cell theory.
Answer: The scientific theory that states that all living organisms are
composed of cells, and that cells are the basic unit of life.
◍ What is the weakest bond?.
Answer: Hydrogen bonds, but collectively hydrogen bonds are extremely
strong
◍ Ribosomes.
Answer: Molecular machines within cells that synthesize proteins by
translating messenger RNA.
◍ What four properties does hydrogen bonding give water?.
Answer: 1. Cohesion and adhesion2. Solid is less dense than liquid3. High
specific heat3. Universal solvent of life
◍ Cohesion.
Answer: The hydrogen bonds between linking water molecules gives them
the ability to stick to themselves.
, ◍ Adhesion.
Answer: The ability for molecules to stick to surfaces.
◍ Cytosol.
Answer: The aqueous component of the cytoplasm where various
organelles, proteins, and other cell structures are suspended.
◍ How do hydrogen bonds allow ice to float?.
Answer: Hydrogen bonds in ice are "more ordered" than in the liquid form
of water, making ice less dense than the liquid.
◍ Is water polar or non-polar?.
Answer: Polar
◍ Plasma membrane.
Answer: The biological membrane that separates and protects the interior of
all cells from the external environment.
◍ Hydrocarbons.
Answer: Organic molecules consisting of only carbon and hydrogen.
◍ What are the 7 functional groups?.
Answer: 1. Carboxyl Group2. Carbonyl Group3. Hydroxyl Group4. Amino
Group5. Sulfhydryl Group6. Phosphate Group7. Methyl Group
◍ Prokaryote.
Answer: A unicellular organism that lacks a nucleus and membrane-bound
organelles, such as bacteria.
◍ Eukaryote.
Answer: An organism whose cells contain a nucleus and membrane-bound
organelles, including plants, animals, and fungi.
◍ Monomers build polymers through....
Answer: dehydration reactions
◍ Organelle.
Answer: Specialized structures within a cell that perform specific functions,
EXAMINATION 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ What are the three domains of life?.
Answer: Bacteria, archea, and eukaryotes
◍ What is the main difference between bacteria and archea.
Answer: both are prokaryotes, but bacteria's cell walls contain peptidoglycan
and archea have membranes composed of phospholipids.
◍ What is the strongest bond?.
Answer: Covalent bonds
◍ Cell theory.
Answer: The scientific theory that states that all living organisms are
composed of cells, and that cells are the basic unit of life.
◍ What is the weakest bond?.
Answer: Hydrogen bonds, but collectively hydrogen bonds are extremely
strong
◍ Ribosomes.
Answer: Molecular machines within cells that synthesize proteins by
translating messenger RNA.
◍ What four properties does hydrogen bonding give water?.
Answer: 1. Cohesion and adhesion2. Solid is less dense than liquid3. High
specific heat3. Universal solvent of life
◍ Cohesion.
Answer: The hydrogen bonds between linking water molecules gives them
the ability to stick to themselves.
, ◍ Adhesion.
Answer: The ability for molecules to stick to surfaces.
◍ Cytosol.
Answer: The aqueous component of the cytoplasm where various
organelles, proteins, and other cell structures are suspended.
◍ How do hydrogen bonds allow ice to float?.
Answer: Hydrogen bonds in ice are "more ordered" than in the liquid form
of water, making ice less dense than the liquid.
◍ Is water polar or non-polar?.
Answer: Polar
◍ Plasma membrane.
Answer: The biological membrane that separates and protects the interior of
all cells from the external environment.
◍ Hydrocarbons.
Answer: Organic molecules consisting of only carbon and hydrogen.
◍ What are the 7 functional groups?.
Answer: 1. Carboxyl Group2. Carbonyl Group3. Hydroxyl Group4. Amino
Group5. Sulfhydryl Group6. Phosphate Group7. Methyl Group
◍ Prokaryote.
Answer: A unicellular organism that lacks a nucleus and membrane-bound
organelles, such as bacteria.
◍ Eukaryote.
Answer: An organism whose cells contain a nucleus and membrane-bound
organelles, including plants, animals, and fungi.
◍ Monomers build polymers through....
Answer: dehydration reactions
◍ Organelle.
Answer: Specialized structures within a cell that perform specific functions,
