PENN FOSTER INTRODUCTION TO BIOLOGY
FINAL PAPER 2026 COMPLETE SOLVED
QUESTIONS PRACTICE REVISION PACK EXPERT
REVIEW 300 ITEMS
◉ What's the correct order of biological organization?
Answer: Population, community, ecosystem, biosphere
◉ Modification that makes organisms more suited to their
environment is called a/an
Answer: Adaptation
◉ Domain whose members live in very harsh environments--like
salt lakes and hot springs
Answer: Archaea
◉ Control groups, during an experiment, are
Answer: Identical to experimental group in all area except the
variable being tested
◉ The _____ is a subatomic particle that carries a positive electrical
charge
,Answer: Proton
◉ When an atom has two or more electron shells, the outter shell
will be more stable if it contains 8 electrons. This concept is called:
Answer: Octet Rule
◉ When two oxygen atoms join together, a _______ is formed
Answer: Molecule
◉ The _____ bond is a type of atomic bond in which atoms share
electrons to produce a complete outter shell
Answer: Covalent
◉ The polarity of water molecules causes them to be attracted to
one another by a _____ bond
Answer: Hydrogen
◉ As the number of hydrogen ions in a solution increases, the pH of
the solution
Answer: Decreases
,◉ During winter only the upper surface of a lake freezes, which
allows for life to persist below the surface. Which of water's unique
properties is responsible for this phenomenon?
Answer: Lower density as ice
◉ The most abundant element by weight in the human body is
Answer: Oxygen
◉ The polysaccharide structural carbohydrate most commonly used
by living things is
Answer: Cellulose
◉ Which one of the following functional groups is associated with
fatty acids?
Answer: Carboxyl
◉ The hard body parts of insects and crabs are composed of a
polysaccharide called
Answer: Chitin
◉ Cell membranes are composed of mainly which type of lipids?
Answer: Phospholipids
, ◉ _____ proteins are made of polypeptide chains folded into rounded
compact shapes
Answer: Globular
◉ When joined by a dehydration reaction, the covalent bond
between the carboxyl groups of two
amino acids is called a _______ bond.
Answer: Peptide
◉ The sugar in RNA is:
Answer: Ribose
◉ Within cells, the synthesis of proteins occurs in the
Answer: Ribosomes
◉ What's the main function of the mitochondria?
Answer: Producing ATP
◉ The _____ keep(s) the cytoplasm of Eukaryotic cells separate from
the DNA
Answer: Nuclear Envelope
FINAL PAPER 2026 COMPLETE SOLVED
QUESTIONS PRACTICE REVISION PACK EXPERT
REVIEW 300 ITEMS
◉ What's the correct order of biological organization?
Answer: Population, community, ecosystem, biosphere
◉ Modification that makes organisms more suited to their
environment is called a/an
Answer: Adaptation
◉ Domain whose members live in very harsh environments--like
salt lakes and hot springs
Answer: Archaea
◉ Control groups, during an experiment, are
Answer: Identical to experimental group in all area except the
variable being tested
◉ The _____ is a subatomic particle that carries a positive electrical
charge
,Answer: Proton
◉ When an atom has two or more electron shells, the outter shell
will be more stable if it contains 8 electrons. This concept is called:
Answer: Octet Rule
◉ When two oxygen atoms join together, a _______ is formed
Answer: Molecule
◉ The _____ bond is a type of atomic bond in which atoms share
electrons to produce a complete outter shell
Answer: Covalent
◉ The polarity of water molecules causes them to be attracted to
one another by a _____ bond
Answer: Hydrogen
◉ As the number of hydrogen ions in a solution increases, the pH of
the solution
Answer: Decreases
,◉ During winter only the upper surface of a lake freezes, which
allows for life to persist below the surface. Which of water's unique
properties is responsible for this phenomenon?
Answer: Lower density as ice
◉ The most abundant element by weight in the human body is
Answer: Oxygen
◉ The polysaccharide structural carbohydrate most commonly used
by living things is
Answer: Cellulose
◉ Which one of the following functional groups is associated with
fatty acids?
Answer: Carboxyl
◉ The hard body parts of insects and crabs are composed of a
polysaccharide called
Answer: Chitin
◉ Cell membranes are composed of mainly which type of lipids?
Answer: Phospholipids
, ◉ _____ proteins are made of polypeptide chains folded into rounded
compact shapes
Answer: Globular
◉ When joined by a dehydration reaction, the covalent bond
between the carboxyl groups of two
amino acids is called a _______ bond.
Answer: Peptide
◉ The sugar in RNA is:
Answer: Ribose
◉ Within cells, the synthesis of proteins occurs in the
Answer: Ribosomes
◉ What's the main function of the mitochondria?
Answer: Producing ATP
◉ The _____ keep(s) the cytoplasm of Eukaryotic cells separate from
the DNA
Answer: Nuclear Envelope
