PENN FOSTER INTRO TO BIOLOGY EXAM
STUDY GUIDE: 200+ QUESTIONS AND 100%
VERIFIED ANSWERS /GRADED A+ /
GUARANTEED PASS!!
_____ are the smallest units of life
- answer-Cells
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
Organelles that use solar energy to make carbohydrates are called
- answer-Chloroplasts
The _____ are sometimes called the "powerhouse" of the cell
- answer-Mitochondria
The cell-to-cell junctions that allow cells to communicate are called _______
junctions
- answer-Gap
In a/an _____ reaction, one reaction releases energy and the second uses energy
- answer-Coupled
Which is not a feature of enzymes?
- answer-Destroyed by metabolic reactions
Entropy refers to
- answer-Relative amount of disorganization in a system
Phagocytosis refers to
- answer-Endocytosis
_____ is movement of H2O across semipermeable membranes from high
concentration to low concentration
- answer-Osmosis
In the electron pathway for light reactions in photosynthesis, PSII involves
- answer-Split water
STUDY GUIDE: 200+ QUESTIONS AND 100%
VERIFIED ANSWERS /GRADED A+ /
GUARANTEED PASS!!
_____ are the smallest units of life
- answer-Cells
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
Organelles that use solar energy to make carbohydrates are called
- answer-Chloroplasts
The _____ are sometimes called the "powerhouse" of the cell
- answer-Mitochondria
The cell-to-cell junctions that allow cells to communicate are called _______
junctions
- answer-Gap
In a/an _____ reaction, one reaction releases energy and the second uses energy
- answer-Coupled
Which is not a feature of enzymes?
- answer-Destroyed by metabolic reactions
Entropy refers to
- answer-Relative amount of disorganization in a system
Phagocytosis refers to
- answer-Endocytosis
_____ is movement of H2O across semipermeable membranes from high
concentration to low concentration
- answer-Osmosis
In the electron pathway for light reactions in photosynthesis, PSII involves
- answer-Split water
