BIOLOGY PROCTORED EXAM PENN FOSTER WITH 100% RATED
CORRECT REAL EXAM QUESTIONS AND CORRECT ANSWERS|
GRADED A+ |2025 LATEST VERSION | 100% VERIFIED
Which one of the following lists shows the correct order of biological organization? -
(answer)Population, community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an: -
(answer)Adaptation
During a scientific experiment, the control group is: - (answer)Identical to the experimental
group in all areas except the variable being tested
When an atom has 2 or more electron shells, the outer shell will be most stable if it contains 8
electrons. This concept is called the: - (answer)Octet rule
When 2 oxygen atoms join together, a __ is formed. - (answer)Molecule
The __ bond is a type of atomic bonds in which atoms share electrons to produce a completed
outer 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 mainly of 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 is 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 "powerhouses" 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 of the following is not a feature of enzymes? - (answer)Metabolic reactions destroy the
enzyme molecules.
The term entropy refers to: - (answer)The relative amount of disorganization in a system
, The term phagocytosis refers to type of: - (answer)Endocytosis
___ is the movement of water across a semipermeable membrane from an area of higher
concentration to an area of lesser concentration. - (answer)Osmosis
In the electron pathway for light reactions in photosynthesis, PS 2 involves: - (answer)Splitting
water
A plant that absorbs blue-violet-green wavelengths of light, will reflect what color? -
(answer)Yellow-orange
___ is an example of a CAM plant. - (answer)Pineapple
The final step of the Calvin cycle is the regeneration of: - (answer)RuBP
Atmospheric carbon dioxide enters leaves through: - (answer)Stomata
What are the 3 steps of the Calvin cycle? - (answer)1.) CO2 fixation
2.) CO2 reduction
3.) Regeneration of RuBP
The largest energy yield during aerobic respiration occurs after which stage? - (answer)Electron
transport chain cycle
CORRECT REAL EXAM QUESTIONS AND CORRECT ANSWERS|
GRADED A+ |2025 LATEST VERSION | 100% VERIFIED
Which one of the following lists shows the correct order of biological organization? -
(answer)Population, community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an: -
(answer)Adaptation
During a scientific experiment, the control group is: - (answer)Identical to the experimental
group in all areas except the variable being tested
When an atom has 2 or more electron shells, the outer shell will be most stable if it contains 8
electrons. This concept is called the: - (answer)Octet rule
When 2 oxygen atoms join together, a __ is formed. - (answer)Molecule
The __ bond is a type of atomic bonds in which atoms share electrons to produce a completed
outer 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 mainly of 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 is 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 "powerhouses" 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 of the following is not a feature of enzymes? - (answer)Metabolic reactions destroy the
enzyme molecules.
The term entropy refers to: - (answer)The relative amount of disorganization in a system
, The term phagocytosis refers to type of: - (answer)Endocytosis
___ is the movement of water across a semipermeable membrane from an area of higher
concentration to an area of lesser concentration. - (answer)Osmosis
In the electron pathway for light reactions in photosynthesis, PS 2 involves: - (answer)Splitting
water
A plant that absorbs blue-violet-green wavelengths of light, will reflect what color? -
(answer)Yellow-orange
___ is an example of a CAM plant. - (answer)Pineapple
The final step of the Calvin cycle is the regeneration of: - (answer)RuBP
Atmospheric carbon dioxide enters leaves through: - (answer)Stomata
What are the 3 steps of the Calvin cycle? - (answer)1.) CO2 fixation
2.) CO2 reduction
3.) Regeneration of RuBP
The largest energy yield during aerobic respiration occurs after which stage? - (answer)Electron
transport chain cycle
