Penn Foster Proctored Exam Intro to
Biology | 100% Correct Answers |
Verified | Latest 2024 Version
Which one of the following lists shows the correct order of biological organization? - ✔✔Population,
community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an: - ✔✔Adaptation
During a scientific experiment, the control group is: - ✔✔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: - ✔✔Octet rule
When 2 oxygen atoms join together, a __ is formed. - ✔✔Molecule
The __ bond is a type of atomic bonds in which atoms share electrons to produce a completed outer
shell. - ✔✔Covalent
The polarity of water molecules causes them to be attracted to one another by a __ bond. -
✔✔Hydrogen
As the number of hydrogen ions in a solution increases, the pH of the solution: - ✔✔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? - ✔✔Lower density as ice
The most abundant element by weight in the human body is - ✔✔Oxygen
, The polysaccharide structural carbohydrate most commonly used by living things is: - ✔✔Cellulose
Which one of the following functional groups is associated with fatty acids? - ✔✔Carboxyl
The hard body parts of insects and crabs are composed of a polysaccharide called: - ✔✔Chitin
Cell membranes are composed mainly of which type of lipids? - ✔✔Phospholipids
___ proteins are made of polypeptide chains folded into rounded compact shapes. - ✔✔Globular
When joined by a dehydration reaction, the covalent bond between the carboxyl groups of two amino
acids is called a ____ bond. - ✔✔Peptide
The sugar in RNA is: - ✔✔Ribose
Within cells, the synthesis of proteins occurs in the: - ✔✔Ribosomes
What is the main function of the mitochondria? - ✔✔Producing ATP
The ___ keep(s) the cytoplasm of eukaryotic cells separate from the DNA. - ✔✔Nuclear envelope
Organelles that use solar energy to make carbohydrates are called: - ✔✔Chloroplasts
The ___ are sometimes called the "powerhouses" of the cell. - ✔✔Mitochondria
The cell-to-cell junctions that allow cells to communicate are called ___ junctions. - ✔✔Gap
In a/an ___ reaction, one reaction releases energy and the second uses energy. - ✔✔Coupled
Biology | 100% Correct Answers |
Verified | Latest 2024 Version
Which one of the following lists shows the correct order of biological organization? - ✔✔Population,
community, ecosystem, biosphere
A modification that makes organisms more suited to their environment is called a/an: - ✔✔Adaptation
During a scientific experiment, the control group is: - ✔✔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: - ✔✔Octet rule
When 2 oxygen atoms join together, a __ is formed. - ✔✔Molecule
The __ bond is a type of atomic bonds in which atoms share electrons to produce a completed outer
shell. - ✔✔Covalent
The polarity of water molecules causes them to be attracted to one another by a __ bond. -
✔✔Hydrogen
As the number of hydrogen ions in a solution increases, the pH of the solution: - ✔✔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? - ✔✔Lower density as ice
The most abundant element by weight in the human body is - ✔✔Oxygen
, The polysaccharide structural carbohydrate most commonly used by living things is: - ✔✔Cellulose
Which one of the following functional groups is associated with fatty acids? - ✔✔Carboxyl
The hard body parts of insects and crabs are composed of a polysaccharide called: - ✔✔Chitin
Cell membranes are composed mainly of which type of lipids? - ✔✔Phospholipids
___ proteins are made of polypeptide chains folded into rounded compact shapes. - ✔✔Globular
When joined by a dehydration reaction, the covalent bond between the carboxyl groups of two amino
acids is called a ____ bond. - ✔✔Peptide
The sugar in RNA is: - ✔✔Ribose
Within cells, the synthesis of proteins occurs in the: - ✔✔Ribosomes
What is the main function of the mitochondria? - ✔✔Producing ATP
The ___ keep(s) the cytoplasm of eukaryotic cells separate from the DNA. - ✔✔Nuclear envelope
Organelles that use solar energy to make carbohydrates are called: - ✔✔Chloroplasts
The ___ are sometimes called the "powerhouses" of the cell. - ✔✔Mitochondria
The cell-to-cell junctions that allow cells to communicate are called ___ junctions. - ✔✔Gap
In a/an ___ reaction, one reaction releases energy and the second uses energy. - ✔✔Coupled
