Biology Proctored Exam Penn Foster
Review Questions and Answers Solved
2025
Characteristics of living things --- correct precise answer ----All are
composed of cells
-All obtain energy and use it to develop
-Can sense changes in the environment and adjust in response to
change
-Exhibit modifications that represent adaptations to their
environment
Levels of Biological Organization --- correct precise answer ---atom,
molecule, organelle, cell, tissue, organ, organ system, organism
How are organisms classified? --- correct precise answer ---on the
basis of their evolutionary/genetic relatedness
What is the scientific method? What is it's importance in biological
sciences? --- correct precise answer ---Process used to validate
observations while minimizing observer bias
,It's goal is for research to be conduced in a fair, unbiased and
repeatable manner. The best way to discover how and why the world
works
What is matter? --- correct precise answer ---Anything that has mass
and takes up space
What is an atom? --- correct precise answer ---smallest unit of matter
that retains all the chemical properties of an element. They combine
to form molecules which then form into a solid, gas or liquid
What is the structure of an atom? --- correct precise answer ---
Nucleus in the center that contains protons (positively charged) and
neutrons (no charge). The outermost region is called an electron shell
that contain the electrons (negatively charged)
What is an ionic bond? --- correct precise answer ---A chemical bond
that's formed when an atom transfers and electron to another Atom
What is a covalent bond? --- correct precise answer ---Results when 2
atoms share electrons in order to have a completed outer shell
,What is a double covalent bond? --- correct precise answer ---Occurs
when 2 atoms share 2 pairs of electroms
In order to be an organic molecule it must contain what? --- correct
precise answer ---Carbon and hydrogen
What are the main groups of organic molecules that build cells and
their parts? --- correct precise answer ---Carbohydrates, proteins,
lipids, nucleic acid
What are the properties of water? --- correct precise answer ---Its
attraction to polar molecules.
High-specific heat.
High heat of vaporization.
The lower density of ice.
High polarity.
Carbohydrates --- correct precise answer ---Broken down to glucose
to provide energy.
, What are the different kinds of carbs? --- correct precise answer ---
Glucose= monosaccharide that serves as blood sugar
Sucrose= disaccharide which is table sugar
Polysaccharides= include starch, which stores energy in plants
Glycogen= stores energy in animals
Cellulose= makes up the structure of plant cell walls
Protein --- correct precise answer ---macromolecule that contains
carbon, hydrogen, oxygen, and nitrogen; needed by the body for
growth and repair
Lipid --- correct precise answer ---Energy-rich organic compounds,
such as fats, oils, and waxes, that are made of carbon, hydrogen, and
oxygen.
Serve as a long term energy source
Nucleic acid --- correct precise answer ---macromolecule containing
hydrogen, oxygen, nitrogen, carbon, and phosphorus
Form DNA which acts to store genetic information
What is the cell theory? --- correct precise answer ---All living
organisms are made up of cells
Review Questions and Answers Solved
2025
Characteristics of living things --- correct precise answer ----All are
composed of cells
-All obtain energy and use it to develop
-Can sense changes in the environment and adjust in response to
change
-Exhibit modifications that represent adaptations to their
environment
Levels of Biological Organization --- correct precise answer ---atom,
molecule, organelle, cell, tissue, organ, organ system, organism
How are organisms classified? --- correct precise answer ---on the
basis of their evolutionary/genetic relatedness
What is the scientific method? What is it's importance in biological
sciences? --- correct precise answer ---Process used to validate
observations while minimizing observer bias
,It's goal is for research to be conduced in a fair, unbiased and
repeatable manner. The best way to discover how and why the world
works
What is matter? --- correct precise answer ---Anything that has mass
and takes up space
What is an atom? --- correct precise answer ---smallest unit of matter
that retains all the chemical properties of an element. They combine
to form molecules which then form into a solid, gas or liquid
What is the structure of an atom? --- correct precise answer ---
Nucleus in the center that contains protons (positively charged) and
neutrons (no charge). The outermost region is called an electron shell
that contain the electrons (negatively charged)
What is an ionic bond? --- correct precise answer ---A chemical bond
that's formed when an atom transfers and electron to another Atom
What is a covalent bond? --- correct precise answer ---Results when 2
atoms share electrons in order to have a completed outer shell
,What is a double covalent bond? --- correct precise answer ---Occurs
when 2 atoms share 2 pairs of electroms
In order to be an organic molecule it must contain what? --- correct
precise answer ---Carbon and hydrogen
What are the main groups of organic molecules that build cells and
their parts? --- correct precise answer ---Carbohydrates, proteins,
lipids, nucleic acid
What are the properties of water? --- correct precise answer ---Its
attraction to polar molecules.
High-specific heat.
High heat of vaporization.
The lower density of ice.
High polarity.
Carbohydrates --- correct precise answer ---Broken down to glucose
to provide energy.
, What are the different kinds of carbs? --- correct precise answer ---
Glucose= monosaccharide that serves as blood sugar
Sucrose= disaccharide which is table sugar
Polysaccharides= include starch, which stores energy in plants
Glycogen= stores energy in animals
Cellulose= makes up the structure of plant cell walls
Protein --- correct precise answer ---macromolecule that contains
carbon, hydrogen, oxygen, and nitrogen; needed by the body for
growth and repair
Lipid --- correct precise answer ---Energy-rich organic compounds,
such as fats, oils, and waxes, that are made of carbon, hydrogen, and
oxygen.
Serve as a long term energy source
Nucleic acid --- correct precise answer ---macromolecule containing
hydrogen, oxygen, nitrogen, carbon, and phosphorus
Form DNA which acts to store genetic information
What is the cell theory? --- correct precise answer ---All living
organisms are made up of cells
