1|Page
WGU C190 INTRO TO BIOLOGY ACTUAL OA EXAM
2026/2027 COMPLETE TEST APPROVED QUESTIONS
AND CORRECT VERIFIED ANSWERS
When a polypeptide from food attaches to pepsin, pepsin changes
shape and the polypeptide is hydrolyzed and broken into smaller pieces.
Which best describes the situation? ......ANSWER......Pepsin is an
enzyme and binds to the green polypeptide at pepsin's active site; the
green polypeptide is the substrate
Which of the functions below is provided by ferritin proteins?
......ANSWER......Transport material long-distance, e.g. through
circulation in blood
The four charged amino acids at the opening of the pore attract
potassium (K+) ions, increasing the rate at which they pass into the
channel. Which charge do you predict must be indicated by the red
color? ......ANSWER......Negative charge (anions)
Which of the functions below are provided by proteins in the ATP
synthase "machine"? ......ANSWER......Act as an enzyme (catalyze a
reaction); Enable movement, convert chemical energy to contraction
or rotation; Transport material across a membrane
pg. 1
,2|Page
What kind of molecule stores the coded information that allows Lisa's
cells to make insulin? ......ANSWER......DNA
DNA is ____________, while RNA is ______________.
......ANSWER......double stranded; single stranded
DNA contains _______________, while RNA contains ______________.
......ANSWER......deoxyribose sugar; ribose sugar
Both DNA and RNA contain similar bases. Which bases do both types of
nucleic acids contain in their nucleotides. Choose all that apply.
......ANSWER......Adenine, Cytosine, Guanine
DNA and RNA are very important macromolecules that perform
essential functions for every cell. Remember, there were many different
diverse functions of proteins; however, DNA and RNA have very specific
jobs.
This molecule functions in storing the genetic information for the
organism which is passed on to the next generation.
......ANSWER......DNA
This molecule translates the genetic code into proteins by telling the
cell the sequence of amino acids to produce the peptide (protein).
......ANSWER......RNA
pg. 2
,3|Page
This molecule contains the "recipe" or instructions for the making of
proteins. ......ANSWER......DNA
Look at the five in the red circles in the picture above. They are
representing the carbon atoms on what part of the nucleotide?
......ANSWER......Pentose sugar
DNA maintains and copies information at a very high level of fidelity,
generation after generation. What keeps the two sides of the double
helix together in DNA? ......ANSWER......Hydrogen bonds between
complementary bases
Encodes human insulin, and they pass this molecule on to their own
offspring so that the entire population of yeast in the vat is capable of
making human insulin? ......ANSWER......DNA
As you explore how living things interact with the nonliving
environment, you are focused on __________.
......ANSWER......ecosystem
Individuals can be grouped into population and _____________.
......ANSWER......communities
In multicellular life forms, cells take on specific functions in tissues,
organs, and ______ _______. ......ANSWER......organ systems
pg. 3
, 4|Page
Cells are composed of atoms that are organized into __________.
......ANSWER......molecules
The _____________ is the first level of organization that is alive;
therefore, it is considered the fundamental unit of life.
......ANSWER......cell
An oak tree is an _________________. ......ANSWER......organism
Ren is going to select an oak tree to plant in one corner of the lot.
Which level of biological organization is being examined?
......ANSWER......organisms
Study _____________ focuses on the interaction of living and nonliving
things. ......ANSWER......ecosystem
Maria is going to research the soil compaction affected by high
pedestrian traffic to see it it will affect the ability of the grass to grow.
Which level of biological organization is being examined?
......ANSWER......ecosystems
William is going to identify & count the different kinds of plant and
animal species currently living in the space. Which level of biological
organization is being examined? ......ANSWER......communities
pg. 4
WGU C190 INTRO TO BIOLOGY ACTUAL OA EXAM
2026/2027 COMPLETE TEST APPROVED QUESTIONS
AND CORRECT VERIFIED ANSWERS
When a polypeptide from food attaches to pepsin, pepsin changes
shape and the polypeptide is hydrolyzed and broken into smaller pieces.
Which best describes the situation? ......ANSWER......Pepsin is an
enzyme and binds to the green polypeptide at pepsin's active site; the
green polypeptide is the substrate
Which of the functions below is provided by ferritin proteins?
......ANSWER......Transport material long-distance, e.g. through
circulation in blood
The four charged amino acids at the opening of the pore attract
potassium (K+) ions, increasing the rate at which they pass into the
channel. Which charge do you predict must be indicated by the red
color? ......ANSWER......Negative charge (anions)
Which of the functions below are provided by proteins in the ATP
synthase "machine"? ......ANSWER......Act as an enzyme (catalyze a
reaction); Enable movement, convert chemical energy to contraction
or rotation; Transport material across a membrane
pg. 1
,2|Page
What kind of molecule stores the coded information that allows Lisa's
cells to make insulin? ......ANSWER......DNA
DNA is ____________, while RNA is ______________.
......ANSWER......double stranded; single stranded
DNA contains _______________, while RNA contains ______________.
......ANSWER......deoxyribose sugar; ribose sugar
Both DNA and RNA contain similar bases. Which bases do both types of
nucleic acids contain in their nucleotides. Choose all that apply.
......ANSWER......Adenine, Cytosine, Guanine
DNA and RNA are very important macromolecules that perform
essential functions for every cell. Remember, there were many different
diverse functions of proteins; however, DNA and RNA have very specific
jobs.
This molecule functions in storing the genetic information for the
organism which is passed on to the next generation.
......ANSWER......DNA
This molecule translates the genetic code into proteins by telling the
cell the sequence of amino acids to produce the peptide (protein).
......ANSWER......RNA
pg. 2
,3|Page
This molecule contains the "recipe" or instructions for the making of
proteins. ......ANSWER......DNA
Look at the five in the red circles in the picture above. They are
representing the carbon atoms on what part of the nucleotide?
......ANSWER......Pentose sugar
DNA maintains and copies information at a very high level of fidelity,
generation after generation. What keeps the two sides of the double
helix together in DNA? ......ANSWER......Hydrogen bonds between
complementary bases
Encodes human insulin, and they pass this molecule on to their own
offspring so that the entire population of yeast in the vat is capable of
making human insulin? ......ANSWER......DNA
As you explore how living things interact with the nonliving
environment, you are focused on __________.
......ANSWER......ecosystem
Individuals can be grouped into population and _____________.
......ANSWER......communities
In multicellular life forms, cells take on specific functions in tissues,
organs, and ______ _______. ......ANSWER......organ systems
pg. 3
, 4|Page
Cells are composed of atoms that are organized into __________.
......ANSWER......molecules
The _____________ is the first level of organization that is alive;
therefore, it is considered the fundamental unit of life.
......ANSWER......cell
An oak tree is an _________________. ......ANSWER......organism
Ren is going to select an oak tree to plant in one corner of the lot.
Which level of biological organization is being examined?
......ANSWER......organisms
Study _____________ focuses on the interaction of living and nonliving
things. ......ANSWER......ecosystem
Maria is going to research the soil compaction affected by high
pedestrian traffic to see it it will affect the ability of the grass to grow.
Which level of biological organization is being examined?
......ANSWER......ecosystems
William is going to identify & count the different kinds of plant and
animal species currently living in the space. Which level of biological
organization is being examined? ......ANSWER......communities
pg. 4
