WGU C190 INTRO TO BIO – EXAM (ACTUAL 2025/2026)
PRACTICE QUESTIONS WITH VERIFIED CORRECT ANSWERS
What kind of molecule passes freely through the cell
membrane? - ----Answers---small molecules
polar molecules
nonpolar molecules
The cell membrane is composed of a lipid bilayer. Is the
interior of the bilayer polar or nonpolar? - ----Answers---
nonpolar
The chemical transmitter dopamine is released from a vesicle
within a neuron when the vesicle fuses with the cell
membrane and dumps the chemical into the extracellular
space. Which type of transport mechanism is most
representative of this process? - ----Answers---Exocytosis
Where does the electron end up at the end of the light
dependent reaction? - ----Answers---NADPH
What is the energy lost as the electron is being passed from
one molecule to another in the light dependent reaction used
for? - ----Answers---ATP is formed.
Energy used to power the light independent reaction is stored
in which molecule(s)? - ----Answers---ATP and NADPH
,At the end of the Calvin cycle, energy is stored in which
molecule(s)? - ----Answers---C6H12O6
Which reaction supplies the majority of ATP for aerobic
organisms? - ----Answers---Cellular respiration
Which organelle in eukaryotic cells is used for cellular
respiration? - ----Answers---Mitochondria
Which statement is true for the production of ATP? - ----
Answers---Cells build ATP by attaching a phosphate to ADP
Cells use the energy stored in the ATP to do work. What
happens to the ATP that is used to power cellular reactions? -
----Answers---It is broken down to ADP and a phosphate.
Which statement is true for the production of NADH? - ----
Answers---Cells build NADH by attaching electrons and an H
to NAD+.
What happens to the NADH produced in glycolysis? - ----
Answers---It is used to produce ATP in the electron transport
chain.
Would glycolysis be able to continue if the electron transport
chain did not use up the NADH? - ----Answers---No,
, glycolysis needs the NAD+ produced by the electron transport
chain.
Fermentation occurs in the _____ of the cell. - ----Answers---
cytoplasm
What are the reactants that are required for photosynthesis? -
----Answers---carbon dioxide, water, and an energy source
(such as radiant energy)
What are the reactants that are required for cellular
respiration? - ----Answers---organic molecules (such as
sugars) and oxygen
Oxygen is a requirement for organisms that go through
cellular respiration. The role of oxygen is to pull __________ - --
--Answers---electrons
How, specifically, does oxygen enable aerobic cellular
respiration? - ----Answers---Oxygen accepts high-energy
electrons from the electron transport chain in the
mitochondria, where most ATP is produced.
In which phase of the cell cycle does DNA replication take
place? - ----Answers---S
Interphase is the part of the cell cycle when the cell ____ - ----
Answers---grows and duplicates its DNA
PRACTICE QUESTIONS WITH VERIFIED CORRECT ANSWERS
What kind of molecule passes freely through the cell
membrane? - ----Answers---small molecules
polar molecules
nonpolar molecules
The cell membrane is composed of a lipid bilayer. Is the
interior of the bilayer polar or nonpolar? - ----Answers---
nonpolar
The chemical transmitter dopamine is released from a vesicle
within a neuron when the vesicle fuses with the cell
membrane and dumps the chemical into the extracellular
space. Which type of transport mechanism is most
representative of this process? - ----Answers---Exocytosis
Where does the electron end up at the end of the light
dependent reaction? - ----Answers---NADPH
What is the energy lost as the electron is being passed from
one molecule to another in the light dependent reaction used
for? - ----Answers---ATP is formed.
Energy used to power the light independent reaction is stored
in which molecule(s)? - ----Answers---ATP and NADPH
,At the end of the Calvin cycle, energy is stored in which
molecule(s)? - ----Answers---C6H12O6
Which reaction supplies the majority of ATP for aerobic
organisms? - ----Answers---Cellular respiration
Which organelle in eukaryotic cells is used for cellular
respiration? - ----Answers---Mitochondria
Which statement is true for the production of ATP? - ----
Answers---Cells build ATP by attaching a phosphate to ADP
Cells use the energy stored in the ATP to do work. What
happens to the ATP that is used to power cellular reactions? -
----Answers---It is broken down to ADP and a phosphate.
Which statement is true for the production of NADH? - ----
Answers---Cells build NADH by attaching electrons and an H
to NAD+.
What happens to the NADH produced in glycolysis? - ----
Answers---It is used to produce ATP in the electron transport
chain.
Would glycolysis be able to continue if the electron transport
chain did not use up the NADH? - ----Answers---No,
, glycolysis needs the NAD+ produced by the electron transport
chain.
Fermentation occurs in the _____ of the cell. - ----Answers---
cytoplasm
What are the reactants that are required for photosynthesis? -
----Answers---carbon dioxide, water, and an energy source
(such as radiant energy)
What are the reactants that are required for cellular
respiration? - ----Answers---organic molecules (such as
sugars) and oxygen
Oxygen is a requirement for organisms that go through
cellular respiration. The role of oxygen is to pull __________ - --
--Answers---electrons
How, specifically, does oxygen enable aerobic cellular
respiration? - ----Answers---Oxygen accepts high-energy
electrons from the electron transport chain in the
mitochondria, where most ATP is produced.
In which phase of the cell cycle does DNA replication take
place? - ----Answers---S
Interphase is the part of the cell cycle when the cell ____ - ----
Answers---grows and duplicates its DNA
