WGU C190 Intro to Biology Latest Update 2026 | Exam
Prep | 100% Accurate Answers
1. What does biology primarily study?
The history of scientific discoveries in biology.
The structure of ecosystems without considering organisms.
The chemical composition of non-living matter.
Life and how living organisms interact with each other and their
environments.
2. A nutrient is a substance that an organism uses for
All answers are correct.
maintenance.
growth.
repair of tissues.
metabolism.
3. The periodic table is organized based on which of the following?
Molar mass
Atomic weight
Atomic number
Metal-nonmetal elements
Reactivity
4. What defines an ion in terms of electrical charge?
, A molecule made of two or more atoms
An atom that is neutral
An atom with a positive or negative charge
A charged particle that cannot exist independently
5. Describe how covalent bonds contribute to the stability of molecules.
Covalent bonds are irrelevant to molecular stability.
Covalent bonds weaken molecules by creating unstable interactions.
Covalent bonds contribute to molecular stability by allowing atoms
to share electrons, creating strong connections.
Covalent bonds only occur in ionic compounds.
6. What is the function of the cell membrane?
Maintain wholeness of the cell
Control the entry and exit of various substances
Provide a barrier to water-soluble substances
All of the above
7. If an organism is unable to obtain a specific nutrient from its environment,
what potential consequences might it face?
The organism may experience growth deficiencies and impaired
cellular functions.
The organism will thrive and adapt to new nutrients.
The organism will produce more nutrients internally.
The organism will become more efficient at photosynthesis.
,8. If a laboratory experiment requires maintaining protein function, what
measures should be taken to prevent denaturation?
Control temperature and pH levels.
Increase the concentration of salts.
Expose proteins to high temperatures for short periods.
Use acidic solutions to enhance protein stability.
9. What is the primary function of mechanical proteins in organisms?
Store genetic information
Transport molecules across membranes
Provide flexibility, elasticity, and support for movement
Catalyze biochemical reactions
10. An ion is:
The particle in an atom's nucleus that gives it mass
One of the particles that orbits the atom's nucleus
An atom that has lost or gained electrons and has a positive or
negative charge
An atom that reacts only with carbon or hydrogen
11. What is the definition of monosaccharides?
Simple sugars with one sugar subunit
Lipids that store energy
Proteins composed of amino acids
Complex carbohydrates made of multiple sugar units
, 12. If a mutation changes the 'R group' of a specific amino acid in a protein, what
potential impact could this have on the protein's function?
It could alter the protein's function by changing its shape or
interaction with other molecules.
It would have no effect on the protein's function.
It would make the protein more stable.
It would only affect the protein's solubility.
13. Describe how phospholipids contribute to the integrity of cell membranes.
Phospholipids store nutrients for the cell.
Phospholipids assist in the synthesis of proteins.
Phospholipids are involved in energy production within the cell.
Phospholipids form a bilayer that acts as a protective barrier,
maintaining the cell's internal environment.
14. What is the definition of reproduction in biological terms?
Reproduction refers to the ability of organisms to respond to
environmental stimuli.
Reproduction is the mechanism by which organisms obtain energy.
Reproduction is the process by which organisms grow and develop.
Reproduction occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
15. Biotic factors of an ecosystem are those factors that are __________, while
abiotic factors are those that are ___ _.
not present; present
Prep | 100% Accurate Answers
1. What does biology primarily study?
The history of scientific discoveries in biology.
The structure of ecosystems without considering organisms.
The chemical composition of non-living matter.
Life and how living organisms interact with each other and their
environments.
2. A nutrient is a substance that an organism uses for
All answers are correct.
maintenance.
growth.
repair of tissues.
metabolism.
3. The periodic table is organized based on which of the following?
Molar mass
Atomic weight
Atomic number
Metal-nonmetal elements
Reactivity
4. What defines an ion in terms of electrical charge?
, A molecule made of two or more atoms
An atom that is neutral
An atom with a positive or negative charge
A charged particle that cannot exist independently
5. Describe how covalent bonds contribute to the stability of molecules.
Covalent bonds are irrelevant to molecular stability.
Covalent bonds weaken molecules by creating unstable interactions.
Covalent bonds contribute to molecular stability by allowing atoms
to share electrons, creating strong connections.
Covalent bonds only occur in ionic compounds.
6. What is the function of the cell membrane?
Maintain wholeness of the cell
Control the entry and exit of various substances
Provide a barrier to water-soluble substances
All of the above
7. If an organism is unable to obtain a specific nutrient from its environment,
what potential consequences might it face?
The organism may experience growth deficiencies and impaired
cellular functions.
The organism will thrive and adapt to new nutrients.
The organism will produce more nutrients internally.
The organism will become more efficient at photosynthesis.
,8. If a laboratory experiment requires maintaining protein function, what
measures should be taken to prevent denaturation?
Control temperature and pH levels.
Increase the concentration of salts.
Expose proteins to high temperatures for short periods.
Use acidic solutions to enhance protein stability.
9. What is the primary function of mechanical proteins in organisms?
Store genetic information
Transport molecules across membranes
Provide flexibility, elasticity, and support for movement
Catalyze biochemical reactions
10. An ion is:
The particle in an atom's nucleus that gives it mass
One of the particles that orbits the atom's nucleus
An atom that has lost or gained electrons and has a positive or
negative charge
An atom that reacts only with carbon or hydrogen
11. What is the definition of monosaccharides?
Simple sugars with one sugar subunit
Lipids that store energy
Proteins composed of amino acids
Complex carbohydrates made of multiple sugar units
, 12. If a mutation changes the 'R group' of a specific amino acid in a protein, what
potential impact could this have on the protein's function?
It could alter the protein's function by changing its shape or
interaction with other molecules.
It would have no effect on the protein's function.
It would make the protein more stable.
It would only affect the protein's solubility.
13. Describe how phospholipids contribute to the integrity of cell membranes.
Phospholipids store nutrients for the cell.
Phospholipids assist in the synthesis of proteins.
Phospholipids are involved in energy production within the cell.
Phospholipids form a bilayer that acts as a protective barrier,
maintaining the cell's internal environment.
14. What is the definition of reproduction in biological terms?
Reproduction refers to the ability of organisms to respond to
environmental stimuli.
Reproduction is the mechanism by which organisms obtain energy.
Reproduction is the process by which organisms grow and develop.
Reproduction occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
15. Biotic factors of an ecosystem are those factors that are __________, while
abiotic factors are those that are ___ _.
not present; present
