WGU Introduction to Biology (KBC1, C190) - Introduction-to-Biology Exam Questions [2026]

QUESTION NO: 1
Cells use ATP to power muscle contraction. During contraction, ATP is converted to ADP and inorganic phosphate. What is happening to energy in this conversion?

A. Energy is being created. B. Energy is being stored. C. Energy is being released. D. Energy is being destroyed.

Correct Answer: C

QUESTION NO: 2
Ocean acidification dissolves calcium-based exoskeletons of purple sea urchins. Some individuals have a trait making their exterior more acid-resistant. If acidification increases, how is this population most likely to evolve?

A. Less acid-resistant exoskeletons become more common B. Longer, more rigid spines become more common C. Acid-resistant exoskeletons become more common D. Shorter, more flexible spines become more common

Correct Answer: C

QUESTION NO: 3
What is the process in which microbes convert glucose,in the absence of oxygen, intotwo ethanolmolecules andtwo carbon dioxidemolecules?

A. Aerobic oxidation B. Carbon fixation C. Phosphorylation D. Fermentation

Correct Answer: D

QUESTION NO: 4
In a multigeneration family study,8% of malesandfar fewer femalesshow a trait (e.g., red hair). What is the most likely cause?

A. Non-somatic inheritance B. Autosomal inheritance C. Sex-linkedinheritance D. Environmental influence

Correct Answer: C

QUESTION NO: 5
Rabbit populations rise and fall over 8-10 years; wolf populations in the same area follow with a ~2-year lag.
What is the relationship between wolves and rabbits?

A. Symbiosis B. Competition C. Mutualism D. Predator-prey

Correct Answer: D

QUESTION NO: 6
The Boreal forest includes trees (pine, spruce) and animals (lynx, elk) harvested for energy, food, or trade.
Which activity would negatively impact biodiversity there?

A. Increasing use of renewable (instead of nonrenewable) energy B. Decreasing human population C. Decreasing logging throughout the Boreal forest D. Increasing human population

Correct Answer: D

QUESTION NO: 7
(Use the exhibit.) Students claimed: Label 1 = metaphase, 2 = interphase, 3 = anaphase, 4 = prophase. Based on the figure, which label is correctly tagged?

A. 1 B. 3 C. 2 D. 4

Correct Answer: B

QUESTION NO: 8
What is a primary characteristic ofperipheral membrane proteins?

A. They span the entire lipid bilayer, sometimes multiple times. B. Detergents or nonpolar solvents are necessary to remove them from the membrane. C. Weak intermolecular forces keep them attached to the lipid membrane. D. They cannot be post-translationally modified.

Correct Answer: C