WGU C190 Introduction to Biology Final
Exam 2026/2027 – Verified Q&As with
Detailed Rationales (Test Bank Bundle - 48
Questions)
---
*QUESTION 1:*
What is the basic unit of life?
A) The cell
B) The atom
C) The molecule
D) The tissue
> 🎯 *CORRECT ANSWER:* A) The cell
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The cell is the smallest structure that performs all life functions.
> * *Why Distractors Fail:* Atoms and molecules are smaller, non-living; tissues are groups of cells.
> * *Core Takeaway:* Cells are the fundamental unit of life.
---
*QUESTION 2:*
Which organelle is responsible for generating ATP through cellular respiration?
A) Mitochondria
B) Ribosomes
,C) Nucleus
D) Golgi apparatus
> 🎯 *CORRECT ANSWER:* A) Mitochondria
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mitochondria are the powerhouses of the cell.
> * *Why Distractors Fail:* Ribosomes make proteins; the nucleus contains DNA; the Golgi modifies
proteins.
> * *Core Takeaway:* Mitochondria produce ATP.
---
*QUESTION 3:*
Prokaryotic cells differ from eukaryotic cells in that they:
A) Lack a nucleus
B) Have a nucleus
C) Have membrane-bound organelles
D) Are multicellular
> 🎯 *CORRECT ANSWER:* A) Lack a nucleus
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Prokaryotes do not have a nucleus or membrane-bound organelles.
> * *Why Distractors Fail:* Eukaryotes have a nucleus and organelles; prokaryotes are typically
unicellular.
> * *Core Takeaway:* Prokaryotes lack a nucleus.
---
*QUESTION 4:*
DNA is composed of which of the following?
, A) Nucleotides
B) Amino acids
C) Monosaccharides
D) Fatty acids
> 🎯 *CORRECT ANSWER:* A) Nucleotides
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* DNA is a nucleic acid made of nucleotides.
> * *Why Distractors Fail:* Amino acids make proteins; monosaccharides make carbohydrates; fatty
acids make lipids.
> * *Core Takeaway:* DNA is made of nucleotides.
---
*QUESTION 5:*
The process by which cells divide to produce two identical daughter cells is called:
A) Mitosis
B) Meiosis
C) Binary fission
D) Fertilization
> 🎯 *CORRECT ANSWER:* A) Mitosis
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mitosis produces two genetically identical daughter cells.
> * *Why Distractors Fail:* Meiosis produces gametes; binary fission is in prokaryotes; fertilization is
fusion of gametes.
> * *Core Takeaway:* Mitosis creates identical cells.
---
Exam 2026/2027 – Verified Q&As with
Detailed Rationales (Test Bank Bundle - 48
Questions)
---
*QUESTION 1:*
What is the basic unit of life?
A) The cell
B) The atom
C) The molecule
D) The tissue
> 🎯 *CORRECT ANSWER:* A) The cell
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The cell is the smallest structure that performs all life functions.
> * *Why Distractors Fail:* Atoms and molecules are smaller, non-living; tissues are groups of cells.
> * *Core Takeaway:* Cells are the fundamental unit of life.
---
*QUESTION 2:*
Which organelle is responsible for generating ATP through cellular respiration?
A) Mitochondria
B) Ribosomes
,C) Nucleus
D) Golgi apparatus
> 🎯 *CORRECT ANSWER:* A) Mitochondria
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mitochondria are the powerhouses of the cell.
> * *Why Distractors Fail:* Ribosomes make proteins; the nucleus contains DNA; the Golgi modifies
proteins.
> * *Core Takeaway:* Mitochondria produce ATP.
---
*QUESTION 3:*
Prokaryotic cells differ from eukaryotic cells in that they:
A) Lack a nucleus
B) Have a nucleus
C) Have membrane-bound organelles
D) Are multicellular
> 🎯 *CORRECT ANSWER:* A) Lack a nucleus
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Prokaryotes do not have a nucleus or membrane-bound organelles.
> * *Why Distractors Fail:* Eukaryotes have a nucleus and organelles; prokaryotes are typically
unicellular.
> * *Core Takeaway:* Prokaryotes lack a nucleus.
---
*QUESTION 4:*
DNA is composed of which of the following?
, A) Nucleotides
B) Amino acids
C) Monosaccharides
D) Fatty acids
> 🎯 *CORRECT ANSWER:* A) Nucleotides
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* DNA is a nucleic acid made of nucleotides.
> * *Why Distractors Fail:* Amino acids make proteins; monosaccharides make carbohydrates; fatty
acids make lipids.
> * *Core Takeaway:* DNA is made of nucleotides.
---
*QUESTION 5:*
The process by which cells divide to produce two identical daughter cells is called:
A) Mitosis
B) Meiosis
C) Binary fission
D) Fertilization
> 🎯 *CORRECT ANSWER:* A) Mitosis
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mitosis produces two genetically identical daughter cells.
> * *Why Distractors Fail:* Meiosis produces gametes; binary fission is in prokaryotes; fertilization is
fusion of gametes.
> * *Core Takeaway:* Mitosis creates identical cells.
---
