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ASU BIO 181 Exam 1
Practice Question Bank
Comprehensive Review with 78 Questions, Answers & Rationales
BIO 181 — General Biology I
Edition 1 · August 2026
,Table of Contents
1. Instructions for Use 2
2. Practice Questions with Answers & Rationales 2
BIO 181 · Arizona State University Page 1
, ASU BIO 181 EXAM 1 PRACTICE GUIDE CELL BIOLOGY & GENETICS
How to Use This Guide
Read each stem, choose your answer, then check the rationale below. The correct option is marked, and each wrong option
is explained. This guide contains 78 questions covering the full scope of the ASU BIO 181 Exam 1.
Category: ASU BIO 181 — Exam 1
1 Actin filaments are present in:
A The cell's cortex
B The cell's interior
C The nucleus
D The mitochondria
Why A is correct: Actin filaments are found in the cell cortex, just beneath the plasma membrane, providing structural
support and enabling cell movement.
B — Microtubules are found in the cell's interior.
C — Actin filaments are not in the nucleus.
D — Mitochondria have their own internal structures.
2 Microtubules are present in:
A The cell's cortex
B The cell's interior
C The nucleus
D The plasma membrane
Why B is correct: Microtubules are found in the cell's interior, forming the cytoskeleton and facilitating intracellular
transport.
A — Actin filaments are in the cell's cortex.
C — Microtubules are not in the nucleus.
D — The plasma membrane is not the location.
ASU BIO 181 Exam 1
Practice Question Bank
Comprehensive Review with 78 Questions, Answers & Rationales
BIO 181 — General Biology I
Edition 1 · August 2026
,Table of Contents
1. Instructions for Use 2
2. Practice Questions with Answers & Rationales 2
BIO 181 · Arizona State University Page 1
, ASU BIO 181 EXAM 1 PRACTICE GUIDE CELL BIOLOGY & GENETICS
How to Use This Guide
Read each stem, choose your answer, then check the rationale below. The correct option is marked, and each wrong option
is explained. This guide contains 78 questions covering the full scope of the ASU BIO 181 Exam 1.
Category: ASU BIO 181 — Exam 1
1 Actin filaments are present in:
A The cell's cortex
B The cell's interior
C The nucleus
D The mitochondria
Why A is correct: Actin filaments are found in the cell cortex, just beneath the plasma membrane, providing structural
support and enabling cell movement.
B — Microtubules are found in the cell's interior.
C — Actin filaments are not in the nucleus.
D — Mitochondria have their own internal structures.
2 Microtubules are present in:
A The cell's cortex
B The cell's interior
C The nucleus
D The plasma membrane
Why B is correct: Microtubules are found in the cell's interior, forming the cytoskeleton and facilitating intracellular
transport.
A — Actin filaments are in the cell's cortex.
C — Microtubules are not in the nucleus.
D — The plasma membrane is not the location.
