ATI TEAS 6 SCIENCE & HUMAN BIOLOGY TEST BANK UPDATE EXAM

ATI TEAS 6 SCIENCE AND HUMAN BIOLOGY
STUDY GUIDE
2026-2027 UPDATE EXAM COMPREHENSIVE TEST BANK



Welcome to the ATI TEAS 6 Science and Human Biology Comprehensive Test Bank (2026-2027 Update
Exam). This educational resource is specifically compiled and formatted to prepare students for the rigorous
TEAS 6 Science section. Every question, choice, and rationale is strictly grounded in the official study material,
providing comprehensive coverage of cell biology, human anatomy, organ systems, and physiological
processes.

Instructions: Review each question carefully. The questions are structured in a professional, student-friendly
format, complete with options, correct answers, and thorough, in-depth explanations. These rationales explain
not only why the correct choice is accurate but also clarify key physiological concepts to promote long-term
retention and mastery of the course material.




COMPREHENSIVE TEST BANK QUESTIONS (1 - 50)


CHAPTER 1: CELL BIOLOGY AND CELL STRUCTURE


Question 1: Which of the following describes the cell as the basic organizational unit of all living
things and identifies the primary macromolecule making up all cell membranes?
A. A cell is a group of tissues made of a proteins-only membrane.
B. A cell is the basic organizational unit of all living things, and all cells have membranes made of
phospholipids.
C. A cell is a complete individual organism with a membrane made of carbohydrates.
D. A cell is an organelle within a system surrounded by a membrane of nucleic acids.
ANSWER ■: B
Explanation: According to the study guide, the cell is the basic organizational unit of all living things. One thing that
all cells have in common is that they possess membranes made of phospholipids (a phospholipid bilayer).




ATI TEAS 6 Study Companion Series Page 1 2026-2027 Update Exam

,ATI TEAS 6 SCIENCE & HUMAN BIOLOGY TEST BANK 2026-2027 UPDATE EXAM




Question 2: Which of the following outlines the correct structural hierarchy of a complete
individual organism from simplest to most complex?
A. Cells → Organs → Tissues → Systems → Organism
B. Tissues → Cells → Organs → Systems → Organism
C. Cells → Tissues → Organs → Systems → Organism
D. Systems → Organs → Tissues → Cells → Organism
ANSWER ■: C
Explanation: The source material outlines the structural organization as: cells are grouped together to form tissues;
tissues are grouped together to form organs; organs are grouped together to form systems; and organs grouped
together form an organism (a complete individual). This corresponds to C.


Question 3: Which organelle contains chromosomes and serves as the regulatory center for the
cell's deoxyribonucleic acid (DNA)?
A. Golgi apparatus
B. Ribosome
C. Mitochondrion
D. Nucleus
ANSWER ■: D
Explanation: According to the study guide, the nucleus contains chromosomes and regulates the DNA of the cell.
The other organelles have different functions: ribosomes synthesize proteins, the Golgi apparatus synthesizes
materials for transport, and mitochondria generate ATP.


Question 4: What is the defining structure of eukaryotic cells, and what is its role across
generations?
A. A membrane-bound lysosome that digests extracellular proteins
B. The cell wall that prevents water loss in dry environments
C. A nucleus, which contains genetic material and passes genetic traits between generations
D. A flagellum that enables cell motility and fluid transport
ANSWER ■: C
Explanation: The source states that having a nucleus is the defining structure of eukaryotic cells. It passes genetic
traits between generations and contains the nuclear envelope, nucleoplasm, nucleolus, nuclear pores, chromatin, and
ribosomes.




Grounded in Official Course Material & Exam Blueprints Page 2 Version 4.2 | 50 Comprehensive Questions

, ATI TEAS 6 SCIENCE & HUMAN BIOLOGY TEST BANK 2026-2027 UPDATE EXAM




Question 5: What are chromosomes made of, and what constitutes the material chromatin?
A. Chromosomes are thread-like rods of DNA, and chromatin consists of DNA and protein which make up
chromosomes.
B. Chromosomes are made of lipids, and chromatin is made of pure amino acids.
C. Chromosomes are composed of microtubules, and chromatin is composed of RNA and carbohydrates.
D. Chromosomes are made of simple sugars, and chromatin consists of phospholipids and ribosomes.
ANSWER ■: A
Explanation: According to the study guide, chromosomes are thread-like rods of DNA (deoxyribonucleic acid) which
store genetic information. Chromatin is composed of DNA and protein, and it makes up chromosomes.


Question 6: Which of the following statements accurately describes the nucleolus?
A. It is a double-membrane-bound organelle that stores glycogen.
B. It is a small, round structure that lacks a membrane, consists of proteins, and functions in protein
synthesis, as well as synthesizing and storing RNA.
C. It is a lipid-rich structure that acts as a barrier to keep materials out of the cell.
D. It is a part of the cytoskeleton made of tubulin that shapes and supports the cell.
ANSWER ■: B
Explanation: According to the study guide, the nucleolus is small and round, consists of proteins, and does not have
a membrane. It is involved in protein synthesis and functions to synthesize and store RNA.


Question 7: Which biological macromolecule composes the nuclear envelope, and what is its
primary function?
A. Proteins; it synthesizes RNA from chromatin.
B. Lipids; it encloses the structures within the nucleus.
C. Carbohydrates; it provides mechanical support for cell division.
D. Nucleic acids; it exchanges materials with the mitochondria.
ANSWER ■: B
Explanation: The source material states that the nuclear envelope encloses structures within the nucleus and is
made of lipids.




Grounded in Official Course Material & Exam Blueprints Page 3 Version 4.2 | 50 Comprehensive Questions