TEAS Science Practice Test

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The Science section of the TEAS tests your foundational knowledge of chemistry, human anatomy, physiology, and general biology. To help you prepare for this section of the TEAS, this page contains everything you need to know, including what topics are covered, how many questions there are, and how you can study effectively.

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What’s on the TEAS Science Section?

section outline for the TEAS Science section, which contains 50 questions and has a time limit of 60 minutes

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Top 5 Most Challenging TEAS Science Questions

Over the last year, we’ve compiled the data from nearly 30,000 test-takers who tried their hand at the practice test at the top of this page. According to the data, around 65% of people answered these five questions incorrectly.

Answer each question and read through the answer explanation, whether you got the answer right or wrong. This will help you ensure you’ve got the topic mastered.

Whether you struggled with these questions or aced them on your first try, be sure to take the full practice test to get a better idea of how prepared you really are!

1. Which of the following anatomical structures is directly involved in the production of hormones? (Select all that apply.)


The pituitary and the pancreas are both structures of the endocrine system that produce hormones involved in body regulation, growth and development, sexual functioning, and other processes. The penis is a structure of the reproductive system that responds to hormones, but it does not produce them. The prostate plays a role in converting testosterone (produced in the testicles) into dihydrotestosterone, but does not actively produce hormones. The pons is located in the brain stem and relays nerve signals that coordinate messages between the brain and the body. The pericardium is a structural component of the cardiovascular system.

2. Which of the following are formed when the plasma membrane surrounds a particle outside of the cell?


Endocytosis is a process by which cells absorb larger molecules or even tiny organisms, such as bacteria, that would not be able to pass through the plasma membrane. Endocytic vesicles containing molecules from the extracellular environment often undergo further processing once they enter the cell.

3. Which of these does NOT match the nitrogenous base to the nucleobase?


There are two types of nitrogenous bases: purine and pyrimidine bases. Purine bases have two rings in their structure and consist of adenine and guanine. Pyrimidine bases only have one ring in their structure and consist of thymine and cytosine (DNA) and uracil and cytosine (RNA). Therefore, the correct answer is B since thymine is a pyrimidine.

4. What type of reaction is this?

Cu(s) + 2 AgNO 3 (aq) → 2 Ag(s) + Cu(NO 3 ) 2 (aq) ?


This is a single replacement reaction in which copper replaces silver. The copper combines with the nitrate ions, and the silver precipitates out. Single replacement reactions have the general form of: A + BC → AC + B Double replacement reactions have the general form of: AB + CD → AD + CB Synthesis reactions have the general form of: A + B → AB Decomposition reactions have the general form of: AB → A + B

5. In general, where in the periodic table of elements are the elements with the largest atomic radii located?


In general, atomic radius increases moving down a group due to the increasing number of electron shells. In general, atomic radius decreases moving from left to right across a period due to the increasing number of protons in the energy level. Therefore, atoms of elements in the bottom-left corner of the periodic table tend to have the largest atomic radii.

TEAS Online Course

If you want to be fully prepared, Mometrix offers an online TEAS prep course designed to give you everything you need to succeed!

Here’s what you’ll find in the TEAS course:

Everyone learns differently, so we’ve tailored the TEAS online prep course to ensure every learner has what they need to prepare for the TEAS 7 exam.

Click below to check it out!

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FAQs

Q

Who takes the TEAS?

A

The Test of Essential Academic Skills (TEAS) is available for students interested in nursing programs. Many institutions in the US require the TEAS as a prerequisite for their nursing program, so students are encouraged to learn more about the institution’s eligibility requirements.

Q

How many questions are on the TEAS Science exam?

A

The TEAS Science exam has 50 questions. This section contains six “pretest” questions that are not calculated with your final score.

Q

How long is the TEAS Science exam?

A

Test-takers have 60 minutes to complete all 50 questions on the Science section of the TEAS.

Q

Can you use a calculator for the TEAS?

A

Yes. At the beginning of the exam, a proctor will provide test-takers with a four-function calculator. Students are not allowed to use calculators with special functions.

Q

What is a passing TEAS Science score?

A

Finding out the nursing program’s score requirements is important. With the TEAS, there is no pass-fail score. You will receive a total or “main” score which includes the individual scores from all four sections (Science, Reading, Mathematics, and English & Language Arts). You will also receive the separate scores for each section. Typically, a program requires you to earn a score of at least 60% to 70%. But, it is highly competitive to gain admission into a nursing program, so students are encouraged to aim for higher than the program’s requirements.

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TEAS® is a registered trademark of the Assessment Technologies Institute®, which is unaffiliated, not a sponsor, or associated with Mometrix Test Preparation.

 

by Mometrix Test Preparation | Last Updated: July 3, 2025