- What Is TX PACT 738, Exactly?
- Who Administers and Owns This Exam
- Exam Format, Timing, and Fees
- The Five Domains You Must Master
- Who Actually Takes the TX PACT 738
- Eligibility: When Is PACT Required?
- Registration, Scheduling, and Retake Rules
- How to Prepare Without Wasting Time
- PACT Admission vs. Teaching Certification
- Frequently Asked Questions
- TX PACT 738 is a 125-question, selected-response admission test administered by Pearson for the TEA.
- Genetics and Evolution is the heaviest domain at approximately 27% of the exam.
- You need a scaled score of 240 to pass, and testing runs year-round by appointment.
- PACT is only required if your GPA is below 2.5 or you have fewer than 15 relevant subject-area credits.
What Is TX PACT 738, Exactly?
TX PACT 738 is the official designation for the Life Science: Grades 7-12 test within the Texas Program for Admission to Content Teacher (PACT) system. It is not a teaching certificate. It is a content-knowledge exam that aspiring educator preparation program (EPP) candidates take to demonstrate they know enough biology, ecology, and genetics to be admitted into a teacher preparation pathway targeting secondary Life Science instruction in Texas.
Because "TX PACT" and the number "738" appear across several unrelated credentials in search results, it's worth being precise here: this article is exclusively about the Life Science: Grades 7-12 (738) test, its structure, its five domains, and how it fits into Texas educator preparation. If you want the deepest possible dive into what each competency area actually tests, the TX PACT 738 Exam Domains 2026: Complete Guide to All 5 Content Areas breaks the framework down competency-by-competency.
Who Administers and Owns This Exam
The Texas Education Agency (TEA) owns the PACT program and sets the policy framework, while Pearson develops, administers, and scores the exam through Pearson VUE testing centers. This split matters for candidates: TEA controls eligibility rules and how PACT interacts with certification pathways, while Pearson controls the logistics - registration accounts, testing appointments, score reporting, and the base exam fee of $106.
If you're trying to understand what this credential actually is in plain language before diving into logistics, our companion piece What Is TX PACT 738? covers the same ground from a slightly different angle, and TX PACT 738 Meaning unpacks the acronym itself for readers who are new to Texas educator testing terminology.
Exam Format, Timing, and Fees
TX PACT 738 is a computer-administered test made up of 125 selected-response questions. Some of those items may be unscored field-test questions that Pearson uses to evaluate future exam content - you won't know which ones, so every question deserves genuine effort. You get a total testing time of 3 hours, with a full appointment window of 3 hours 15 minutes once you account for the 15-minute tutorial and compliance agreement at the start.
An on-screen scientific calculator is provided during the test, which matters for the quantitative genetics problems (Punnett square ratios, allele frequency math, chi-square style reasoning) that show up in the Genetics and Evolution domain.
- Base exam fee: $106
- Passing scaled score: 240
- Question count: 125 selected-response items (plus possible unscored field-test items)
- Testing availability: year-round by appointment, in Texas and nationwide
For a full breakdown of every fee scenario and what "base fee" does and doesn't include, see TX PACT 738 Certification Cost 2026: Complete Pricing Breakdown. If your question is simply "what number do I need to hit," the TX PACT 738 Passing Score 2026: Exactly What You Need to Pass guide walks through the 240 threshold in more depth.
Key Takeaway
Budget the full 3-hour-15-minute appointment mentally, not just the 3-hour testing clock - the tutorial and agreement eat into your day even though they don't eat into your answer time.
The Five Domains You Must Master
The official TX PACT 738 framework organizes content into five domains and 15 competencies. Domain weights are approximate, but they tell you exactly where to invest study hours. This is the single most TX PACT 738-specific fact in this article: Genetics and Evolution is the largest domain at roughly 27%, meaning more than one in four questions on your exam likely comes from that content area.
Domain 1: Nature of Science (20%)
Covers scientific inquiry, experimental design, safety procedures, and how scientific knowledge is constructed and revised.
- Designing and evaluating controlled experiments
- Lab safety protocols and equipment use
- Interpreting data, graphs, and scientific models
Domain 2: Biochemistry and Cell Biology (13%)
Focuses on the molecular and cellular machinery that underlies all living systems.
- Macromolecules, enzymes, and metabolic pathways
- Cell structure, organelle function, and membrane transport
- Cellular respiration and photosynthesis
Domain 3: Genetics and Evolution (27%)
The largest domain by weight, covering heredity mechanisms and the evidence and theory behind evolutionary change.
- Mendelian and non-Mendelian inheritance patterns
- DNA replication, transcription, and translation
- Natural selection, speciation, and evidence for evolution
Domain 4: Biological Unity and Diversity (20%)
Examines classification systems and the shared and distinguishing traits across taxa.
- Taxonomy and phylogenetic relationships
- Structural and functional adaptations across kingdoms
- Comparative anatomy and physiology
Domain 5: Ecology and Environment (20%)
Covers interactions between organisms and their environments at multiple scales.
- Energy flow, food webs, and biogeochemical cycles
- Population dynamics and carrying capacity
- Human impact on ecosystems and conservation concepts
Notice that Nature of Science, Biological Unity and Diversity, and Ecology and Environment sit close together at 20% each, while Biochemistry and Cell Biology is the lightest domain at 13%. That doesn't mean you can skip it - it means your study time should scale proportionally, with Genetics and Evolution getting the largest single block of review. For a competency-level breakdown of what's tested inside each of these five domains, revisit the TX PACT 738 Exam Domains 2026: Complete Guide to All 5 Content Areas.
| Domain | Approximate Weight | Core Focus |
|---|---|---|
| Nature of Science | 20% | Inquiry, experimental design, safety |
| Biochemistry and Cell Biology | 13% | Molecular biology, cell structure |
| Genetics and Evolution | 27% | Heredity, DNA, natural selection |
| Biological Unity and Diversity | 20% | Taxonomy, comparative biology |
| Ecology and Environment | 20% | Ecosystems, populations, human impact |
Who Actually Takes the TX PACT 738
The candidate pool for TX PACT 738 is fairly specific: people entering or transferring into Texas educator preparation programs who want to teach Life Science to grades 7 through 12. This isn't a general science teaching exam and it isn't a K-6 generalist test - it's aimed squarely at future secondary biology, environmental science, and general science teachers who need to prove content mastery before an EPP admits them.
Once admitted through PACT and later certified, holders of a secondary Life Science background typically pursue roles in Texas public middle schools and high schools, biology labs, and related science departments. If you're weighing whether this pathway leads anywhere financially or professionally worthwhile, the TX PACT 738 Salary Guide 2026: Complete Earnings Analysis and TX PACT 738 Jobs pages go deeper on career outcomes, and Is the TX PACT 738 Certification Worth It? Complete ROI Analysis 2026 weighs the full cost-benefit picture.
Eligibility: When Is PACT Required?
Not every EPP candidate has to take TX PACT 738. It becomes required in specific circumstances defined by TEA:
- Your overall GPA is below 2.5, or
- You have fewer than 15 relevant subject-area semester credit hours in life science content
Meet either of those thresholds and PACT admission testing kicks in as a requirement before an EPP can admit you. Individual EPPs are also allowed to layer on additional admission requirements beyond what TEA mandates, so always confirm specifics with your chosen program. To sit for the exam at all, you generally need a bachelor's degree (or to be in your final semester of one) and a TEA ID number. A full eligibility walkthrough, including how the GPA and credit-hour thresholds interact with EPP-specific rules, lives at TX PACT 738 Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Registration, Scheduling, and Retake Rules
Once you register for TX PACT 738, you have 170 days to schedule and actually sit for the exam - plan your registration date around your realistic study timeline, not the other way around. Testing appointments are available year-round at Pearson VUE centers throughout Texas and nationwide, which gives candidates flexibility but also means there's no fixed "testing window" excuse to delay preparation.
If your first attempt doesn't clear the 240 passing score, retake rules require at least 30 days between attempts, and your prior results must post to ECOS (the Educator Certification Online System) before you're cleared to test again. Candidates affiliated with an EPP also need retest approval from that program before rebooking. For the mechanics of exactly how appointment windows, retakes, and deadlines interact, check TX PACT 738 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
How to Prepare Without Wasting Time
Given the domain weights, a sensible study allocation mirrors the exam blueprint rather than splitting effort evenly across all five domains. Spend the largest single block of time on Genetics and Evolution since it's worth roughly 27% of the exam, moderate blocks on Nature of Science, Biological Unity and Diversity, and Ecology and Environment at about 20% each, and a lighter (but not zero) block on Biochemistry and Cell Biology at 13%.
Genetics and Evolution
- Mendelian inheritance, Punnett squares, allele frequencies
- DNA replication, transcription, translation
- Practice with the on-screen calculator for genetics math
Biological Unity and Diversity + Ecology
- Taxonomy and comparative anatomy review
- Food webs, energy flow, population dynamics
Nature of Science + Biochemistry
- Experimental design and lab safety scenarios
- Cell structure, macromolecules, metabolism
Full Practice and Review
- Timed practice sessions matching the 3-hour format
- Targeted review of weakest domain from missed practice items
If you want a structured, week-by-week plan built specifically around this blueprint rather than generic exam advice, the TX PACT 738 Study Guide 2026: How to Pass on Your First Attempt expands on this exact allocation. And once you're ready for rapid final review, the TX PACT 738 Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the highest-yield facts from all five domains onto one reference page. You can also run full-length timed practice sessions on our TX PACT 738 practice test platform to get comfortable with the 125-question, selected-response format before test day.
PACT Admission vs. Teaching Certification
One of the most common points of confusion is treating TX PACT 738 as if it were a teaching license. It isn't. PACT supports program admission - it's a gate that helps EPPs decide whether to admit a candidate based on demonstrated content knowledge in Life Science. Teacher certification itself is a separate process that happens later, after admission, coursework, and the certification-specific exams required by TEA for actually holding a Texas teaching credential.
Understanding this distinction matters when you're planning your timeline: passing TX PACT 738 gets you into (or transferred within) an EPP with a Life Science: Grades 7-12 focus; it does not, by itself, put you in front of a classroom with a certificate in hand. For a broader explainer distinguishing these stages, see TX PACT 738 Certification and What Is TX PACT 738 Certification?.
How Difficult Is It, Really?
Statewide best-attempt pass rate data from the September 1, 2024 to August 31, 2025 program year showed a 33% pass rate among 101 test takers for this specific exam. That figure gives a sense of scale for how demanding the content is, though it should be read as historical context rather than a prediction - your outcome depends heavily on how closely your preparation maps to the five-domain blueprint above. For a deeper statistical breakdown and what factors into that number, see TX PACT 738 Pass Rate 2026: What the Data Shows, and for a qualitative assessment of what makes this exam challenging in the first place, read How Hard Is the TX PACT 738 Exam? Complete Difficulty Guide 2026.
Getting Started
If you're at the very beginning of researching this credential, it helps to bookmark a few reference points: what the acronym stands for, what the exam actually measures, and where it fits in the Texas educator pipeline. Our related explainers - What Does TX PACT 738 Stand For?, What Does TX PACT 738 Mean?, and TX PACT 738 Training - cover adjacent angles on the same exam so you can build a complete picture before you register. When you're ready to convert study time into confidence, practice testing on txquiz.com is the fastest way to see where your domain knowledge already holds up and where the 27%-weighted Genetics and Evolution section needs more attention.
Frequently Asked Questions
No. TX PACT 738 is a content-knowledge exam used for admission into an educator preparation program focused on Life Science: Grades 7-12. Teaching certification is a separate, later process governed by TEA.
The exam consists of 125 selected-response questions, with the possibility of additional unscored field-test items mixed in that are not identified to test takers.
You need a scaled passing score of 240. The exam is computer-administered through Pearson VUE with a 3-hour testing time.
Genetics and Evolution carries the heaviest approximate weight at 27%, making it the highest-priority domain, followed by Nature of Science, Biological Unity and Diversity, and Ecology and Environment at roughly 20% each.
No. It's required specifically for candidates with a GPA below 2.5 or fewer than 15 relevant subject-area semester credit hours in life science; individual EPPs may add further requirements.