College Placement exam prep

CLEP Biology practice test

2026-2027 exam practice page

6 practice questions

Answers and rationales included. Switch between Exam and Study modes.

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CLEP Biology

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Question 1 Understand cell structure and organelles

Question 1: Understand cell structure and organelles

Which organelle is the primary site of ATP production through aerobic cellular respiration in eukaryotic cells?

Question 2 Distinguish prokaryotic and eukaryotic cells

Question 2: Distinguish prokaryotic and eukaryotic cells

Which feature is found in eukaryotic cells but absent in prokaryotic cells?

Question 3 Understand the phases of mitosis

Question 3: Understand the phases of mitosis

During which phase of mitosis do sister chromatids separate and move toward opposite poles of the cell?

Question 4 Apply Mendelian genetics

Question 4: Apply Mendelian genetics

In pea plants, tall (T) is dominant to short (t). If two heterozygous tall plants are crossed, what fraction of the offspring is expected to be short?

Question 5 Understand DNA structure and base pairing

Question 5: Understand DNA structure and base pairing

In a double-stranded DNA molecule, adenine always pairs with which nitrogenous base?

Question 6 Understand the process of protein synthesis

Question 6: Understand the process of protein synthesis

The process by which the genetic information in messenger RNA is used to assemble a chain of amino acids at the ribosome is called:

Question 7 Understand mechanisms of evolution

Question 7: Understand mechanisms of evolution

Which of the following is the primary source of new genetic variation in a population?

Question 8 Understand natural selection

Question 8: Understand natural selection

A population of insects is sprayed with pesticide, and over several generations the population becomes resistant. This change is best explained by:

Question 9 Understand energy flow in ecosystems

Question 9: Understand energy flow in ecosystems

Approximately what percentage of energy is typically transferred from one trophic level to the next in a food chain?

Question 10 Understand photosynthesis

Question 10: Understand photosynthesis

In photosynthesis, the light-dependent reactions occur in the thylakoid membranes and directly produce which two energy-carrying molecules used by the Calvin cycle?

Question 11 Understand enzyme function

Question 11: Understand enzyme function

Which statement best describes how enzymes speed up biochemical reactions?

Question 12 Understand cellular transport

Question 12: Understand cellular transport

The movement of water across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration is called:

Question 13 Understand meiosis and genetic variation

Question 13: Understand meiosis and genetic variation

Crossing over, a process that increases genetic diversity, occurs during which phase of meiosis?

Question 14 Understand levels of biological organization

Question 14: Understand levels of biological organization

Which sequence correctly lists levels of ecological organization from smallest to largest?

Question 15 Understand the carbon cycle

Question 15: Understand the carbon cycle

Which process removes carbon dioxide from the atmosphere and incorporates it into organic compounds?

Question 16 Understand human body systems

Question 16: Understand human body systems

In the human circulatory system, which blood vessels carry oxygen-poor blood from the body back toward the heart?

Question 17 Understand classification and taxonomy

Question 17: Understand classification and taxonomy

In the modern system of biological classification, which taxonomic rank is the most inclusive and broadest?

Question 18 Understand population genetics

Question 18: Understand population genetics

A population in Hardy-Weinberg equilibrium is characterized by all of the following EXCEPT:

Question 19 Understand fermentation

Question 19: Understand fermentation

When oxygen is unavailable, human muscle cells produce ATP through fermentation, which generates which byproduct?

Question 20 Understand ecological relationships

Question 20: Understand ecological relationships

A relationship in which one organism benefits while the other is neither helped nor harmed is called:

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About this practice test

What this 2026-2027 CLEP Biology Practice Test covers

Purchase access to the current 6-question practice bank, with exam mode, study mode, answers and rationales. The free sample is separate. Purchase includes the current bank only.

Practice material can include variations on the same concept. It is not an official exam or a guarantee of a passing score. Confirm important facts against current authoritative sources.

Work through up to 50 College Board-style questions built around reading analysis, algebra setup, and the wording patterns students usually miss on the first read.
Use answer-by-answer rationales to learn why the correct option wins and why weaker distractors fail in College Placement exam situations.
Review 3 real-world analogies, topic article cards, and source checks after each question so data interpretation and sentence revision feel easier to recognize under pressure.
Build timing, confidence, and recall with scenario-based practice that feels closer to the real CLEP Biology than a generic flashcard dump.

Prepare for the CLEP Biology with realistic College Board practice questions, timed review, detailed rationales, and real-world analogies that make harder College Placement concepts easier to remember.

This practice test is designed for students and professionals preparing for CLEP Biology who want stronger exam-day confidence, better explanation quality, and more useful answer review than a generic test bank.

Focus areas include reading analysis, algebra setup, data interpretation, sentence revision, along with scenario-based judgment, careful review of why distractors are less correct, and real-world analogies that help the key ideas stick.

What you will practice on this page

  • Work through up to 50 College Board-style questions built around reading analysis, algebra setup, and the wording patterns students usually miss on the first read.
  • Use answer-by-answer rationales to learn why the correct option wins and why weaker distractors fail in College Placement exam situations.
  • Review 3 real-world analogies, topic article cards, and source checks after each question so data interpretation and sentence revision feel easier to recognize under pressure.
  • Build timing, confidence, and recall with scenario-based practice that feels closer to the real CLEP Biology than a generic flashcard quiz.

How to use this exam to study smarter

  1. Start with the 20-question free sample to spot whether reading analysis or algebra setup is slowing you down before you buy the full exam.
  2. After each block, review every rationale and the 3 real-world analogies, topic article cards, and source checks so the tested pattern behind data interpretation becomes easier to remember.
  3. Retake the full CLEP Biology practice test in timed mode and focus on cleaner decision-making, not just memorizing the last answer.

Students often land on this page after searching for terms like CLEP Biology practice test, CLEP Biology practice questions, CLEP Biology free practice test, CLEP Biology study guide, College Board CLEP Biology practice test, CLEP Biology reading analysis questions. That is why the free sample gives you 10 questions first and the full version goes deeper into the tested patterns.

Frequently asked questions

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Purchase access to the current 6-question practice bank, with exam mode, study mode, answers and rationales. The free sample is separate. Purchase includes the current bank only.

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After successful payment, sign in with your checkout account and open the exam from your account. You can use exam mode and study mode with answer rationales.

Is this an official exam or a passing-score guarantee?

No. This is independent practice material. Use current official exam objectives and authoritative references alongside it.

Question-linked study articles

Study articles that support CLEP Biology prep

These guides come from this exam's question topics. Use them after a missed question to review the concept, answer reasoning, distractors, and sources.

PracticeTestVault review illustration for Ethics on CLEP Biology Review: Ethics

Question topic: Ethics

CLEP Biology Review: Ethics

July 16, 2026 2 min read

Review ethics for this CLEP Biology question with the key prompt clue, correct-answer reasoning, distractor checks, and sources to verify next.

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PracticeTestVault review illustration for Reading analysis on CLEP Biology Review: Reading analysis

Question topic: Reading analysis

CLEP Biology Review: Reading analysis

July 16, 2026 2 min read

Review reading analysis for this CLEP Biology question with the key prompt clue, correct-answer reasoning, distractor checks, and sources to verify next.

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PracticeTestVault review illustration for Study strategy on CLEP Biology Review: Study strategy

Question topic: Study strategy

CLEP Biology Review: Study strategy

July 16, 2026 2 min read

Review study strategy for this CLEP Biology question with the key prompt clue, correct-answer reasoning, distractor checks, and sources to verify next.

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