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Indiana State Assessments · ILEARN Biology ECA

Indiana ILEARN Biology ECA Practice Test

Build Indiana Biology readiness with five focused 10-question practice sets covering cells, genetics, ecology, evolution, energy, scientific practices, data, and evidence.

Indiana ILEARN Biology ECA practice sets

This Indiana ILEARN Biology ECA Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets cover cells and genetics, ecology and evolution, matter and energy in organisms, scientific practices and data, and integrated biology review.

Biology ECA skills

The Indiana Department of Education identifies ILEARN Biology as an end-of-course assessment completed after students finish a high school Biology course. These supplemental sets practice biological systems, heredity, energy and matter, ecology, evolution, models, data analysis, and evidence-based explanations.

How to use this page

Complete one 10-question set at a time. Read every model, graph, table, and evidence statement carefully, then review the explanation after each response.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Indiana Department of Education guidance, official materials, accommodations, or testing procedures.

For broader grade-level study paths, explore Elementary School Tests, Middle School Tests, and High School Tests.

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Indiana ILEARN Biology ECA Practice Questions

A 10-question Indiana ILEARN Biology ECA practice set on matter and energy in organisms, with answers and explanations.

Read each scenario, model, data table, or investigation carefully, choose one answer, and review the explanation after responding.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is the main purpose of photosynthesis?

Please select an answer first.

Correct answer: A

The correct answer is To store light energy in chemical energy..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Photosynthesis stores light energy in sugars made from carbon dioxide and water.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Photosynthesis stores light energy in sugars made from carbon dioxide and water.

2. QuestionMultiple choice

Which gas is used by plants during photosynthesis?

Please select an answer first.

Correct answer: B

The correct answer is Carbon dioxide.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Plants use carbon dioxide as a reactant in photosynthesis.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Plants use carbon dioxide as a reactant in photosynthesis.

3. QuestionMultiple choice

What is the main purpose of cellular respiration?

Please select an answer first.

Correct answer: C

The correct answer is To release usable energy from food molecules..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Cellular respiration transfers energy from food molecules into a usable form for cells.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Cellular respiration transfers energy from food molecules into a usable form for cells.

4. QuestionMultiple choice

Which molecule is the cell’s immediate usable energy source?

Please select an answer first.

Correct answer: D

The correct answer is ATP.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: ATP carries usable chemical energy for many cellular processes.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

ATP carries usable chemical energy for many cellular processes.

5. QuestionMultiple choice

Why does an enzyme speed up a chemical reaction?

Please select an answer first.

Correct answer: A

The correct answer is It lowers the activation energy needed for the reaction..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Enzymes act as catalysts and lower activation energy without being used up.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Enzymes act as catalysts and lower activation energy without being used up.

6. QuestionMultiple choice

What can happen to an enzyme if the temperature becomes too high?

Please select an answer first.

Correct answer: B

The correct answer is Its shape can change and it may stop working properly..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: High temperature can denature an enzyme and alter its active site.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

High temperature can denature an enzyme and alter its active site.

7. QuestionMultiple choice

Which process moves particles from an area of higher concentration to an area of lower concentration?

Please select an answer first.

Correct answer: C

The correct answer is Diffusion.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Diffusion moves particles down a concentration gradient.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Diffusion moves particles down a concentration gradient.

8. QuestionMultiple choice

Why does active transport require cellular energy?

Please select an answer first.

Correct answer: D

The correct answer is It can move substances against a concentration gradient..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Moving substances against the gradient requires energy, often supplied by ATP.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Moving substances against the gradient requires energy, often supplied by ATP.

9. QuestionMultiple choice

Which elements are especially important in the backbone of biological molecules?

Please select an answer first.

Correct answer: A

The correct answer is Carbon and hydrogen.

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Carbon and hydrogen form important structures in carbohydrates, lipids, proteins, and nucleic acids.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Carbon and hydrogen form important structures in carbohydrates, lipids, proteins, and nucleic acids.

10. QuestionMultiple choice

What is homeostasis?

Please select an answer first.

Correct answer: B

The correct answer is Maintaining relatively stable internal conditions..

  1. Read the Biology ECA task: Identify the biological system, evidence, relationship, or mechanism described in the question.
  2. Use the evidence: Homeostasis keeps internal conditions within ranges that support life.
  3. Check the claim: Confirm that the answer is supported by the model, data, scenario, or biological principle.

Homeostasis keeps internal conditions within ranges that support life.

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Frequently asked questions about Indiana ILEARN Biology ECA Practice

When is the Indiana Biology ECA taken?

The Indiana Department of Education identifies the Biology End-of-Course Assessment as an ILEARN assessment taken upon completion of the high school Biology course. Check the official ILEARN page for current participation guidance.

Which biology skills are included?

The practice sets include cells, genetics, ecology, evolution, matter and energy, homeostasis, scientific practices, data analysis, models, and evidence-based reasoning.

Are these official Biology ECA questions?

No. These are original supplemental practice questions. Check the official Indiana Department of Education ILEARN page for current blueprints, released items, accommodations, and testing procedures.