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Arkansas ATLAS · Biology EOC · Science

Arkansas ATLAS Biology EOC Practice Test

Build Biology Arkansas ATLAS EOC readiness with five focused 10-question practice sets covering cells, energy, genetics, evolution, ecology, biological systems, and scientific evidence.

Arkansas ATLAS Biology EOC practice sets

This Arkansas ATLAS Biology EOC Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets support supplemental review of cells, transport, homeostasis, energy, genetics, evolution, ecology, biodiversity, and biological evidence.

Biology skills covered

  • Cell structures, membrane transport, enzymes, homeostasis, specialization, and biological organization
  • Photosynthesis, cellular respiration, ATP, fermentation, chloroplasts, mitochondria, and limiting factors
  • DNA, RNA, mutations, inheritance, meiosis, mitosis, karyotypes, and genetic variation
  • Natural selection, adaptation, common ancestry, fossils, speciation, artificial selection, and biodiversity
  • Food webs, energy flow, carrying capacity, interactions, nutrient cycles, invasive species, variables, and evidence

How to use this page

Complete one 10-question set at a time. Identify the biological process, connect evidence to the model, and review the explanation for every missed or guessed answer.

This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Arkansas Department of Education ATLAS guidance, official blueprints, accommodations, or testing schedules.

For the broader Arkansas assessment hub, visit Arkansas State Assessments.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

3. Test

Arkansas ATLAS Biology EOC Practice Questions

A 10-question Arkansas ATLAS Biology EOC practice set on genetics, dna, and inheritance, with answers and explanations.

Read each biology scenario 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 relationship between a gene and a chromosome?

Please select an answer first.

Correct answer: A

The correct answer is A chromosome contains many genes made of DNA.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Genes are segments of DNA arranged on chromosomes.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Genes are segments of DNA arranged on chromosomes.

2. QuestionMultiple choice

What is the role of messenger RNA in protein synthesis?

Please select an answer first.

Correct answer: B

The correct answer is It carries genetic instructions from DNA to a ribosome.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Messenger RNA carries a copied sequence from DNA to a ribosome, where the sequence helps direct protein assembly.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Messenger RNA carries a copied sequence from DNA to a ribosome, where the sequence helps direct protein assembly.

3. QuestionMultiple choice

What is a mutation?

Please select an answer first.

Correct answer: C

The correct answer is A change in the DNA sequence.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: A mutation changes genetic material and may have harmful, helpful, or neutral effects.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

A mutation changes genetic material and may have harmful, helpful, or neutral effects.

4. QuestionMultiple choice

A parent has two different alleles for a gene. What term describes the genotype?

Please select an answer first.

Correct answer: D

The correct answer is Heterozygous.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: A heterozygous genotype contains two different alleles for the same gene.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

A heterozygous genotype contains two different alleles for the same gene.

5. QuestionMultiple choice

If a trait is recessive, when is it generally expressed in a simple dominant-recessive model?

Please select an answer first.

Correct answer: A

The correct answer is When an individual has two recessive alleles.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: A recessive phenotype is expressed when no dominant allele masks the recessive allele.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

A recessive phenotype is expressed when no dominant allele masks the recessive allele.

6. QuestionMultiple choice

What is the expected phenotypic ratio from a cross of two heterozygous parents for a simple dominant trait?

Please select an answer first.

Correct answer: B

The correct answer is Three dominant phenotype to one recessive phenotype.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: A typical heterozygous cross produces three offspring with the dominant phenotype for every one with the recessive phenotype.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

A typical heterozygous cross produces three offspring with the dominant phenotype for every one with the recessive phenotype.

7. QuestionMultiple choice

How does meiosis contribute to genetic variation?

Please select an answer first.

Correct answer: C

The correct answer is It produces genetically different haploid cells through chromosome separation and recombination.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Independent assortment and crossing over during meiosis create new combinations of alleles.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Independent assortment and crossing over during meiosis create new combinations of alleles.

8. QuestionMultiple choice

What is the main result of mitosis?

Please select an answer first.

Correct answer: D

The correct answer is Two genetically similar daughter cells.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Mitosis supports growth and repair by producing daughter cells with the same chromosome number and genetic information.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Mitosis supports growth and repair by producing daughter cells with the same chromosome number and genetic information.

9. QuestionMultiple choice

What does a karyotype display?

Please select an answer first.

Correct answer: A

The correct answer is The number and appearance of an individual chromosomes.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: A karyotype organizes chromosomes so their number and structure can be examined.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

A karyotype organizes chromosomes so their number and structure can be examined.

10. QuestionMultiple choice

Why can siblings have different traits even when they share the same parents?

Please select an answer first.

Correct answer: B

The correct answer is They receive different combinations of parental alleles.

  1. Identify the biology idea: Decide whether the question is about cells, energy, genetics, evolution, ecosystems, body systems, or scientific evidence.
  2. Use the evidence: Meiosis and fertilization create different allele combinations in offspring.
  3. Check the claim: Make sure the answer matches the biological process, model, observation, or data described.

Meiosis and fertilization create different allele combinations in offspring.

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Frequently asked questions about Arkansas ATLAS Biology EOC Practice Test

Which Biology skills are covered?

The page covers cells, transport, homeostasis, energy, genetics, evolution, ecology, biodiversity, body systems, and biological evidence.

How many questions are included?

There are five practice sets with 10 questions each, for 50 questions in total. Each set can be completed separately.

Are these official ATLAS questions?

No. These are original supplemental practice questions. Check the latest Arkansas Department of Education information for official materials, standards, accommodations, and policies.