ACT Year 12 Biology Practice Questions

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ACT Year 12 Biology practice questions

Use Skill Align for ACT Year 12 Biology practice questions after the relevant science concept, data skill, or investigation skill has been taught.

27 practice skills

ACT Year 12 Biology includes 27 practice skills across Cells and systems, Biodiversity and ecosystems, Genetics and evolution, and Disease and biotechnology.

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Australian Years 7-12 Exercise and test mode Parent-managed access

What is a practice skill?

A practice skill is a focused topic or question type designed to help students practise one curriculum-aligned concept with instant feedback and explanations. Skill Align uses practice skills to organise questions by year level, subject, strand, and curriculum focus.

Sample practice questions

These sample questions are visible on the page before login. Use them to check the style of the answers and worked explanations, then open the no-login demo for a longer practice set.

practice ACT Year 12 Biology practice questions Molecular biology hard protein-synthesis diagram

1. The diagram shows DNA being transcribed into mRNA before translation. Which molecule carries the code to the ribosome?

Choices

mRNA
Cellulose
Insulin only
Starch

Explanation:

mRNA carries a transcribed copy of the genetic code from DNA to the ribosome.

practice ACT Year 12 Biology practice questions Genetics hard Punnett square

2. A Punnett square shows Hh x hh. What proportion of offspring are expected to be heterozygous?

Choices

Explanation:

The Hh parent can pass H or h, and the hh parent passes h. Half the offspring are Hh.

practice ACT Year 12 Biology practice questions Disease hard disease-spread graph

3. A disease graph shows case numbers flattening after contact tracing begins. Which effect best explains the graph?

Choices

Transmission chains were interrupted.
Genes stopped replicating in all cells.
The pathogen became a food web.
All hosts lost antibodies.

Explanation:

Contact tracing can reduce onward spread by identifying and isolating contacts.

practice ACT Year 12 Biology practice questions Immune response hard immune-response graph

4. The immune diagram shows a pathogen being engulfed and its antigen presented to other immune cells. Which process is represented?

Choices

Antigen presentation
Osmosis
Protein denaturation only
Carrying capacity

Explanation:

Some immune cells engulf pathogens and present antigen fragments to help activate specific immune responses.

practice ACT Year 12 Biology practice questions Biotechnology hard DNA gel diagram

5. A gel diagram shows lane 3 sharing all key bands with the reference sample. Which lane is the strongest match?

Choices

Lane 3
Lane 1
Lane 2
The ladder only

Explanation:

Matching band positions indicate the strongest DNA profile match.

practice ACT Year 12 Biology practice questions Evolution hard selection graph

6. An allele-frequency graph shows allele q decreasing from 0.60 to 0.35. What is directly supported?

Choices

Allele q became less common.
Allele q became fixed.
All alleles disappeared.
The graph shows only osmosis.

Explanation:

The plotted frequency falls over generations, so allele q became less common in the population.

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Related practice pages

These related pages help students and parents move from this search result to the exact year, state pathway, or subject they need.

Australian Years 11-12 Biology Practice Questions ACT Year 11 Biology practice questions ACT Biology Practice Questions ACT Year 12 Chemistry practice questions ACT Year 12 Physics practice questions

What this practice page covers

Year 12 Biology practice sits inside ACT BSSS senior Biology planning coverage across cells, systems, biodiversity, ecosystems, genetics, evolution, homeostasis, disease, biotechnology, and scientific inquiry, with Skill Align keeping the route focused on this senior year level.

Senior practice is organised by year level, topic, and mode so students can revise targeted areas rather than sitting a full-paper workflow every time.

Start with the public sample questions to check the question style, then use the curriculum coverage page to choose a topic that matches the student's current classwork.

Preview question styles

ACT Biology diagrams and data: Students inspect a state/year-specific mix of cell diagrams, DNA models, inheritance tables, ecosystem models, immunity diagrams, disease data, and selection graphs.
Year 12 Biology revision style: Samples focus on DNA, heredity, protein synthesis, immunity, disease transmission, biotechnology, and evolution without turning the page into a full exam paper.
Evidence-based explanations: Each item keeps the answer choices, biological visual, and explanation aligned so students can see why one option is best supported.

Suggested first practice steps

Preview the public sample questions before creating a saved student session.
Choose one focus area that has already been introduced at school.
Use exercise mode for immediate explanations, then test mode when the student is ready for delayed feedback.

Example focus areas

View full curriculum coverage

These examples are not the full topic list. Use the curriculum coverage page for the complete mapped pathway.

Cells and systems
Biodiversity and ecosystems
Genetics and evolution
Disease and biotechnology

Who it is for

ACT students studying Year 12 Biology.

Common search wording

ACT Year 12 Biology practice questionsACT Year 12 Biology questionsACT Biology Year 12 practiceACT Biology Year 12 practice questions

Questions parents ask

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No. Skill Align is designed for structured practice after students have learned topics at school or with a teacher.

Can parents choose only one subject?

Yes. Skill Align uses subject-based access, so families can start with the year level and subject the student needs now.

Skill Align independently prepares practice pathways aligned to publicly available curriculum and syllabus information. Official requirements should always be checked with the relevant authority.