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Year 12 ACT Biology practice questions
This public preview page identifies the planned Year 12 ACT Biology demo route and links it to curriculum coverage while the reviewed sample question set is being completed.
Sample-question focus
The planned public sample is for Year 12 ACT Biology practice and will open after the demo questions are reviewed.
Skills covered
Practice cells, living systems, ecosystems, genetics, evolution, biodiversity, disease, biotechnology, and scientific inquiry.
Exercise and test mode
The route is public now; the exercise and test preview will become available after the curated question set is ready.
Curriculum link
Compare this demo with the ACT Year 11-12 Biology curriculum page to scan related topics, subtopics, and pathway coverage.
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.
practiceACT Year 12 Biology practice questionsMolecular biologyhardprotein-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.
practiceACT Year 12 Biology practice questionsGeneticshardPunnett square
2. A Punnett square shows Hh x hh. What proportion of offspring are expected to be heterozygous?
Choices
50%
25%
75%
0%
Explanation:
The Hh parent can pass H or h, and the hh parent passes h. Half the offspring are Hh.
practiceACT Year 12 Biology practice questionsDiseaseharddisease-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.
practiceACT Year 12 Biology practice questionsImmune responsehardimmune-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.
practiceACT Year 12 Biology practice questionsBiotechnologyhardDNA 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.
practiceACT Year 12 Biology practice questionsEvolutionhardselection 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.
For parents checking senior maths readiness
Year 10 practice can help identify whether a student is comfortable with algebra, geometry, trigonometry, statistics, and probability before choosing senior maths pathways. The demo is a quick way to sample those areas without creating an account.
This demo is in progress
In progress
Year 12 ACT Biology is available to purchase, and the public demo preview is still being prepared.
Students can use the purchased subject once subscribed; this anonymous preview will be opened after the curated public question set is ready.
Does this page include Year 12 ACT Biology practice questions?
Not yet. The Year 12 ACT Biology demo route is public, but the interactive sample questions will open after the reviewed public set is ready.
Can students try the demo without signing up?
No sign-up is required to view the preview status. The no-login interactive demo will be available after the sample set is completed.
How does this demo relate to curriculum coverage?
This demo is linked with the ACT Year 11-12 Biology curriculum coverage page, where parents can compare the broader topic and pathway structure used for Skill Align practice.
