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Year 12 HSC Biology practice questions
This public preview page identifies the planned Year 12 HSC 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 HSC 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 HSC 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.
practiceHSC Year 12 Biology practice questionsHeredityhardPunnett square
1. Two carrier parents for a recessive condition are represented as Nn x Nn. What proportion of offspring are expected to be affected?
Choices
25%
50%
75%
0%
Explanation:
Only the nn genotype is affected. In an Nn x Nn cross, one of four boxes is nn.
practiceHSC Year 12 Biology practice questionsGenetic changehardprotein-synthesis diagram
2. The DNA model shows one base being replaced by another base within a gene. Which mutation type is shown?
Choices
Substitution
Deletion
Duplication of a chromosome
Crossing over
Explanation:
A substitution replaces one nucleotide with another without necessarily changing the length of the DNA sequence.
practiceHSC Year 12 Biology practice questionsInfectious diseaseharddisease-spread graph
3. A transmission graph shows cases falling after isolation reduces close contacts. Which change best explains the trend?
Choices
The reproduction number fell below 1.
The pathogen became a chromosome.
All hosts became vectors.
Mutation stopped immediately.
Explanation:
Reducing contacts can lower the average number of new infections per case below 1, so cases decline.
practiceHSC Year 12 Biology practice questionsNon-infectious disease and immunityhardimmune-response graph
4. The immune-response graph shows antibodies rising more quickly after vaccination and later exposure. What cell type explains this?
Choices
Memory lymphocytes
Red blood cells
Platelets only
Digestive enzymes
Explanation:
Vaccination can form memory lymphocytes that respond quickly during later exposure to the same antigen.
practiceHSC Year 12 Biology practice questionsBiotechnologyhardDNA gel diagram
5. A gel shows a suspect sample with bands matching lane 2 at all marked positions. Which lane best matches the suspect sample?
Choices
Lane 2
Lane 1
Lane 3
None of the lanes
Explanation:
A DNA profile match requires the same band positions across the compared lanes.
practiceHSC Year 12 Biology practice questionsHomeostasishardhomeostasis loop
6. A feedback model shows body temperature rising above the set point. Which response helps restore normal temperature?
Choices
Sweating increases heat loss.
Shivering increases heat production.
Blood vessels constrict only.
Temperature is not regulated.
Explanation:
Sweating and increased heat loss are negative feedback responses that oppose the temperature rise.
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 HSC 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 HSC Biology practice questions?
Not yet. The Year 12 HSC 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 HSC Year 11-12 Biology curriculum coverage page, where parents can compare the broader topic and pathway structure used for Skill Align practice.
