Year 12 SACE Biology sample questions

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Year 12 SACE Biology practice questions

Use this no-login public demo to preview Skill Align's Year 12 SACE Biology sample questions, explanations, exercise mode, and test mode before regular practice.

Sample-question focus

Try a short public sample of Year 12 SACE Biology questions selected from the reviewed Skill Align demo set.

Skills covered

Practice cells, living systems, ecosystems, genetics, evolution, biodiversity, disease, biotechnology, and scientific inquiry.

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Sample practice questions

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practice SACE Year 12 Biology practice questions DNA and proteins hard protein-synthesis diagram

1. The protein-synthesis diagram shows mRNA leaving the nucleus for a ribosome. What process produced the mRNA?

Choices

Transcription
Osmosis
Mitosis
Active transport

Explanation:

Transcription uses a DNA template to make mRNA before translation at the ribosome.

practice SACE Year 12 Biology practice questions Inheritance hard Punnett square

2. A Punnett square shows Rr x Rr. What proportion of offspring are expected to show the recessive phenotype?

Choices

25%
50%
75%
100%

Explanation:

The recessive phenotype appears only in rr offspring, one of the four boxes.

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

3. The infection graph shows a lower peak after vaccination coverage increases. What is the best explanation?

Choices

Fewer susceptible hosts reduced transmission.
Vaccines made pathogens reproduce faster.
Antibodies are not involved.
The disease became inherited instantly.

Explanation:

Vaccination can reduce the number of susceptible hosts, lowering transmission and the case peak.

practice SACE Year 12 Biology practice questions Immunity hard immune-response graph

4. An antibody diagram shows one antibody shape binding strongly to antigen X but not antigen Y. What does this show?

Choices

Antibody specificity
Osmosis
Photosynthesis
Carrying capacity

Explanation:

Antibodies have binding regions that are specific to particular antigen shapes.

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

5. A gel electrophoresis result shows a DNA fragment close to the wells and another much further down the gel. Which fragment is larger?

Choices

The fragment closer to the wells
The fragment furthest down the gel
Both fragments are proteins
Distance does not relate to size

Explanation:

Larger DNA fragments move more slowly through the gel and stay closer to the wells.

practice SACE Year 12 Biology practice questions Homeostasis hard homeostasis loop

6. A homeostasis loop shows water loss increasing blood solute concentration. Which response helps conserve water?

Choices

More ADH is released.
Less water is reabsorbed only.
The kidneys stop filtering blood.
Antibodies carry water.

Explanation:

ADH increases water reabsorption by the kidneys, helping restore water balance.

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Practice Summary

Year 12 · SACE Biology · Test mode · 22 questions · 10 min

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Correct answers Pending

Score -

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SACE Biology practice questions FAQ

Does this page include Year 12 SACE Biology practice questions?

Yes. This public demo includes reviewed Year 12 SACE Biology sample questions so families can preview the Skill Align practice style before regular use.

Can students try the demo without signing up?

Yes. The public demo can be opened without signing up, and the attempt stays in the page instead of being saved to a student record.

How does this demo relate to curriculum coverage?

This demo is linked with the SACE Year 11-12 Biology curriculum coverage page, where parents can compare the broader topic and pathway structure used for Skill Align practice.