SACE Biology, Stage 2.

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Question 1
The genetic code: each mRNA codon, read 5' to 3', with its amino acid
First baseSecond base USecond base CSecond base ASecond base G
UUUU Phe, UUC Phe, UUA Leu, UUG LeuUCU Ser, UCC Ser, UCA Ser, UCG SerUAU Tyr, UAC Tyr, UAA stop, UAG stopUGU Cys, UGC Cys, UGA stop, UGG Trp
CCUU Leu, CUC Leu, CUA Leu, CUG LeuCCU Pro, CCC Pro, CCA Pro, CCG ProCAU His, CAC His, CAA Gln, CAG GlnCGU Arg, CGC Arg, CGA Arg, CGG Arg
AAUU Ile, AUC Ile, AUA Ile, AUG MetACU Thr, ACC Thr, ACA Thr, ACG ThrAAU Asn, AAC Asn, AAA Lys, AAG LysAGU Ser, AGC Ser, AGA Arg, AGG Arg
GGUU Val, GUC Val, GUA Val, GUG ValGCU Ala, GCC Ala, GCA Ala, GCG AlaGAU Asp, GAC Asp, GAA Glu, GAG GluGGU Gly, GGC Gly, GGA Gly, GGG Gly
The coding strand of a short gene from a Barossa grapevine reads 5' GCATGTGGAAACATTAGC 3'. Translation starts at the first start codon and ends at the first stop codon. Based on the genetic code table, which polypeptide is made from this gene?

Four topics, one 130-minute e-exam

Built for Stage 2 Biology on the SACE Board subject outline: all four topics (DNA and proteins, cells as the basis of life, homeostasis, evolution), with multiple-choice and written questions in the style of the 130-minute e-exam. Not built for Stage 1 Biology or for the school assessment tasks.

Topic 1: DNA and proteins

Topic 2: Cells as the basis of life

Topic 3: Homeostasis

Topic 4: Evolution

SectionWhat it asksTime
Section 1Multiple-choice questions across the four topics: 10 questions from 2026 (15 in 2024 and 2025).About 25 minutes in 2024 and 2025
Section 2Questions in parts, often on data, diagrams or a science-as-a-human-endeavour context, some drawing on more than one topic.The rest of the 130 minutes

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