Free Practice Questions for NSC Life Sciences
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Key Facts: NSC Life Sciences Exam
NSC Life Sciences consists of two external papers, each 2.5 hours long and worth 150 marks (Department of Basic Education).
Genetics and inheritance is the most heavily weighted Paper 2 topic, worth about 48 marks, followed by evolution at about 54 marks.
NSC results are reported on a 7-level scale, from Level 1 (0-29%) to Level 7 (80-100%, outstanding achievement).
The Taung Child, an Australopithecus africanus skull, was found in South Africa and described by Raymond Dart in 1925.
A dihybrid cross between two double heterozygotes gives the classic Mendelian phenotypic ratio of 9:3:3:1.
Life Sciences is set under the CAPS curriculum by the DBE and quality-assured and certified by Umalusi.
A monohybrid cross between two heterozygotes (Tt x Tt) produces a 3:1 phenotypic ratio and a 1:2:1 genotypic ratio.
Crossing over, a key source of genetic variation, occurs during Prophase I of meiosis.
The NSC Grade 12 Life Sciences exam is two written papers of 2.5 hours and 150 marks each, covering DNA, meiosis, reproduction, genetics, evolution and human physiology, graded on a 7-level scale.
Sample NSC Life Sciences Practice Questions
Try these sample questions to review concepts for the NSC Life Sciences exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which sugar is found in a DNA nucleotide?
2According to base-pairing rules in DNA, adenine always pairs with which base?
3Which nitrogenous base is present in RNA but absent in DNA?
4During DNA replication, the enzyme that joins free DNA nucleotides to the template strand is:
5DNA replication is described as semi-conservative because:
6The process by which mRNA is synthesised from a DNA template is called:
7A sequence of three bases on mRNA that codes for one amino acid is called a:
8During translation, transfer RNA (tRNA) functions to:
9If a DNA template strand reads TAC GGA, the corresponding mRNA codons would be:
10The genetic code is described as universal because:
About the NSC Life Sciences Exam
Life Sciences is a Grade 12 exit subject in South Africa's National Senior Certificate (NSC), set under the Curriculum and Assessment Policy Statement (CAPS) by the Department of Basic Education. The final external examination consists of two papers of 2.5 hours and 150 marks each, plus a school-based assessment (SBA) component. Paper 1 covers DNA, meiosis, reproduction, responding to the environment in humans, the endocrine system and homeostasis; Paper 2 covers DNA, meiosis, genetics and inheritance, and evolution. Each paper includes objective and short questions (Section A), structured questions (Section B) and longer essay-type questions (Section C). Results are reported on a 7-level achievement scale and contribute to a learner's university Admission Points Score (APS).
Exam sponsor: Department of Basic Education (DBE), quality-assured and certified by Umalusi. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
2.5 hours (150 minutes) per paper; two papers
Passing Score
7-level scale (Level 1: 0-29% up to Level 7: 80-100%); subject pass typically 30-40%
Exam / Certification Fees
No separate subject fee for full-time public-school candidates (state-funded); private/part-time NSC candidates pay DBE-set registration fees that vary by province and year.
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
DNA: Code of Life & Protein Synthesis
DNA/RNA structure, base pairing, replication, transcription, translation, the genetic code and DNA profiling.
Meiosis
Phases of meiosis, crossing over, random assortment, gamete formation and abnormalities such as Down syndrome.
Reproduction in Vertebrates & Human Reproduction
Reproductive strategies, fertilisation, the human reproductive systems, the menstrual cycle, hormones and the placenta.
Responding to the Environment (Humans)
Nervous system, neurons, the reflex arc, the eye and ear as receptors, and nervous-system disorders.
Endocrine System & Homeostasis
Hormones, negative feedback, blood glucose control, water balance via ADH and thermoregulation.
Responding to the Environment (Plants)
Plant hormones (auxin, gibberellin, abscisic acid, ethylene) and tropisms such as phototropism and geotropism.
Genetics & Inheritance
Mendelian crosses, monohybrid and dihybrid ratios, dominance variations, blood groups, sex linkage, mutations and pedigrees.
Population Ecology & Human Impact
Population growth curves, carrying capacity, limiting factors and human impacts including global warming and eutrophication.
Evolution & Natural Selection
Darwinism, Lamarckism, evidence for evolution, speciation, reproductive isolation and punctuated equilibrium.
Human Evolution / Hominids
Bipedalism, cranial capacity, African hominid fossils such as Australopithecus africanus (Taung Child) and the Out of Africa hypothesis.
Preparing for the NSC Life Sciences Exam
What You Need to Know
- Passing score: 7-level scale (Level 1: 0-29% up to Level 7: 80-100%); subject pass typically 30-40%
- Exam length: 100 questions
- Time limit: 2.5 hours (150 minutes) per paper; two papers
- Exam / certification fees: No separate subject fee for full-time public-school candidates (state-funded); private/part-time NSC candidates pay DBE-set registration fees that vary by province and year. Official sources
Using Our Practice Resources
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
NSC Life Sciences: Suggested Study Strategy
Frequently Asked Questions
How many papers are there in the NSC Grade 12 Life Sciences exam?
There are two external papers, each 2.5 hours long and worth 150 marks. Paper 1 covers DNA, meiosis, reproduction, the nervous and endocrine systems and homeostasis, while Paper 2 covers DNA, meiosis, genetics and inheritance, and evolution.
Who sets and administers the NSC Life Sciences exam?
The Department of Basic Education (DBE) sets the exam under the CAPS curriculum, provincial education departments conduct it, and Umalusi quality-assures and certifies the results.
How is NSC Life Sciences graded?
Results are reported on a 7-level achievement scale, from Level 1 (0-29%) up to Level 7 (80-100%, outstanding). A subject pass is typically 30-40% depending on the candidate's overall NSC pass requirements.
Is the NSC Life Sciences exam multiple-choice?
No. Each paper has a Section A with objective and short questions, a Section B with structured questions, and a Section C with longer essay-type questions. These practice MCQs are designed to drill the underlying CAPS content quickly.
What major topics should I focus on for Life Sciences?
Genetics and inheritance and evolution carry the largest weightings, followed by reproduction and DNA/protein synthesis. Knowing meiosis, human physiology (nervous, endocrine, homeostasis) and South African hominid fossils is also essential.