life sciences Memo 2 (English)

Exemplars 2014 — Grade 12 / Matric — life sciences

Memo 2014 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 11 pages 📝 29 items found 📚 3 topics

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Q1— Section header —

1.1.10(10 x 2\

1.2.1Recessive

1.2.2Locus

1.2.3Phenotype

1.2.4Autosomes

1.2.6Genetic engineering /DNA manipulation Biotechnology/DNA recombination Chromatids (6 x 1\ (6\

1.3.8Both A and B only B only A only B only A only None B only (8 x 2\

1.4.4(a\ RrYy (b\ rryy RY, Ry, rY, ry (a\ Wrinkled, yellow seeds

Q2— Section header —

2.1(a\ (b\ Ribosome (1\

2.1.2(a\ (b\ (1\

2.1.5DNA codes for a particular protein but cannot leave nucleus One strand of DNA is used as a template to form mRNA According to the codons on mRNA tRNA molecules with matching anticodons bring the required amino acids to the ribosome

2.2.2erectus afarensis (1\ (1\

2.2.4(a\ mya 2,4 mya = 0,6 mya 2,3 mya = 0,7 (b\ossils (a\

2.3.1The homologous chromosome pair does not separate /non disjunction during anaphase

2.4.1Diagram 1

2.4.2Diagrams 2 & 3 / 2 & 4/ 3 & 4

2.4.3Analogous structures show that two organisms evolved independently of each other Homologous structures show that two organisms have a common ancestor [40]40

2.3.3Down syndrome (1\

2.3.4During crossing over in Prophase 1 segments of chromatids of homologous chromosomes are exchanged leading to each gamete having a mix of genetic material from both parents (any 4\ During Metaphase I /II

3.1.1(a\ime (b\ Mortality of mosquitoes (1\ (1\

3.1.3Mosquito Mortality due to DDT /Resistance of mosquitos to DDT will decrease over time Mosquito Mortality due to DDT /Resistance of mosquitos to DDT will increase over time

Q3— Section header —

3.1.6Same species of mosquito Identical laboratory conditions for the full period of the investigation The same scientist must be used for the full period of the investigation Mosquitos should not be hurt for the full period of the

3.3.3phenotype Normal female Normal male genotype Meiosis , Y Fertilisation genotype

3.3.1(a\ (b\ (2\ (2\

3.3(2\ gametes 1 mark for correct gametes 1 mark for correct genotypes 10

Q4— Section header —

Topics Identified

Cell BiologyGeneticsEvolution

Mark Allocation

Total150 marks

Sections50 + 40 + 40 = 130 marks

Paper information

Subjectlife sciences

Year2014

SessionExemplars

TypeMemo

PaperPaper 2

LanguageEnglish

Pages11

Downloads3

Examination context

Decade2010s

Years ago12y

Season—

Start day—

Exam period—

Days since exam—

About life sciences examination preparation

Grade 12 Life Sciences combines biological knowledge with interpretation and scientific reasoning. Paper 1 covers molecular biology, genetics, and cell biology, while Paper 2 tests human physiology, ecology, and evolution.

Every available Grade 12 Life Sciences past paper and memorandum is collected in the Life Sciences hub at life-sciences.freemode.co.za — browse all years, sessions and languages in one place.

How to use this resource for revision

A past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

recalling biological concepts

applying knowledge to unfamiliar situations

interpreting diagrams and information

using scientific terminology

constructing precise written responses

A practical revision approach

Life Sciences rewards exact biological terminology — examiners deduct marks for paraphrased definitions. Create a glossary of key terms and practice using them in context.

Grade 12 subject hubs

Each matric subject has its own dedicated hub on Freemode with every past paper and marking memorandum we have archived for that subject.

➗ Mathematics View papers → 📊 Mathematical Literacy View papers → ⚗️ Physical Sciences View papers → 🧬 Life Sciences 📍 You are here 📒 Accounting View papers → 💼 Business Studies View papers → 📈 Economics View papers → 🌍 Geography View papers → 🏛️ History View papers → 📖 English View papers → 🇿🇦 Afrikaans View papers → 🗣️ IsiNdebele View papers → 🗣️ IsiXhosa View papers → 🗣️ IsiZulu View papers → 🗣️ Sepedi View papers → 🗣️ Sesotho View papers → 🗣️ Setswana View papers → 🌾 Agricultural Sciences View papers →

Corresponding examination paper

Examination paper available

Open the corresponding examination paper to practise the questions before reviewing the marking memorandum on this page. Attempt every question under timed conditions for the most realistic preparation.

life sciences Paper 2 (English) →

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