Life Sciences Memo 2 (English)

November 2021 — Grade 12 / Matric — Life Sciences

Memo 2021 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 2 pages 📝 36 items found 📚 3 topics

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Q1— Section header —

1.2.6Phylogenetic tree cladogram Peptide bond Punctuated equilibrium Homologous structures Artificial selection

1.3.3oth A and B Both A and B None 3 x 2\ (6\

1.4.1(a\ (b\ (c\ Nitrogenous base /Guanine/Cytosine Deoxyribose sugar Hydrogen bond

1.4.2Nucleotide (1

1.4.3Double helix (1\

1.4.4(DNA\ Replication (1\

1.4.5Nucleus /Chromosome/Chromatid/ Chromatin/ Nucleoplasm Mitochondria (Mark first TWO only\ (2 (8\

1.5.1(a\ (b\ Testis Crossing over (1\ (1\

1.5(a\ (b\ (c\ Chiasma Centromere Chromatid (1\ (1\

1.6.1ffHh (1\

1.6(a\ (b\ (c\ (d\ Ff Hh

Q2— Section header —

2.1.1(a\ (b\ Nucleus /nucleoplasm Ribosome /c ytoplasm (1\ (1\

2.1.2DNA contains thymine /T whereas RNA contains uracil /U (Mark first ONE only\ (2\

2.1.3Transcription The double helix ( DNA molecule unwinds

2.2When chromosome pair 21 /chromosome 21 fails to separate during Anaphase the daughter cell

2.4.4AA and Aa (2\ (9\ Life Sciences/P2 DBE/November 2021 NSC Marking Guidelines

2.6.1Spine Hips (Mark first TWO only\ (2\ 2. .2

2.6.3To check for the gene mutation and if it results in the high bone density (2\

2.6.4Produces high bone density reduces the risk of bone fractures (1\

2.6x 100 = 65 OR x 100 5%

3.1.1The nucleus of the somatic cell is diploid / has a full set of chromosomes has all the genetic material whereas

3.1.2To ensure that: The DNA (of the ovum\ /characteristic of curly hair is removed Only the desired DNA

3.1.3Horse (1\

3.1.4To produce organisms with desired traits e.g. health, appearance, nutritious, yield, shelf life etc. Conservation of threatened species To create tissue/organs for transplant Any

3.2.1Biogeography (1\

3.2.2Similar organisms that can interbreed to produce fertile offspring (3\

3.2The original population common ancestor once lived on a large continent and

Q3— Section header —

3.3.1 It decrease the number of harmful bacteria the most

3.3.2atural selection occurs There is variation /mutation in the population

3.4.2Nutrition /food Protection Space Any (Mark first ONE only\

3.4.3here is a range of intermediate values in gall size (1

3.5.1(b\ (in any order\ (Mark first TWO only\

3.5.3The pelvis is long and narrow The spine

Topics Identified

Cell BiologyGeneticsEvolution

Mark Allocation

Total150 marks

Paper information

SubjectLife Sciences

Year2021

SessionNovember

TypeMemo

PaperPaper 2

LanguageEnglish

Pages12

Downloads3

Examination context

Decade2020s

Years ago5y

SeasonSpring (SH)

Start dayFriday

Exam periodNovember 2021

Days since exam1,814

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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