Life Sciences Memo 1 (English)

Feb-March 2014 — Grade 12 / Matric — Life Sciences

Memo 2014 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 12 pages 📝 35 items found 📚 3 topics

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Q1— Section header —

1.1.10x 2\

1.2.1Sickle cell anaemia

1.2.2Genotype

1.2.3Extinction

1.2.4Genome

1.2.5Bipedal /Bipedalism

1.2.6Diploid

1.2.7Chiasma Chiasm ata

1.2.8Karyogram Karyotype (8\

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

1.4.3(2\ (6\ [50] TOTAL SECTION A:50

Q2— Section header —

2.1Translation

2.1.4(a\ Peptide bond (b\ Ribosome (a\ Glutamate roline (b\ istidine (1\

2.2.3thymine Frame shift mutation he mutated sequence will have 1 amino acid short he amino acid sequence changes from that point onwards resulting in fferent protein ing

2.32.3.1 /parent phenotype ortoise shell female orange male enotype Meiosis /gametes Fertilisation

2.3.3The allele for the trait is carried on the X chromosome only chromosome does not carry the allele for the trait The tr ait only shows when it is in the heterozygous

Q3— Section header —

3.1Effective harvesting of food source Competition for food is reduced Any 1x2 (Mark first ONE only\ There was variation in a population

3.2Australopithecus afarensi is the common ancestor in both models Homo heidelbergensis evolved from Homo ergaster Homo heidelbergensis is a common ances tor for

3.2.4Australopithecus Homo Prominent brow ridge present No prom inent brow ridge Prognathous face protruding jaws prognathus

3.3(a\ rowth of bacteria the diameter of the area with no bacterial growth (b\ Same strain of bacteria Same amount of bacteria in all the petri dishes Same amount of agar medium LL measurements of the diameter should be done by the same

1.0- 1.5

1.6- 2.0

2.1- 2.5

2.6- 3.0

3.1- 3.5

3.6- 4.0

4.1- 4.5

4.6- 5.0 Birth weight (kg\ Number of babies surviving SECTION C

Q4— Section header —

4.1.1Checklist for the mark allocation of the graph Correct type of graph (histogram\ Title of graph Correct label for X axis (including unit\ and Y axis Appropriate scale for X

4.1.3Polygenic inheritance Polygenic inheritance: Genes are found at different/multiple loci One gene inheritance: Gene found at one locus Polygenic inh eritance: Has a range of intermediate phenotypes for the trait

4.2.5Scientists compared the DNA profile obtained in the test with the unique DNA profile of different organisms The cost of the kudu meat might be high The availability of the

Topics Identified

Cell BiologyGeneticsEvolution

Mark Allocation

Total150 marks

Sections50 + 30 + 30 = 110 marks

Paper information

SubjectLife Sciences

Year2014

SessionFeb-March

TypeMemo

PaperPaper 1

LanguageEnglish

Pages12

Downloads5

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 1 (English) →

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