Life Sciences Memo 1 (English)

November 2022 — Grade 12 / Matric — Life Sciences

Memo 2022 Grade 12 English Life Sciences Hub →

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🎯 150 marks 📄 10 pages 📝 42 items found 📚 4 topics

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Q1— Section header —

1.2.1ranium

1.2.2Thermoregulation

1.2.3Cataract

1.2.4Umbilical artery

1.2.5Hypothalamus

1.2.6Peripheral nervous system

1.2.7Chorionic villi

1.2.8Aldosterone

1.2.9Amnioti fluid

1.2.10Fovea centralis / y ellow spot (10 x 1\ (10

1.3.3B only A only Both A and B (3 x 2\

1.4.2(a\ (b\ (a\ (b\ Iris

1.4(a\ (b\ Circular muscles Circular muscles (1\ (1\

1.5.1Negative feedback mechanism (1\

1.5.2(a\ (b\ (c\ Thyroid TSH /thyroid stimulatin hormone Thyroxin

1.5.4Goitre Hormone A (1\ (1\ TOTAL SECTION A: 50

Q2— Section header —

2.1.1Seminal vesicle (1\

2.1.2Transports semen out of the body Mark first ON E only\ (1\

2.2.4Acrosome Fuses with the nucleus of the ovum Carries genetic material Any Produce energy

2.3.1Stimulates ovulation Stimulates the development of the corpus luteum (Mark the first TWO only\ (2\

2.1.5ransport its secretion in duct / secretion not directly in

2.3.2(a\ (b\ FSH /a high concentration of hormone

2.3.3The levels will remain low because the high progesterone levels during pregnancy will inhibit the secretion of FSH

2.5.2External fertilisation Their embryos develop inside eggs that are outside the body of the female (1\ (2\

2.5.5Graph X They will have a higher number of surviving embryos /eggs /offspring Because their fertilised eggs are attached to the vegetation

3.1.1pus callos um (1\

3.1.2It controls vital processes eartbeat/breathing which will stop when it is damaged

3.1.3(a\ (b\ Spinal cord The impulse s from the cerebrum are not transmitted to the skeletal

3.23.

2.1Africa (1\

3.2.2Not all brain injuries are recorded due to poor health facilities (2\

3.2.3Criteria for marking graph: Criteria Mark allocation Bar graph is drawn (T\ Caption of the graph includes both variables (C\ Correct labels on X

Q3— Section header —

3.3.1 Cochlea (1\

3.3.2(a\ Absorbs excess pressure waves /releases pressure from the inner ear / prevents an echo (Mark first ONE only\ (1\ (b\ It converts

3.3.4Part A/tympanic membrane will not be able to vibrate /vibrate freely No/less vibrations will be carried to the middle ear ossicles

3.4.1(a\ Wearing of a facemask (1\ (b\ Carbon dioxide levels in blood (1\

3.4.5Age Healthy individuals (Mark first TWO only\ 150 volunteers were used (Mark first ONE only\

3.4.6Receptors in the carotid artery are stimulated and impulses are sent to the medulla oblongata The medulla oblongata stimulates the heart to beat faster

3.5.4(Apical\ ip of the stem /apical bud (Apical\ of the root (Mark first TWO only\

Topics Identified

Cell BiologyGeneticsHuman PhysiologyRespiration

Mark Allocation

Total150 marks

Paper information

SubjectLife Sciences

Year2022

SessionNovember

TypeMemo

PaperPaper 1

LanguageEnglish

Pages10

Downloads5

Examination context

Decade2020s

Years ago4y

SeasonSpring (SH)

Start daySaturday

Exam periodNovember 2022

Days since exam1,451

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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