Starter quiz
- What is a gene?
- A biological catalyst.
- A short section of DNA. ✓
- A sub-cellular structure which surrounds the cell.
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- What process is used to create new cells for growth and repair in multicellular organisms?
- meiosis
- mitosis ✓
- fertilisation
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- What does obese mean?
- very overweight ✓
- very underweight
- healthy weight
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- Which of the following is not a lifestyle factor?
- drinking alcohol
- smoking
- genetic disease ✓
- using sunbeds
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- If smoking is a risk factor for developing lung cancer, which statement is true.
- Everyone who smokes will develop lung cancer.
- People who smoke have the same risk as non-smokers for developing lung cancer.
- People who smoke increase their chance of developing lung cancer. ✓
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- ______ is a chemical substance that carries the genetic information.
- 'DNA' ✓
Exit quiz
- What are tumours and cancer caused by?
- uncontrolled cell division ✓
- cell division suddenly stopping
- changes to the DNA of cells ✓
- the nucleus of cells dividing
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- Which statements are usually true for benign tumours?
- slow growing ✓
- invade surrounding tissue
- cancer causing
- contained within a membrane ✓
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Which type of tumour is shown below?- malignant tumour ✓
- benign tumour
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- Match the lifestyle risk factor to the type of cancer it is linked to.
- UV radiation⇔skin cancer ✓
- viral infection⇔cervical and liver cancers ✓
- smoking⇔lung, mouth, bowel, stomach and cervical cancers ✓
- obesity⇔bowel, liver and kidney cancers ✓
- Put these statements in order to show how a tumour can form.
- 1⇔A mutation causes a change in the nucleotide sequence of DNA.
- 2⇔A gene that controls the cell cycle is changed.
- 3⇔Cells begin to divide uncontrollably.
- 4⇔A tumour is formed.
- What are the three types of mutation?
- insertion, addition and deletion
- insertion, deletion and replacement
- insertion, deletion and substitution ✓
- conversion, deletion and substitution
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Cancer is caused by uncontrolled cell growth and division which can lead to the formation of tumours.
- Benign tumours are usually contained within one area and do not invade surrounding tissues.
- Malignant tumours are cancerous, they invade surrounding tissues and can cause secondary tumours.
- Scientists have identified lifestyle and genetic factors that can increase the risk of developing cancer.
- Mutations can cause changes in DNA; this alters the nucleotide sequence and genetic code
Common misconception
All tumours are cancerous and dangerous.
Students are given very clear examples of the difference between benign and malignant tumours. The difference between the two is covered in the slide deck, check for understanding questions and practice tasks.
Keywords
Mutation - A change in the nucleotide sequence of DNA that can cause mutated genes.
Genes - Short sections of DNA that code for a specific characteristic or protein.
Tumour - A mass of cells that has been produced through uncontrolled cell division.
Benign - A tumour that is non-cancerous and contained to one area.
Malignant - A tumour that is cancerous and can spread.
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