GCSE Biology - What is Cancer? 'Benign' and 'Malignant' Tumours Explained #43

The video tutorial clarifies the difference between benign and malignant tumours, explaining that only malignant tumours are classified as cancer due to their ability to spread and cause damage. It highlights various risk factors for cancer, including lifestyle choices like smoking and obesity, as well as genetic predispositions such as BRCA genes linked to breast and ovarian cancer.

What is the main difference between benign and malignant tumours?

• Malignant tumours are contained within a membrane.

• Benign tumours can spread to other parts of the body.

• Malignant tumours are always harmless.

• Benign tumours are localized and not cancerous.

Why are malignant tumours considered more dangerous than benign tumours?

• They are always larger in size.

• They can invade other tissues and spread.

• They are less likely to recur.

• They are easier to treat.

Which lifestyle factor is strongly linked to lung cancer?

• Obesity

• Smoking

• Ultraviolet light exposure

• Alcohol consumption

Which of the following is NOT a cancer risk factor mentioned in the video?

• Ultraviolet light exposure

• Dietary habits

• Obesity

• Genetic inheritance

What genetic factor is linked to breast and ovarian cancer?

• BRCA genes

• Smoking

• UV radiation

• Alcohol consumption