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Biology · 2023 · 3 marks
CBSE 2023 · Region 1 · Set 1 · Q25
(a) Differentiate between malignant and benign tumours. (b) Name and explain the most feared property of a malignant tumour.
(a)
Differentiate between malignant and benign tumours.
(b)
Name and explain the most feared property of a malignant tumour.
Marking-scheme solution
(a)
| S. No. | Malignant tumor | Benign tumor |
|---|---|---|
| $\displaystyle 1$ | Cells grow very rapidly and invade and damage the surrounding normal tissue. | Comparatively slow growth and remain confined to their original location and do not spread to other parts of the body |
| $\displaystyle 2$ | Show metastasis | Do not show metastasis |
(b)
Metastasis
Cells from these tumors slough off and reach distant sites through blood, wherever they get lodged in the body they start a new tumor there.
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.