Question

Mention any three characteristics of cancer cells.

Answer 1

Hint: Cancer is a term used to describe a group of diseases characterised by abnormal cell proliferation that has the potential to infiltrate or spread to other parts of the body. Benign tumours, on the other hand, do not spread. A lump, unusual bleeding, a persistent cough, unexplained weight loss, and a change in bowel movements are all possible indications and symptoms.

Complete answer:
Cancer cells have aberrant membranes, cytoskeletal proteins, and shape, and they proliferate and divide at an excessively high rate. Cell abnormalities can progress over time, progressing from normal cells to benign tumours to malignant tumours.
They identified six key changes in cell physiology that characterise malignancy.
1. Cancer cells gain an autonomous drive to proliferate - pathological mitosis - when oncogenes like ras or myc are activated, resulting in self-sufficiency in growth signals.
2. Insensitivity to growth-inhibitory (antigrowth) signals: tumour suppressor genes, such as Rb, that ordinarily block growth, are inactivated in cancer cells.
3. Cancer cells repress and inactivate genes and processes that typically allow cells to die, evading programmed cell death (apoptosis).
4. Cancer cells activate certain gene pathways that make them immortal even after generations of growth, allowing them to replicate indefinitely.
5. Sustained angiogenesis occurs when cancer cells have the ability to draw their own blood and blood vessels, a process known as tumour angiogenesis.
6. Cancer cells develop the ability to travel to other organs, invade other tissues, and colonise these organs, culminating in their spread throughout the body.

Note:
Cancer is a broad term for a group of disorders characterised by abnormal cell proliferation with the ability to invade and spread to other parts of the body. They are a kind of neoplasm. A neoplasm or tumour is a collection of cells that have grown out of control and frequently form a lump or mass, but can also be dispersed widely.