Scientists examine four samples of body cells, W, X, Y and Z, following different viral infections.

Which set of observations best explains how a viral disease has led to cancer?

In sample X, infected cells are destroyed, while neighbouring cells divide in a controlled way to repair the tissue.

In sample Y, virus-free cells form a contained benign tumour, while the infected cells remain outside the tumour.

In sample Z, an immune reaction makes the infected tissue swell, while the cells in the tissue do not divide.

In sample W, cells containing the virus begin to divide uncontrollably, while cells without the virus continue to divide normally.

Scientists examine four samples of body cells, W, X, Y and Z, following different viral infections.

Which set of observations best explains how a viral disease has led to cancer?

In sample X, infected cells are destroyed, while neighbouring cells divide in a controlled way to repair the tissue.

In sample Y, virus-free cells form a contained benign tumour, while the infected cells remain outside the tumour.

In sample Z, an immune reaction makes the infected tissue swell, while the cells in the tissue do not divide.

In sample W, cells containing the virus begin to divide uncontrollably, while cells without the virus continue to divide normally.

2.2 Animal tissues, organs and organ systems

2.2 Animal tissues, organs and organ systems Questions