Although the main role of carbohydrates and lipids is to provide energy; vitamins, minerals, and must also be present in the cell.

Water

Explanation:

There are 6 nutrients in the body which helps in keeping the body healthy. These components are carbohydrates, fats and proteins. These molecules helps in providing energy to the body.

The vitamins minerals and water is equally important for the cells as it helps in carrying out various types of reactions inside the body.

All the macro and micro nutrients are important for keeping the body healthy.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.