Biology · Biological Molecules

Protoplasm is regarded as the physical basis of life because it encompasses the living material within a cell, consisting of carbohydrates, proteins, lipids, nucleic acids, and inorganic salts. It is essential for all life processes and functions within the cell. The other options, such as nucleotides and proteins, the nucleus, and the cell itself, are important components of living organisms but do not encompass the entirety of what constitutes the physical basis of life.

Nucleotides are the building blocks of DNA and RNA, containing genetic information, while proteins are essential molecules with various functions in the body. However, they are components within cells, not the fundamental physical basis of life.

The nucleus is an organelle within cells that contains the genetic material. It plays a crucial role in cell function but is not the physical basis of life itself.

Cells are the basic structural and functional units of life. They contain protoplasm, which is considered the physical basis of life, but the cell itself is not the answer.

Protoplasm is the living content of a cell, made up of a mixture of macromolecules and inorganic compounds. It is considered the physical basis of life as it is essential for all cellular processes.