Select the correct statement.

The correct answer is Option (2)- The cytoplasm and nucleus are enclosed within the cell membrane, also called the plasma membrane.

The correct statement is:

The cytoplasm and nucleus are enclosed within the cell membrane, also called the plasma membrane.

Explanation:

The cell membrane, also known as the plasma membrane, is a semipermeable barrier that encloses the contents of a cell, providing structural support and maintaining the internal environment. Both the cytoplasm (a gel-like substance filling the cell) and the nucleus (containing genetic material) are enclosed within the cell membrane.

The other statements are not accurate:

• There are only 2 basic components of a cell-cytoplasm and nucleus: This statement oversimplifies the cell's structure. While the cytoplasm and nucleus are essential components, cells contain various organelles and structures with specific functions.
• The membrane separates ribosomes and mitochondria of a cell: Both ribosomes and mitochondria are cell organelles found in the cytoplasm of a cell, and they are not separated by a membrane. Ribosomes are involved in protein synthesis, and they can be found freely in the cytoplasm or attached to the endoplasmic reticulum. Mitochondria, on the other hand, are double-membraned organelles responsible for energy production through cellular respiration.
• The plasma membrane does not allow inward movement of the substance: The cell membrane is selectively permeable, meaning it allows certain substances to pass through while restricting the movement of others. It does permit inward movement of specific substances, but the extent depends on the nature of the substance and the properties of the membrane.