Question

Fill in the blanks by choosing the correct alternative from those given in the brackets.

• A. Semipermeable
• B. Fully permeable

Answer 1

Semipermeable:

Semipermeable membranes only allow the passage of selected specific molecules and particles through them.

Fully permeable:

Fully permeable membranes allow the passage of all types of molecules through them.

Plasma membrane:

1. The plasma membrane is the lipoprotein covering of cells.
2. The plasma membrane is semipermeable, which means it allows only selected molecules to pass through it.
3. It usually allows small molecules such as water, carbon dioxide, oxygen, etc. to pass through it.
4. It does not allow large molecules such as glucose and amino acids to pass through it.

Final answer: The plasma membrane is semipermeable.