Some bacterial cell membranes contain proteins called porins - VCE - SSCE Biology - Question 2 - 2010 - Paper 1
Question 2
Some bacterial cell membranes contain proteins called porins. A porin is a pipe-like structure made of a single amino acid chain that embeds itself into the membrane... show full transcript
Worked Solution & Example Answer:Some bacterial cell membranes contain proteins called porins - VCE - SSCE Biology - Question 2 - 2010 - Paper 1
Step 1
Cell membrane:
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Answer
The cell membrane acts as a barrier that regulates the movement of substances in and out of the cell, thus maintaining homeostasis. It provides structural support and protects the internal components of the cell from the external environment.
Step 2
Porin:
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Answer
Porins facilitate the passive transport of small molecules and ions across the cell membrane, allowing essential nutrients and ions to enter the cell while preventing the passage of larger molecules.
