IB Biology - Topic 1.3

Front

Hydrophilic means...

Back

water-loving

Front

The function of the plasma membrane is....

Back

to regulate what enters and leaves the cell.

Front

Which letter indicates an integral protein?

Back

I

Front

Hydrophobic region of the cell membrane?

Back

E

Front

A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails.

Back

phospholipid

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What role do integral proteins play in the plasma membrane?

Back

Integral proteins assist in the transport of substances across the membrane.

Front

Define the term 'selectively permeable'.

Back

Selectively permeable means that a membrane allows certain substances to pass while blocking others.

Front

What is the significance of cholesterol in the plasma membrane?

Back

Cholesterol helps to stabilize the fluidity of the plasma membrane.

Front

What is the difference between hydrophilic and hydrophobic molecules?

Back

Hydrophilic molecules are attracted to water, while hydrophobic molecules repel water.