AP Bio Unit 2 Review

Front

What type of substances can pass through the cell membrane most easily?

Back

Small, hydrophobic substances.

Front

What is the endosymbiotic theory?

Back

It suggests that mitochondria and chloroplasts evolved from prokaryotic cells engulfed by ancestral eukaryotic cells.

Front

What is a characteristic of peripheral proteins?

Back

They are unable to imbed themselves within the phospholipid bilayer.

Front

What type of fatty acid chains would you expect in the membrane of an organism living in a cold climate?

Back

Many unsaturated fatty acid chains to prevent tight packing of the phospholipids.

Front

What is one key difference between prokaryotes and eukaryotes?

Back

Eukaryotes contain membrane-bound organelles.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to maintain membrane fluidity and stability.

Front

What are the main components of the cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is the role of channel proteins in the cell membrane?

Back

They facilitate the transport of specific substances across the membrane.

Front

What is the significance of the fluid mosaic model?

Back

It describes the structure of the cell membrane as a mosaic of various components that move freely.

Front

How do saturated fatty acids affect membrane fluidity?

Back

They make the membrane less fluid due to tight packing.