AP Biology Unit 1 Review

Front

Why does ice stay at the top of oceans instead of sinking to the bottom?

Back

Ice is less dense than liquid water.

Front

Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy?

Back

Lipids

Front

Polysaccharides are best described as:

Back

a complex molecules such as starches that are composed of many chains of sugar monomers.

Front

What is the reason large bodies of water do not quickly fluctuate in temperature?

Back

Water has a high heat capacity.

Front

What macromolecule makes up the cell membrane's lining?

Back

Phospholipids.

Front

Define density in the context of substances like ice and water.

Back

Density is the mass of a substance divided by its volume; ice is less dense than liquid water.

Front

What is the primary function of lipids in biological systems?

Back

Lipids serve as a source of long-term energy and are important for cell membrane structure.

Front

Explain the structure of polysaccharides.

Back

Polysaccharides are long chains of sugar monomers linked together, forming complex carbohydrates.

Front

What property of water allows it to stabilize temperatures in large bodies of water?

Back

Water's high heat capacity allows it to absorb and retain heat without significant temperature changes.

Front

What are phospholipids and their role in cell membranes?

Back

Phospholipids are molecules with a hydrophilic head and hydrophobic tails, forming the bilayer of cell membranes.