HL1 Fall Semester Review 2024

Front

What is a saturated fat?

Back

A saturated fat is a type of fat that has single bonds between carbon atoms in its hydrocarbon chain.

Front

What is a polyunsaturated fat?

Back

A polyunsaturated fat contains double bonds between carbon atoms in its hydrocarbon chain.

Front

True or False: The phospholipid bilayer forms with the hydrophobic heads facing outwards and the hydrophilic tails facing inwards.

Back

False. The hydrophilic heads face outwards and the hydrophobic tails face inwards.

Front

What is the function of the phospholipid bilayer of the cell membrane?

Back

The phospholipid bilayer allows small, non-polar molecules to pass through the cell membrane.

Front

Which molecule diffuses through the lipid bilayer of a plasma membrane most rapidly?

Back

O2 (oxygen) diffuses through the lipid bilayer most rapidly.

Front

How does pH affect protein structure?

Back

Changes in pH can affect the charges on the R-groups and disrupt ionic bonds.

Front

What are the components of a phospholipid?

Back

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

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane.

Front

Define diffusion in the context of cell membranes.

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration across a membrane.

Front

What type of molecules can easily pass through the lipid bilayer?

Back

Small, non-polar molecules can easily pass through the lipid bilayer.