4 Lipids

Macromolecules

Lipids

Fill in the Blanks

What is the function of lipids?

Multiple Select

What elements are lipids composed of?

• nitrogen

• hydrogen

• oxygen

• carbon

Multiple Choice

Outline the structure of a lipid subunit.

• Fat subunits are long and skinny.

• Fat subunits are composed of glycerol and a fatty acid.

• Fat is the subunit of a lipid.

• Fat subunits are composed of hydrogen and carbon.

Multiple Choice

What is the result of dehydration synthesis between three fatty acids and a glycerol?

• Palmitic Acid

• Trans Fats

• Triglyceride

• Water

Multiple Select

Fats are

• Non-polar

• Polar

• Hydrophilic

• Hydrophobic

Multiple Choice

Which of the following bonds can NOT be found in saturated fats?

• C-C

• H-C

• C=C

• C-O

Multiple Choice

Which of the following bonds can be found in unsaturated fats?

• N-O

• C=C

• H-H

• N-N

Multiple Choice

Are phospholipids hydrophobic or hydrophilic?

• Hydrophobic

• Both

• Hydrophilic

• Neither

Multiple Choice

Which of the following statements regarding lipids is most accurate?

• Lipids are synthesized by ribosomes.

• The empirical formula for lipids is typically C₁H₂O₁.

• Saturated fats tend to be liquid at room temperature due to hydrogen bonding.

• Polyunsaturated fats tend to be liquid at room temperature due to numerous double bonds in the hydrocarbon chains.

Open Ended

Explain why phospholipids are important to the function of cells.