Exploring Lipids in Macromolecules

What are common sources of lipids?

• Fruits and vegetables

• Grains and nuts

• Water and minerals

• Butter and oils

Why do lipids not dissolve in water?

• Because they contain only hydrogen

• Because they are small molecules

• Because they are non-polar

• Because they are polar

What is the primary function of lipids in the body?

• Immediate energy use

• Long-term energy storage

• Structural support in cells

• Short-term energy storage

What part of the phospholipid is attracted to water?

• Glycerol head

• Fatty acid tails

• Hydrophobic tails

• Carboxyl group

Which type of lipid is primarily involved in forming cell membranes?

• Triglycerides

• Steroids

• Waxes

• Phospholipids

What distinguishes triglycerides from other lipids?

• They cannot be digested

• They contain phosphorus

• They are made of three fatty acids and one glycerol

• They are only found in animals

Which lipid type acts as a waterproof barrier in plants and animals?

• Steroids

• Phospholipids

• Waxes

• Triglycerides

What is the difference between saturated and unsaturated fats?

• Unsaturated fats are liquid at room temperature; saturated are solid

• Saturated fats have double bonds; unsaturated do not

• Unsaturated fats have no hydrogen atoms

• Saturated fats are healthier than unsaturated fats

What role do steroids play in the body?

• They store energy

• They help in digestion

• They act as chemical messengers

• They provide structural support

How do phospholipids contribute to the cell membrane's function?

• They form a single-layered membrane

• They prevent any molecules from passing through

• They are entirely hydrophilic

• They create a bilayer that is semi-permeable