Lipids | Biology | Quiz | Visionlearning

Some functions of lipids include water-proofing, temperature regulation, and long-term energy storage. Which of the following is NOT a common type of lipids?

Fats

Oils

Sugars

Waxes
Oil and water don't mix because water has polar bonds while oils have nonpolar bonds.

true

false
Which of the following is the best explanation for why soaps can dissolve oily substances?

The hydrocarbon tails of soap are nonpolar so, they are soluble in oil.

The hydrocarbon tails of soap are polar so they are soluble in oil.

The charged groups in soap are polar so they are soluble in water.

The charged groups in soap are nonpolar, so they are soluble in oil.
Soap was invented during the Industrial Revolution of the 1800s.

true

false
Unsaturated lipids are generally liquid at room temperature because their hydrocarbons are _____________ packed because of their ____________ bonds.

tightly; double

tightly; single

loosely; single

loosely; double
Lipids serve a number of functions in living organisms. Which of the following does NOT match a lipid with its function.

Oils – waterproofing feathers and fur

Steroid hormones – energy storage

Carotenoids – light-absorbing pigments

Cholesterol – maintaining membrane fluidity
Which of the following statements best explains the reason trans fats have negative health effects?

Trans fats are made with vegetable oils.

Trans fats have a long shelf life.

Trans fats stay in the bloodstream longer than other lipids.

Trans fats have been hydrogenated to remove all of their double bonds.
Like soap, which of the following molecules is also amphophilic – having both a hydrophilic and hydrophobic end?

Steroids

Water

Waxes

Phospholipids
A steroid hormone has undergone a mutation that makes it polar instead of nonpolar. How might this interfere with its function?

The polar hormone won’t be able to pass through the cell membrane to reach its target.

The polar hormone won’t be able to travel in the bloodstream to reach its target.

The polar hormone will get stuck in the inside of the cell membrane.

The polar hormone wouldn't be released by glands.
Which of the following is an exception to the general rule that unsaturated fats come from plants and saturated fats come from animals?

Butter from a cow

Oil pressed from seeds or olives

Wax coatings on a leaf

Lard in fatty meats like bacon