Every day, people cook with and consume a variety of foods that contain lipids. The table shows the amount of saturated fat in various foods. Amount of Saturated Fat in FoodsFood (1 tbs or 14 g)Saturated fat (g)Olive oil2Margarine2Butter7Lard5Canola oil1Which food contains the most kcal/gram, based on the data in the table?

margarine

lard

butter

canola oil

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Lipids exhibit different characteristics based on their structures. The image shows different examples of lipids, such as solid butter and liquid canola oil.Photo by NIH/Bill BransonWhich type of bond is found in many carbon-to-carbon bonds in canola oil, but very few carbon-to-carbon bonds in butter?

C–C

C=C

C=H

C–H

In an oil spill, why does the oil not mix with the seawater?

Lipids are hydrophobic.

Lipids are hydrophilic.

Lipids are saturated.

Lipids are unsaturated.

Which statement best describes a direct result of damage to a phospholipid bilayer?

The balance of ions inside a cell will be disrupted and proteins could leak out because the phospholipid bilayer forms the cell membrane.

Energy storage will be disrupted because the phospholipid bilayer is responsible for storing energy in the body.

Chemical messages could not be sent to different parts of the body because the phospholipid bilayer forms hormones.

A person would be vulnerable to disease because the phospholipid bilayer helps to fight infections in the body.

If the last carbon atom of an unsaturated fatty acid is bonded to two hydrogen atoms and one carbon atom, what type of bond must exist between the last carbon and the other carbon atom?

single

double

triple

quadruple

Which is a main function of lipids?

providing energy storage

transmitting genetic information

forming bone and muscles

fighting infection and disease

Which fat is most likely a solid at room temperature?

one that is saturated

one that is unsaturated

one with double bonds

one that contains no hydrogen

Which describes the basic structure of a fatty acid?

a long carbon and hydrogen chain and a phosphate group

a long carbon and hydrogen chain and a glycerol

a long carbon and hydrogen chain and a carboxyl group

a long carbon and hydrogen chain and an alcohol

A biologist is studying a structure that is made up of two layers of phospholipids. What is she most likely studying?

DNA molecules

cell membranes

fats

wax

Which statement is true?

Lipids are a type of fat.

Fats are a type of lipid.

Fats and lipids are unrelated.

All lipids are fats, and all fats are lipids.

Lipids Answers

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