Which is one function of steroids?

waterproofing leaves and feathers

insulating and protecting bones and organs

serving as chemical messengers

providing energy storage

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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

The diagram shows the general structure of a lipid, which consists of two main parts.Which part is circled?

alcohol group

fatty acid

carboxyl group

unsaturated lipid

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.

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

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

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 fat has only single bonds between the carbon atoms in the fatty acid?

saturated

unsaturated