Biology:18.1: Lipids

For each food listed below, choose whether it has all single carbon-to-carbon bonds or at least one double carbon-to-carbon bond.

-peanut butter: all single carbon-to-carbon bonds -sunflower oil: at least one double carbon-to-carbon bonds -cheddar cheese: all single carbon-to-carbon bonds

Use your knowledge of lipids to explain why desert plants need the waxy coating on their leaves to survive.

Desert environments lack water. All plants need water to survive. A waxy coating on plant leaves prevents water loss.

Which statement is true?

Fats are a type of lipid.

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

IT IS NOT THE FOLLOWING: C=H

Which lipid acts as a chemical messenger?

IT IS NOT THE FOLLOWING: adipose tissue

If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, what type of bond must exist between the carbon atoms?

IT IS NOT THE FOLLOWING: double

Write a summary statement for unsaturated fats including whether they are solids or liquids at room temperature and whether they have all single carbon-to-carbon bonds or at least one double carbon-to-carbon bond.

Unsaturated fats are liquids at room temperature and have at least one double carbon-to-carbon bond.

Which describes the basic structure of a fatty acid?

a long carbon and hydrogen chain and a carboxyl group

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

cell membranes

For each food listed below, choose whether it is a saturated fat or an unsaturated fat.

cream cheese, saturated fat vegetable oil, unsaturated fat corn oil, unsaturated fat

Which is a component of a phospholipid?

hydrophilic head

Which is one function of steroids?

serving as chemical messengers

Which is a main function of lipids?

providing energy storage

*QUIZ*

quiz questions are different for each person, if ou do not see your question here please add it.

Write a summary statement for saturated fats including whether they are solids or liquids at room temperature and whether they have all single carbon-to-carbon bonds or at least one double carbon-to-carbon bond.

Saturated fats are solids at room temperature and have all single carbon-to-carbon bonds.

Every day, people cook with and consume a variety of foods that contain lipids. Some foods are healthier sources of lipids than others. The table shows the amount of saturated fat in various foods.

butter

fat around organs phospholipids Hormones in the bloodstream Fat under the skin

protection structure of cell membranes chemical messenger insulation