1) What is a lipid? a) A lipid is a diverse group of organic compounds including fats, oils, hormones, and certain components of membranes that are grouped together because they do not interact appreciably with water. b) A lipid is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. c) Lipids are a type of macronutrient found in certain foods and drinks. 2) What are the three main functions of lipids? a) Repair and build your body's tissues, allows metabolic reactions to take place, and coordinate bodily functions. b) Storing energy signaling, and acting as structural components of cell membranes. c) Provide energy to the body, makes our body stronger, and prevents any infections. 3) What does the structure of a lipid typically made of? a) Carbon, hydrogen, and oxygen. b) Small organic molecules consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain. c) Glycerol backbone, two fatty acid tails or hydrophobic, and a phosphate group or hydrophilic. 4) These are some properties of lipids except for: a) They consist of long chains of α-amino (alpha-amino) acids. b) Lipids are energy-rich organic molecules, which provide energy for different life processes. c) Lipids are oily or greasy nonpolar molecules, stored in the adipose tissue of the body. 5) One of these statements is true about the two classifications of lipids. a) Nonsaponifiable lipids are the type of lipids that can be broken down into smaller molecules, while saponifiable lipids did not contain one or more ester groups and can be hydrolyzed in the presence of a base, acid, or enzymes.  b) Nonsaponifiable lipids are the type of lipids that cannot be broken down into smaller molecules, while saponifiable lipids contain one or more ester groups and can be hydrolyzed in the presence of a base, acid, or enzymes. c) None of the above.

Lipids

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