Question

1. the hydrolysis of a fat molecule (triacylglycerol) will yield: a. three fatty acids and one glycerol. b. three glycerols and one fatty acid. c. two fatty acids and three glycerols. d. one fatty acid, one amino acid, and one glucose. e. one fatty acid, one phosphate, and one glycerol. 15. which of the following statements concerning unsaturated fats is correct? a. they are more common in animals. b. they have no double bonds in the carbon chains of their fatty acids. c. they are generally liquid at room temperature. d. they contain more hydrogen than do saturated fats having the same number of carbon atoms. e. they have fewer fatty acids per fat molecule than do saturated fats. 16. the primary difference between the amino acids commonly found in proteins is in their: a. r or variable groups. b. number of potassium groups. c. number of phosphate groups. d. number of carbonyl groups. e. number of asymmetric carbons. 17. which of the following is responsible for the alpha - helical structure of proteins? a. hydrophobic interactions b. nonpolar covalent bonds c. ionic interactions d. hydrogen bonds e. polar covalent bonds 18. the primary building block (monomer) of proteins is a. a glucose molecule. b. a fatty acid. c. a nucleotide. d. an amino acid. e. four interconnected rings. this molecule transmits heredity information: cholesterol. adenosine triphosphate. nucleic acid. fatty acid. polysaccharide.

Explanation:

1. A fat molecule (triacylglycerol) is composed of glycerol and three fatty - acid chains. Hydrolysis breaks the bonds, yielding three fatty acids and one glycerol.
2. Unsaturated fats have double bonds in their fatty - acid carbon chains, which prevent them from packing tightly, making them generally liquid at room temperature.
3. Amino acids have a common structure with an amino group, a carboxyl group, a hydrogen atom, and an R or variable group. The R group gives each amino acid its unique properties.
4. The alpha - helical structure of proteins is stabilized by hydrogen bonds between the carbonyl oxygen of one amino acid and the amide hydrogen of another amino acid.
5. Proteins are polymers made up of amino - acid monomers.

Answer:

1. a. three fatty acids and one glycerol.
2. c. They are generally liquid at room temperature.
3. a. R or variable groups.
4. d. hydrogen bonds
5. d. an amino acid.