Question

1. soaps and detergents are able to remove oil, grease, etc from items because the

______ end of the soap molecule bonds with the stains while the \other\ end of
the soap molecule bonds with
a. hydrophobic; water
b. hydrophobic; stains
c. hydrophilic; water
d. hydrophilic; stains

1. we can identify whether or not a lipid is saturated or unsaturated, by its

physical state. unsaturated fats are ______ and saturated fats are
a. solid, liquid
b. liquid, solid
c. liquid, less dense liquid
d. unbreakable, solid

1. waxes and steroids are both considered to be

a. proteins
b. carbohydrates
c. lipids
d. nucleic acids

1. protein, carbohydrate, and nucleic acid molecules are the result of smaller molecules

bonded together. the process that occurs to attach these smaller molecules to one
another is
a. hydrolysis
b. dehydration lysis
c. hydrosynthesis
d. dehydration synthesis

1. which protein structural level would be least affected by disruptions in the

hydrogen - bonding process?
a. primary
b. secondary
c. tertiary
d. quaternary

1. rna and dna differ in that they utilize different ______ within their

nucleotides. rna utilizes ______ and dna utilizes

Explanation:

• Question 30: Soap molecules have a hydrophobic end (which bonds with non - polar stains like oil and grease) and a hydrophilic end (which bonds with water).
• Question 31: Unsaturated fats have double bonds that prevent them from packing tightly, so they are liquid at room temperature. Saturated fats have no double bonds and pack tightly, so they are solid.
• Question 32: Waxes and steroids are both classified as lipids. Lipids are a diverse group of hydrophobic molecules.
• Question 33: Dehydration synthesis is the process by which smaller molecules (monomers) are joined together to form larger molecules (polymers) with the loss of water.
• Question 34: The primary structure of a protein is the sequence of amino acids, which is held together by peptide bonds. Hydrogen bonds are involved in secondary, tertiary, and quaternary structures.
• Question 35: RNA and DNA differ in their nitrogenous bases. RNA uses uracil, and DNA uses thymine.

Answer:

• 30. a. hydrophobic; water
• 31. b. liquid, solid
• 32. c. lipids
• 33. d. dehydration synthesis
• 34. a. primary
• 35. nitrogenous bases; uracil; thymine