chapter 3

A molecule with the formula C 55H 110O 55 is probably a(n)

polysaccharide.

Which of the following statements regarding triglyceride molecules is false?

Triglycerides are hydrophilic.

Which of the following is an example of secondary structure in a protein?

an alpha helix

A hydroxyl group is

characteristic of alcohols

DNA differs from RNA because DNA

contains thymine in place of uracil

The storage form of carbohydrates is ________ in animals and ________ in plants.

glycogen . . . starch

The results of dehydration synthesis can be reversed by

hydrolysis

In what part of the world did the mutation for lactose tolerance first appear?

northern europe

Amino acids can be distinguished from one another by

the chemical properties of their R groups.

Proteins differ from one another because

the sequence of amino acids in the polypeptide chain differs from protein to protein.

Cows can derive nutrients from cellulose because

their intestinal tract contains cellulose-hydrolyzing microorganisms.

A disaccharide forms when

two monosaccharides join by dehydration synthesis

Peptide bonds

Bonds between amino acids

Which of the following statements about the monomers and polymers found in living organisms is false?

Monomers are joined together by the process of hydrolysis.