Which of the following molecules is nonpolar?
C2H6
Two molecules with identical molecular formulas but that have different structures are called
isomers
Which of the following has identical molecular formulas but different structures and characteristics?
isotopes
Which of the molecules is polar and acts like a base?
R-NH2
Which functional group characterizes alcohols?
OH
Which functional group forms covalent bonds between peptide chains to stabilize the tertiary structure of proteins?
SH
Which of the followign is a polymer?
a protein
Which of the following is a polymer of glucose?
cellulose
A disaccharide, such as maltose, consists of two molecules of glucose linked by what type of bond?
glycosidic
Which of these is NOT a lipid?
cholesterol
Which of the following is NOT a property of a fat or fatty acid?
They are both soluble in water
The sequence of amino acids in a protein is its______structure.
primary
A protein _______ structure contains helixes and sheets that form from hydrogen bonding between carboxyl and amino groups of the polypeptide chain?
secondary
Acetic acid gives vinegar it sour taste. Which functional group is an acid?
-COOH
Which portion of an amino acid is unique between the 20 different amino acids?
the side chain or R-group
Which is true of the nucleotide base composition within the DNA double helix?
T+A=C+G
Which of the following statements BEST summarizes structural differences between DNA and RNA?
DNA contains a different sugar then RNA
An amino acid is to protein as a ______is to a nucleic acid.
nucleotide
Friedrich Wohler refuted the scientific concept of vitalism during the early 1800s by provig that organic molecules could be synthesized outside a living organism.
True
Macromolecules such as lipids and carbohydrates are produced from monomers through condensation reactions.
True
The sole function of carbohydrates is to serve as energy stores.
True
Saturated fats are composed of fatty acids with several double bonded carbons.
True
The primary structure of a protein ultmately determines its three-dimensional structure.
False
The four nucleotide bases found in DNA are identical to those in RNA.
False
Which of the following endings will tell you that a molecule is an enzyme?
-ase