Homework Ch. 3

Nucleic acids are polymers of ____________.

The monomers of nucleic acids consist of a phosphate group, a five-carbon sugar, and a ________________.

____________________ provides directions for its own replication. It also directs cell activities by providing instructions for building proteins.

A gene provides the directions to build a molecule of ________________; the genetic instructions it carries are then translated into the amino acid sequence of a protein.

A polynucleotide has a repeating ______________ backbone.

The structure of DNA is a ____________, held together by the complementary base-pairing of cytosine with guanine, and adenine with thymine.

RNA usually consists of a single ____________ strand.

Proteins are polymers of _____.

What type of bond joins the monomers in a protein's primary structure?

Alpha helices and beta pleated sheets are characteristic of a protein's ___________________.

The secondary structure of a protein results from _____.

Tertiary structure is NOT directly dependent on _____.

Which of these is NOT a lipid? -RNA -wax -phospholipid -steroids -cholesterol

The fatty acid tails lack ______________.

______________ are composed of a phosphate group, a glycerol, and fatty acids.

Which of these is rich in unsaturated fats: -butter -beef fat -a fat that is solid at room temperature -olive oil -lard

_____________ is an important component of animal cell membranes.