State the different nitrogenous bases found in the nucleotides that make up DNA.

State the properties of the WatsonCrick model of DNA in the following categories: a. number of polynucleotide chains b. polarity (running in same direction or opposite directions) c. bases on interior or exterior of molecule d. sugar/phosphate on interior or exterior of molecule e. which bases pair with which f. right- or left-handed helix

RNA differs from DNA in that the base _______________ is substituted for _______________. (a) adenine; uracil (b) uracil; thymine (c) guanine; uracil (d) cytosine; guanine (e) guanine; adenine

Explain how single nucleotide changes can have vastly different effects on protein function.

Which of the following does cytosine pair with? a. guanine b. thymine c. adenine d. a pyrimidine

Describe the components of a nucleotide. Name some nucleic acids and nucleotides, and discuss the importance of these compounds in living organisms.

a. Can a mutation change a proteins tertiary structure without changing its primary structure? b. Can a mutation change a proteins primary structure without affecting its secondary structure?

A beginning genetics student is attempting to complete an assignment to draw a base pair from a DNA molecule. The drawing is incomplete, and the student does not know how to finish. He asks for your advice. The assignment sheet shows that the drawing is to contain three hydrogen bonds, a purine, and a pyrimidine. From your knowledge of the pairing rules and the number of hydrogen bonds in A/T and G/C base pairs, what base pair do you help the student draw?

The building blocks of nucleic acids are ____. a. sugars b. nitrogenous bases c. peptides d. nucleotides

Uracil ________. contains nitrogen is a pyrimidine is found in RNA all of the above