Chapter 4 Nucleic Acids and RNA World.

Both DNA and RNA ________

are information-containing molecules

what is the variable structure of a nucleotide?

the sugar and the base

which of the following is the difference between RNA and DNA

RNA has ribose sugar and DNA has deoxyribose sugar

compare proteins to nucleic acids . which of the following is true?

both have primary and secondary structure

If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?

40

why is it that RNA can catalyze reactions but DNA cannot?

the sugar of RNA is much more reactive than the sugar of DNA

what feature of single nucleotide provides the energy needed for polymerization when nucleic acids are formed?

their phosphate group

what is the structural feature that allows DNA to replicate?

complementary pairing of the nitrogenous bases

the difference between sugar in DNA and sugar in RNA is that the sugar in DNA ________

contains one less oxygen atom

which of the following are pyrimidine nitrogenous bases?

cystosine and uracil

which of the following includes all of the pyrimidines found in RNA and DNA

cytosine, uracil, and thymine

which of the following best describes DNA secondary structure?

double antiparrallel helical strands

which of the following are purine nitrogenous bases?

guanine and adenine

what is the difference between a ribonucleotides and deoxyribonucleotide?

ribonucleotides have a hydroxyl group of 2 carbon of their sugar subunit

DNAase is an enzyme that catalyzes the hydrolysis of the convalent bond that join nucleotides together. what would happen first to DNA molecules treated with DNAase?

the phosphodiester bonds between deoxyribose sugars would be broken

when nucleotides polymerize to form nucleic acid_______

a covalent bond forms between the sugar of one nucleotide and the phosphate of a second

which of the following descriptions best fits the class of molecules known as nucleotides?

a nitrogenous base, a phosphate group, and a sugar

Nucleic acids are polymers made up of which of the following monomers?

nucleotides