Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
what are dna and rna considered
|
nucleic acids
|
|
|
what is the structure of dna and rna
|
polymers
|
|
|
what is the subunit of the polymer dna and rna
|
nucleotides
|
|
|
biggest difference in dna and rna
|
ribose has one more oxygen
|
|
|
two linked rings of atoms are what type of nitrogenous bases
|
purines
|
|
|
what are the two purines
|
guanine and adenine
|
|
|
single rings in the nitrogenous bases are called what
|
pyrimidines
|
|
|
what are the three pyrimidines
|
cytosine thymine and uracil
|
|
|
dna and rna are what type of nucleotides? think numbers
|
polynucleotides
|
|
|
polynucleotides are always assembled in the what direction
|
5 to 3
|
|
|
which polynucleotide only has one strand
|
rna
|
|
|
the dna chains are oriented in opposite directions and held together by what type of bond
|
h bond
|
|
|
the nitrogenous base is on tope bonded to _____ in the middle then that is bonded to ____ on top left
|
nitrogenous base is bonded to the sugar which is then bonded to the phosphate group
|
|
|
what linkage forms the backbone of a nucleic acid
|
sugar phosphate linkage
|
|
|
if a dna double helix is 100 nucleotide PAIRS long and contains 25 adenine bases, how many guanine bases does it have
|
100 nucleotide pairs are a total of 200 nucleotides. Because of base pairing, if there are 25 adenine there must also be 25 thymine. This leaves 200–50 = 150 nucleotides to be divided evenly between guanine and cytosine.
|
|
|
what is the primary function of rna molecules
|
synthesis of proteins
|
|
|
A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of
|
120 thymine and 120 adenine molecules.
|
