Nucleic Acids Flashcards
what are the 4 nitrogenous bases in DNA
cytosine
thymine
guanine
adenine
what are the 4 nitrogenous bases in RNA
cytosine
uracil
guanine
adenine
which nitrogenous DNA bases are purines
adenine and guanine
which nitrogenous DNA bases are pyrimidines
thymine and cytosine
how many rings do purines have
2
how many rings do pyrimidines have
1
what is the monomer of DNA
nucleotides
what do DNA nucleotides consist of
a nitrogenous base
a phosphate group
pentose deoxyribose sugar
what are the bonds involved in DNA
phosphodiester bonds
hydrogen bonds
where do phosphodiester bonds form in DNA
between phosphate group of one nucleotide and a sugar of the next which forms the sugar phosphate backbone.
DNA is …… stranded. The 2 strands are held together by …….. bonding between the ….. of the 2 strands
double
hydrogen
bases
A purine always pair with a ……….
pyrimidine
what are the complementary base pairs in DNA
thymine and adenine
cytosine and guanine
what is antiparallel
the two strands run parallel to eachother but in opposite directions
state 2 main types of nucleic acids
RNA- ribonucleic acid
DNA- deoxyribonucleic acid
nucleotide definition
monomers used to form nucleic acids
DNA strand definition
one of two polynucleotide chains that make up the double helix structure
state 3 main types of activity for which cells require energy
synthesis
transport
movement
2 similarities between ATP, DNA, RNA
-all have a pentose sugar in the middle
-all of them contain nitrogenous bases
2 differences between ATP, DNA, RNA
-DNA pentose sugar=deoxyribose, ATP and RNA= ribose
-ATP contains 3 phosphate groups per nucleotide, RNA and DNA contain 1 per nucleotide
Nucleic acid definition
chemical elements in them
large polymers formed from nucleotides
C H N P O
polymer definition
long-chain molecules composed of multiple bonded individual molecules (monomers) in a repeating pattern
double helix definition
two strands that wind around each other like a twisted ladder
outline structure of pyrimidines
smaller, contain single carbon ring structures
outline structure of purines
larger, contain double carbon ring structures
5 properties of ATP and why each makes it ideally suited to function as an energy transfer molecules
-small- moves easily into/out of and within cells
-water soluble- energy requiring processes happen in aq
-bonds between phosphates with intermediate energy- large enough to be useful for cellular reactions but not so large that energy is wasted as heat
-releases energy in small quantities- quantities are suitable to most cellular needs so energy is not lost as heat
-easily regenerated- can be recharged w energy
5 properties of ATP and why each makes it ideally suited to function as an energy transfer molecules
-small- moves easily into/out of and within cells
-water soluble- energy requiring processes happen in aq
-bonds between phosphates with intermediate energy- large enough to be useful for cellular reactions but not so large that energy is wasted as heat
-releases energy in small quantities- quantities are suitable to most cellular needs so energy is not lost as heat
-easily regenerated- can be recharged w energy