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Biological Molecules part 4
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nucleic acids
polymers specialized for the storage, transmission, & use of genetic info
DNA (deoxyribonucleic acid)
RNA (ribonucleic acid)
function of DNA
encodes hereditary info & transfers this info to messenger RNA (mRNA)
Info in mRNA is __
decoded to specify the sequence of amino acids in proteins
RNA has __
ribose
(page 91 on slide)
DNA has __
deoxiribose
lacks an Oxygen
(page 91 on slide)
The monomeric units of nucleic acids are __
nucleotides
Nucleotides consist of __
a pentose sugar
a phosphate group
a nitrogen-containing base
(page 93 on slide)
classes & subclasses of nitrogenous bases
Pyrimidines
: Cytosine (C), Thymine (T), Uracil (U)
Purines
: Adenine (A), Guanine (G)
Purines pair with pyrimidines by hydrogen bonding
(page 94 on slide)
The "backbone" of DNA & RNA is a chain of __ bonded by __
sugars & phosphate groups; phosphodiester linkages
The phosphate groups of DNA & RNA link __ in one sugar to __ in another sugar.
carbon 3'; carbon 5'
The two strands of DNA run in __ directions
opposite (antiparallel)
(page 98 on slide)
complementary base pairing in DNA
A-T (adenine-thymine)
C-G (cytosine-guanine)
Instead of __, RNA uses the base __
thymine (T); uracil (U)
RNA would have a A-U base pair.
other functions of nucleic acids
ATP
: energy transducer in biochemical reactions
GTP
: energy source in protein synthesis
cAMP
: essential to the action of hormones & transmission of info in the nervous system
structure of ATP
adenine
ribose
phosphate groups
(page 101 on slide)
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Author
sophathida
ID
323558
Card Set
Biological Molecules part 4
Description
Week 1, Ch. 2, 3
Updated
2016-09-25T22:18:38Z
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