biochem in cell Flashcards
“everything that living
things do can be
understood in terms of
the jigglings and
wigglings of atoms”
Richard Feynman
- Sperm fertilizing an
egg.
“Living things are composed of lifeless molecules”
Albert Lehninger
“Chemistry is the logic of biological phenomena”
Garrett and Grisham
complicated and highly organized
Living Organisms
serve functional purposes
Biological structures
actively engaged in energy
transformations
Living systems
have a remarkable capacity for self-
replication
Living systems
flows from photosynthetic organisms through
food chains to herbivores and on to carnivores at the apex of
the food pyramid
Solar energy
1st primary Producers
photosynthesis
1st primary Consumers
herbivores
2nd primary Consumers
Carnivores
Organisms capture energy in the form of special
energized molecules
ATP, NADPH
ATP structure draw
drawing
NADPH structure draw
drawing
Two complementary
polynucleotide chains running in opposite directions can pair
through hydrogen bonding between their nitrogenous bases.
Their complementary nucleotide sequences give rise to
structural complementarity.
DNA double helix
DNA double helix
5’ top
3’ bottom
Covalent bond
formation by e- pair sharing
makes _____ appropriate
for the support of life
H, O, C and N
make up 99+% of atoms in the human body
H, O, C and N
63% atoms in the human body
Hydrogen
25.5% atoms in the human body
Oxygen
9.5% atoms in the human body
Carbon
1.4% atoms in the human body
Nitrogen
What property unites H, O, C and N and renders
these atoms so appropriate to the chemistry of life?
ability to form covalent bonds by
electron-pair sharing
H-H bond
436 kJ/mol
