bio mol Flashcards
the protien drawing chemically
H OH
-N-C-C
H O
DNA REP 1-4
1- h2 bonds broken by helicase dna
2- nucelotides in nucleus pair with free/open bases AT-CG
3- identical
4-phosphodiester bonds at new strands backbone between c3 and c5 by dna polymerase
h20 properties -5
1- metabolite= speeds up chem recations- condesnation and hydrolysis
2-good solvent- dissolves substances= easier transport
3- high specific heat capactiy- alot of ennergy required to raise temp ensuring stabilty of enxyme etc
4-large latent heat - lots of energy is needed to make watervapour due to many hydrogen bonds leading to less water loss
5- strong cohesion- can move up as one continuous string up zylem
food test- protine
biuret solutiun added-blue to purple= present
food test-starch
iodine solution=blueblack= present
food test lipids
add ethanol THEN water then shake and a white emulsion should form
food test- reducing sugar
food sample and benedict in equal volumes
in h20 bath for 5 mins- blue to green/yellow/orange/red= present
food test- non reducing sugar
new food sample add hcl and heat in bath to break glycosidic
add sodium hydrogen carbonate to neutralise so benidict can work
heat sample in h20 bath for 5 mins
if colour change present
starch structures- glucogen
1-4 and 1-6
alpha
insoluble
large and compact
starch structyre- amylose
1-4
alpha
insoluble
large and compact
starch structure amylopectin
1-4 and 1-6
alpha
insoluble
large and compact
starch - cellulose
1-4
alpha
insoluble
large and compact
microfibrils= hydrogen bonding is adjacent lots of them from strong threads of cellulose = strength for cell wall