bio mol Flashcards

1
Q

the protien drawing chemically

A

H OH
-N-C-C
H O

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2
Q

DNA REP 1-4

A

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

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3
Q

h20 properties -5

A

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

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4
Q

food test- protine

A

biuret solutiun added-blue to purple= present

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5
Q

food test-starch

A

iodine solution=blueblack= present

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6
Q

food test lipids

A

add ethanol THEN water then shake and a white emulsion should form

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7
Q

food test- reducing sugar

A

food sample and benedict in equal volumes
in h20 bath for 5 mins- blue to green/yellow/orange/red= present

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8
Q

food test- non reducing sugar

A

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

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9
Q

starch structures- glucogen

A

1-4 and 1-6
alpha
insoluble
large and compact

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10
Q

starch structyre- amylose

A

1-4
alpha
insoluble
large and compact

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11
Q

starch structure amylopectin

A

1-4 and 1-6
alpha
insoluble
large and compact

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12
Q

starch - cellulose

A

1-4
alpha
insoluble
large and compact
microfibrils= hydrogen bonding is adjacent lots of them from strong threads of cellulose = strength for cell wall

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