bio paper 6 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

why is it better to correct several results

A

identify anomalous results

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

test and result for starch

A

starch use iodine solution, turns blue black if positive negative if orange/brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

test and result for protein

A

biuret
blue= neg
purple/ lilac= positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

test and result for fats

A

ethanol emulsification test needs to add water as well
produces milky white precipitate if positive
neg= continues colourless

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

test and result for reducing sugar

A

benedicts solution, must use warm water bath
rainbow closer to red= pos
closer to blue= neg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

test and result for vitamin c

A

dcpip
blue= negative
colourless= positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how do you test a leave for starch

A

drop into very hot/ boiling water for one minute (to destroy cell membrane so chlorophyll molecules can pass through)
drop into hot ethanol to remove dissolve the green chlorophyll
place leaf into water to rehydrate and soften the leaf so that it can spread out
drop iodine solution onto the leaf to test for starch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly