biology practical

[Snowysangel]

HOW WAS EVERYONE'S PAPER TODAY?
u guys found it hard or easy ?
and wht abt expected grade threshold?

Thresholds gonna be the same as it is every year...depends on how many marks we lose individually cause they cut marks for the tiniest mistajes!

 

[princessnoor]

Thresholds gonna be the same as it is every year...depends on how many marks we lose individually cause they cut marks for the tiniest mistajes!

well lets see.
and how was ur ppr?

 

[princessnoor]

what did ascorbic acid presence did to starch?
i wrote tht it breaks starch to smaller pieces nd so it can diffuse through visking tubing
cuz otherwise it cant come out

 

[Haris123]

what did ascorbic acid presence did to starch?
i wrote tht it breaks starch to smaller pieces nd so it can diffuse through visking tubing
cuz otherwise it cant come out

Lol no. It was an inhibitor.

 

[princessnoor]

Lol no. It was an inhibitor.

yes may b i messed up with question 1

 

[princessnoor]

Lol no. It was an inhibitor.

i think my values for idonie volume were wrong but can i still get 2 marks?
and how did it acted as inhibitor

 

[princessnoor]

wht about question 2 , in the slide i draw (file:///C:/Users/prado/Desktop/Nimra/Untitled.png)
is that correct?

 

[Snowysangel]

It wasnt an inhibitor...inhibitors attach to substances...ascorbic acid doesn't do that. Besides inhibitors are usually involved in reactions concerning enzymes

 

[princessnoor]

It wasnt an inhibitor...inhibitors attach to substances...ascorbic acid doesn't do that. Besides inhibitors are usually involved in reactions concerning enzymes

(http://aob.oxfordjournals.org/content/65/3/281 )look here

 

[Snowysangel]

(http://aob.oxfordjournals.org/content/65/3/281 )look here

What does it say?

 

[princessnoor]

What does it say?

starch-iodine reaction is strongly inhibited by ascorbic acid

 

[Snowysangel]

starch-iodine reaction is strongly inhibited by ascorbic acid

That's what I wrote the reaction is inhibited

 

[Snowysangel]

Are we sure that everyone's do ecquth the practical btw

 

[princessnoor]

then y u said "It wasnt an inhibitor...inhibitors attach to substances...ascorbic acid doesn't do that. Besides inhibitors are usually involved in reactions concerning enzymes"

 

[princessnoor]

w

Are we sure that everyone's do ecquth the practical btw

wht did u say?

 

[Snowysangel]

then y u said "It wasnt an inhibitor...inhibitors attach to substances...ascorbic acid doesn't do that. Besides inhibitors are usually involved in reactions concerning enzymes"

Just because. Is everyone done with the practical

 

[princessnoor]

Just because. Is everyone done with the practical

may be

 

[happyperson]

Hey i wrote that ascorbic acid reacts with iodine and forms a complex and doesn't let starch and iodine to react. I didn't use the word inhibit but it means same thing i guess, so will i be able to gain marks in this part?
Guys, what was the trend in recording table, volume or iodine used was increasing or decreasing?

 

[Karim Nabil]

who did p32 ?
it was super easy for me, how about you guys ?

 

[samantha liyanage]

what did ascorbic acid presence did to starch?
i wrote tht it breaks starch to smaller pieces nd so it can diffuse through visking tubing
cuz otherwise it cant come out

it inhibits the reaction between iodine and starch.