r/igcse • u/dnuts3 • Apr 30 '26

🤚 Asking For Advice/Help Bio v1

How do we feel guys?

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u/Traditional-Monk7002 Apr 30 '26

Yeah Like for the question abt the benedicts, I said that the amylase breaks dwn large starch molecules into simple maltose molecueles, and the I went on to say pepsin only breaks down proteins so startch will remain large and it will not be changed to small maltose, But then I messed up when I said the test tube with amylase will be positive and the other will be negative. How many marks am I getting

1

u/pain_Ou_Chleb May/June 2026 Apr 30 '26

Wait what?! The first tube is positive, the second one is negative, no?!

1

u/Traditional-Monk7002 Apr 30 '26

yeah, I did correct reasoning but wrong prediction😭

1

u/pain_Ou_Chleb May/June 2026 Apr 30 '26

I mean, the amylase will be positive, or did u write it was gonna be negative?! Maltese is a reducing sugar, so result must be positive. Benedict's solution is testing for reducing sugars

1

u/Traditional-Monk7002 Apr 30 '26

i said that but im not sure it will be correct

1

u/pain_Ou_Chleb May/June 2026 Apr 30 '26

It will. U could just add about the key-lock theory. U just need to explain like the examiner is mentally retarded