Biology Question (Federal Book)

[shariq123]

I have a few questions
First of all if you have the Federal Biology book
Please go to Chapter 5 Nutrition Pg. 67
Test Yourself 5.3
5.3 I dont understand a-g ( dont need to sketch the graph)

Next from chapter 9 Digestion
Pg. 93
Investigation 6.3
I dont understand 1b, 3, 4, 5a-c

I would appreciate it if someone could help

Next there is a MCQ from the past papers that i dont understand
it is as follows :

Q. 10 cm^3 of 1% starch suspension was incubated with 10 cm^3 of a 10% amylase solution for five minutst at 37 celcius. Samples were then tested with iodine solution and with benedict's solution, What are the expected results for each?

Color with Iodline Solution: Black or Brown
Color with Bendicts slution- blue or brick-red?

Please explain with the answer

Thanks

 

[hassan100]

I think for the MCQ part , colour with iodine solution will be brown becauze no starch is present all of it is digested by amylase

and the colour with benedict solution will be be brick red because starch has been converted to maltose(reducing sugar) which show red brick colur in this reducing sugar solution