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1.2 What happens in cells (and what do cells need)?

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Question 26
F

A student investigates the breakdown of starch by amylase.

Every 30 seconds, the student adds a drop of the reaction mixture to iodine solution on a spotting tile.

Which observation shows that all of the starch has been broken down?

[1]
A

The iodine solution stays orange-brown.

B

The iodine solution turns blue-black.

C

The iodine solution turns brick red.

D

The iodine solution turns purple.

Markscheme

1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

184 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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