Skip to content

Course home

Question bank·1.2 What happens in cells (and what do cells need)?
Sign up

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

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849
Question 40
H

A student investigates the effect of temperature on the activity of amylase.

Every 30 seconds, the student tests a drop of the reaction mixture with iodine solution.

The student records the time when the iodine solution no longer turns blue-black.

Which change would make the time measured more precise?

[1]
A

Test a drop of the mixture every 101010 seconds instead.

B

Use a more concentrated iodine solution in each well.

C

Increase the range of temperatures tested in the investigation.

D

Use a larger volume of starch solution at every temperature.

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.

More questions