Course home

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73

Question 3

A student measures the time taken for amylase to break down starch. The table shows the times recorded in four repeat trials.

Trial	Time taken for starch to disappear in $s\text{s}$
1	38
2	40
3	57
4	42

Use the results to calculate the mean rate of starch breakdown in $s−1\text{s}^{-1}$ .

[3]

Markscheme

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

GCSE
Biology
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.

Question bank