Skip to content

Course home

Sign up

1.1 Cell structure

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798
Question 2
70%

During a food safety investigation, a sample of gravy is kept under conditions that allow bacteria to reproduce. At the end of 3 hours and 30 minutes, the sample contains 4.48 × 105 bacteria. The bacteria have a mean division time of 30 minutes.

How many bacteria were in the sample when the investigation began?

[1]
A

5.7344×1075.7344 \times 10^75.7344×107

B

2.24×1052.24 \times 10^52.24×105

C

7.0×1037.0 \times 10^37.0×103

D

3.5×1033.5 \times 10^33.5×103

Markscheme

1.1 Cell structure Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structure

282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank