Skip to content

Course home

Sign up

1.1 Cell structure

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798
Question 47
F55%

In school laboratories, cultures are incubated at no higher than 25 °C. Why is this temperature used?

[1]
A

The enzymes of all species of bacteria are denatured above this temperature

B

Agar jelly melts above this temperature and would no longer stay solid

C

Pathogens that are harmful to humans are less likely to grow at this temperature

D

Bacteria are unable to reproduce by binary fission above this temperature

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