A-LevelBiologyCell membranes and transport9700/12 · May/June 2020 · Q161 Mark

What is the role of G protein in cell signalling?

Ato act as a membrane-bound enzyme

Bto act as a switch releasing a second messenger

Cto amplify the original signal

Dto change the shape of the protein receptor

✓ Correct answer

B: to act as a switch releasing a second messenger

Oracle Prep sorts past-paper questions by topic, so you can drill Cell membranes and transport and see which topics are most likely to come up next.

Topic: Cell membranes and transport, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2020 Paper 1 Variant 2, question 16.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

When living pancreatic cells were placed in a solution of a red stain called neutral red, the cytoplasm became red. T…

Which relationships could be investigated using a colorimeter? 1 the effect of light intensity on the rate at which a…

Which transport mechanism does not require a concentration gradient to be present in order to take place?

Rifampicin is an antibiotic used to treat tuberculosis. It works by inhibiting RNA polymerase in bacteria. Which of t…

Which statements correctly describe transport pathways in dicotyledonous plants? 1 In the symplast pathway, water may…

Which feature of transport in plants is correct for both xylem and phloem?