Biology 9700/41 — May/June 2022
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Photosynthesis · Classification, Biodiversity and Conservation · Selection and Evolution · Control and Coordination · Genetic Technology · Homeostasis · +2 more
The golden mantella, Mantella aurantiaca, is a small terrestrial frog found in Madagascar.
Fig. 1.1 shows a golden mantella.
Name the domain and kingdom to which the golden mantella belongs.
domain = ______
kingdom = ______
The skin of the golden mantella is brightly coloured and contains a toxin.
Suggest a benefit to the frog of being brightly coloured.
The toxin in the skin of the golden mantella affects the action of the sarcomeres in muscle fibres (muscle cells) of mammalian striated muscle. The toxin inhibits a protein, , found in the membrane of the sarcoplasmic reticulum.
pumps calcium ions from the cytoplasm into the sarcoplasmic reticulum when the fibre is no longer stimulated.
Suggest the consequences to the sarcomere of the action of the golden mantella toxin.
Describe the role of calcium ions in a cholinergic synapse.
The rest of this paper
9 more questions- Q2Photosynthesis14M
- Q3Energy and Respiration · Photosynthesis9M
- Q4Genetic Technology9M
- Q5Selection and Evolution · Genetic Technology14M
- Q6Homeostasis10M
- Q7Inheritance8M
- Q8Classification, Biodiversity and Conservation12M
- Q9Homeostasis · Photosynthesis6M
- Q10Control and Coordination9M