Biology 9700/42 — May/June 2020
Cambridge A-Level · worked solutions for every part, with the mark scheme
Topics Genetic Technology · Inheritance · Homeostasis · Classification, Biodiversity and Conservation · Selection and Evolution · Control and Coordination · +2 more
The enzyme alanine transaminase (ALT) is found in the liver. The function of ALT is to convert the amino acid -ketoglutarate into another amino acid, glutamate.
Suggest why the liver may need to convert one amino acid into another.
Tumours can form in the liver.
Explain how a liver tumour develops.
ALT can leak into the blood from liver tumour cells.
An increase in the concentration of ALT in the blood causes a decrease in the water potential of the blood.
State precisely the name and location of the cells where a change in the water potential of the blood would be detected.
Describe the homeostatic role of ADH when the water potential of the blood decreases.
The rest of this paper
9 more questions- Q2Inheritance · Genetic Technology12M
- Q3Selection and Evolution · Genetic Technology · Classification, Biodiversity and Conservation12M
- Q4Genetic Technology10M
- Q5Inheritance · Genetic Technology11M
- Q6Homeostasis · Control and Coordination11M
- Q7Energy and Respiration12M
- Q8Classification, Biodiversity and Conservation8M
- Q9Genetic Technology15M
- Q10Photosynthesis15M