Biology 9700/41 — October/November 2016
Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Homeostasis · Control and Coordination · Inheritance · Photosynthesis · Genetic Technology · Selection and Evolution · +2 more
Diabetes insipidus (DI) is a condition that results in excessive thirst and the excretion of large amounts of dilute urine. A main cause of DI is a deficiency of ADH.
ADH normally binds to receptor proteins on cell surface membranes of cells in the collecting ducts of nephrons.
Outline the effect of ADH on the collecting ducts.
An inherited form of DI may be caused by faulty membrane receptors. These receptors are coded for by a sex-linked allele.
Explain the term sex linkage.
Use a genetic diagram to show how parents who do not have this condition can have a child with the inherited form of DI.
symbols
parental genotypes
gametes
offspring genotypes
offspring phenotypes
The rest of this paper
9 more questions- Q2Photosynthesis13M
- Q3Genetic Technology · Inheritance9M
- Q4Selection and Evolution13M
- Q5—10M
- Q6(outdated) Aspects of Human Reproduction8M
- Q7Control and Coordination10M
- Q8Control and Coordination · Energy and Respiration14M
- Q9Homeostasis15M
- Q10Control and Coordination · Homeostasis15M