9700/41

Biology 9700/41October/November 2019

Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme

10
questions
100
marks
120
minutes

Topics Selection and Evolution · Inheritance · Classification, Biodiversity and Conservation · Energy and Respiration · Homeostasis · Genetic Technology · +2 more

Q1HomeostasisFree sample
(a)

ADH is a hormone that is released into the blood of a mammal when changes occur in the
internal environment.

(i)

State one change in the internal environment of a mammal that leads to the release
of ADH.

1M
(ii)

Name the part of the body that releases ADH into the blood.

1M
(b)

Fig. 1.1 shows a cell of one of the collecting ducts of the kidney.

Name membrane protein A and cell structure B.

A ______

B ______

2M
(c)

The phosphorylase enzyme stimulates structure B.

Describe the response of structure B to this stimulation and describe the consequences of
this response.

4M

The rest of this paper

9 more questions
  • Q2Selection and Evolution8M
  • Q3Genetic Technology14M
  • Q4Inheritance15M
  • Q5Photosynthesis14M
  • Q6Inheritance · Selection and Evolution · Classification, Biodiversity and Conservation8M
  • Q7Control and Coordination12M
  • Q8Energy and Respiration6M
  • Q9Classification, Biodiversity and Conservation15M
  • Q10Energy and Respiration15M
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