Mark Scheme (Results)

January 2020

Pearson Edexcel International GCSE in

Biology (4BI1)

Paper 1BR

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January 2020

Publications Code 4BI1_1BR_msc_20200305

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Question

Number

Answer Mark

1(a)

liver

1

Question

Number

Answer Mark

1(b)

B ovary (1)

A is incorrect because the brain does not produce

progesterone

C is incorrect because the pituitary does not produce

progesterone

D is incorrect because the testis does not produce

progesterone

1

Question

Number

Answer Mark

1(c)

D yes yes (1)

A is incorrect because both organs excrete

B is incorrect because the kidney excretes

C is incorrect because the skin excretes

1

Question

Number

Answer Additional

guidance

Mark

1(d) A description that makes reference to three of

the following points:

• protease / pepsin / peptidase (1)

• digest / breaks down protein (1)

• hydrochloric acid (1)

• kill pathogens / eq / optimum pH ignore

germs (1)

• churning/ mechanical digestion (1)

Allow lipase

digest lipid as

alternative

to mp1 and 2

3

Total = 6 marks

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