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PEARSON EDEXCEL GCSE BIOLOGY PAPER 1B MARK SCHEME 2021
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PEARSON EDEXCEL GCSE BIOLOGY PAPER 1B MARK SCHEME 2021
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PEARSON EDEXCEL GCSE BIOLOGY PAPER 1B MARK SCHEMEwww.igexams.com
2021
Mark Scheme (Results)
January 2021
Pearson Edexcel International GCSE
In Biology (4BI1) Paper 1B and Science (Double
Award) (4SD0) Paper 1B
, www.igexams.com
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January 2021
Publications Code 4BI1_1B_2101_msc
All the material in this publication is copyright
© Pearson Education Ltd 2021
, www.igexams.com
Question Answer Mark
Number
1(a) 1
The only correct answer is B 1
A is not correct as 0 is not the correct number of
chromosomes
C is not correct as 2 is not the correct number of
chromosomes
D is not correct as 23 is not the correct number of
chromosomes
Question Answer Mark
Number
1(b) An explanation that makes reference to the following points: 2
• energy / ATP / respiration /eq (1)
• movement / swimming / tail movement/ eq (1)
Question Answer additional Mark
Number guidance
1(c) An explanation that makes reference to two of 2
the following points:
• digest / break down egg membrane / eq ignore wall /
(1) shell etc
• allow (nucleus) to enter / penetrate egg
(1)
• fertilisation / fusion (1)
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