Mark Scheme (Results) January 2021 Pearson Edexcel International GCSE In Biology (4BI1) Paper 1B and Science (Double Award) (4SD0) Paper 1B

Mark Scheme (Results)


January 2021

Pearson Edexcel International GCSE
In Biology (4BI1) Paper 1B and Science (Double
Award) (4SD0) Paper 1B

,January 2021
Publications Code 4BI1_1B_2101_msc
All the material in this publication is copyright
© Pearson Education Ltd 2021

, 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)