Pearson Edexcel International GCSE (9–1) 4BI1/1BR 4SD0/1BR Biology UNIT: 4BI1 Science (Double Award) 4SD0 PAPER: 1BR May 2024 merged with mark scheme

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Number Number




Paper


Biology ■ ■


UNIT: 4BI1
Science (Double Award) 4SD0
PAPER: 1BR




Pearson Edexcel International GCSE (9–1) 4BI1/1BR 4SD0/1BR
Biology UNIT: 4BI1 Science (Double Award) 4SD0 PAPER: 1BR
May 2024 merged with mark scheme




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P75814A
©2024 Pearson Education Ltd.
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, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an
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answer, put a line through the box and then mark your new answer with a cross .
1 The image shows some cells from onion epidermis.



nucleus



cell wall


cytoplasm
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(Source: © TED KINSMAN / SCIENCE PHOTO LIBRARY)

(a) (i) Some structures in these onion cells are also found in human red blood cells.
Which row in the table is correct for human red blood cells?
(1)


Cell wall Cytoplasm Nucleus

A absent absent absent
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B absent absent present


C absent present absent


D present present absent




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, (ii) The onion cells in the image are all epidermis cells.

What is the term for a collection of cells of the same type?




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(1)

A organ

B organism

C system

D tissue


(b) The images show samples of red onion epidermis cells before and after being
placed into a 5% sucrose solution for one hour.




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(Source: © J.C. REVY, ISM / SCIENCE PHOTO LIBRARY)

Before




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(Source: © J.C. REVY, ISM / SCIENCE PHOTO LIBRARY)

After




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