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2024 Pearson Edexcel Advanced Subsidiary GCE In Biology B (8BI0) Paper 01: Core Cellular Biology and Microbiology QUESTION PAPER AND MARKING SCHEME (MERGED)

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2024 Pearson Edexcel Advanced Subsidiary GCE In Biology B (8BI0) Paper 01: Core Cellular Biology and Microbiology QUESTION PAPER AND MARKING SCHEME (MERGED)

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Number Number




Morning (Time: 1 hour 30 minutes) Paper


B ■ ■


Advanced Subsidiary
PAPER 1: Core Cellular Biology and Microbiology




Instructions

• Use black ink or ball-point pen.
centre number and candidate number.

Answer the questions in the spaces provided –
there may be more space than you need.

Information

• The total mark for this paper is 80.
– use this as a guide as to how much time to spend on each question.
In question(s) marked with an asterisk (*), marks will be awarded for your ability to structure
your answer logically, showing how the points that you make are related or follow on from each
other where appropriate.

Advice
• Read each question carefully before you start to answer it.
• Check your answers if you have time at the end.
Turn over

, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .
1 (a) Plants take up magnesium ions and nitrate ions from the soil. These inorganic ions are
dissolved in the water in the soil.

(i) Magnesium ions and nitrate ions are incorporated into molecules made by the
plant.
Which row in the table shows the molecules that incorporate these ions?
(1)


acids chlorophyll nucleotides
A magnesium ions ions magnesium ions
B magnesium ions ions ions
C ions magnesium ions ions
D ions magnesium ions magnesium ions

(ii) Explain why these ions dissolve in water.
(2)

. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. .. .. .. ... .. .. .. ... .. .. .. ... ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................




2
■■■■

, (b) The graph shows the uptake of nitrate ions by a plant in the presence and absence
of oxygen.

60
with oxygen



50



40


Uptake of
nitrate ions
30
/ arbitrary
units without oxygen


20



10



0
0 20 40 60 80 100 120
Time / minutes

Analyse the data to describe two conclusions that can be made about the uptake of nitrate
ions by this plant.
(2)

1 . .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. .................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . . .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... . . .. .. ... .. .. .. ... .. .. .. ... . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................



2 . .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. . .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. .................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. . . .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... . .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................



. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... . . .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. ... .. .. .. . .. ......................


(Total for Question 1 = 5 marks)




3
■■■■ Turn over

, 2 Chromosome mutations include non-disjunction and translocation.

(a) The diagram shows part of a karyotype from a female with Down’s syndrome.
Complete the diagram to show the full karyotype of a female with Down’s
syndrome.
(2)




1 2 3 4 5 6



7 8 9 10 11 12



13 14 15 16 17 18


19 20 21 22 23

(b) The diagram shows two chromosomes, C1 and C2, before translocation.




C1 C2

Draw a diagram to show the appearance of these two chromosomes after translocation (1)
has occurred.




■■■■
4
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