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Edexcel as level biology question paper 1 ju ne 2023 + mark scheme

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Edexcel as level biology

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Edexcel As Level Biology

Mark Scheme (Results) Summer 2023 Pearson Edexcel GCE In Biology B (8BI0) Paper 01: Core Cellular Biology and MicrobiologyEdexcel and BTEC Qualifications Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We provide a wide range of qualifications includin...

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edexcel as level biology question paper 1 ju ne 20

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Grado Edexcel as level biology

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Edexcel as level biology question paper 1 ju
ne 2023 + mark scheme *P71924A0128*
Turn over P71924A
©2023 Pearson Education Ltd.
N:1/1/1/1/1/1/Please check the examination details below before entering your candidate information Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Monday 15 May 2023
Morning (Time: 1 hour 30 minutes)8BI0/01Paperreference Total Marks Biology B
Advanced Subsidiary
PAPER 1: Core Cellular Biology and Microbiology
You must have:Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball-point pen.• Fill in the boxes at the top of this page with your name, centre number and candidate number.• Answer all questions.• Answer the questions in the spaces provided – there may be more space than you need .
Information
• The total mark for this paper is 80.• The marks for each question are shown in brackets – 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.• Try to answer every question.• Check your answers if you have time at the end. *P71924A0228*
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
2
  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 Do
wn’s syndrome is a genetic condition. (a) Which r
ow in the table describes the cause of Down’s syndrome?
(1) A B C D Type of mutation Result of non‑disjunction
chromosome monosomy
chromosome polysomy
gene monosomy
gene polysomy (b) The g
raph shows the effect of the age of the mother and the order in which babies are born in a family (birth order) on the incidence of Down’s syndrome.
1 2 3 4 51000
800
600400200
040+
35–39
30–34
25–29
20–24
<20
Birth orderIncidence of Down’s syndrome per 100 000 live bir
thsAge group of mother *P71924A0328* Turn over 3
  DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA Determine the effects of birth order and age of the mother on the incidence of D
own’s syndrome.
(3)
....................................................................................................................................................................................................................................................................................
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
(Total for Question 1 = 4 marks)

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