Exam (elaborations)
EDEXCEL A LEVEL BIOLOGY B 2022 QUESTION PAPER 2
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EDEXCEL A LEVEL BIOLOGY B 2022 QUESTION PAPER 2
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Edexcel A Level 2022 papers andmarkschemes
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, Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Time 1 hour 45 minutes
Paper
reference 9BI0/02
Biology B
Advanced
PAPER 2: Advanced Physiology, Evolution and Ecology
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball-point pen.
• centrethe
Fill in boxes at the top of this page with your name,
number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
• You may use a scientific calculator.
Information
• The total mark for this paper is 90.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Into question(s) marked with an asterisk (*), marks will be awarded for your ability
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.
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*P67088A0136*
P67088A
©2022 Pearson Education Ltd.
1/1/1/1/1/
, Answer ALL questions. Write your answers in the spaces provided.
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 The diagram shows DNA replication.
X
(a) Which of the following is the name of the bond labelled X on the diagram?
(1)
A ester
B glycosidic
C hydrogen
D phosphodiester
(b) Describe the roles of three named enzymes involved in DNA replication.
(3)
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2
*P67088A0236*
, (c) A section of double-stranded DNA has a total number of 10 000 nucleotides.
Adenine makes up 35% of the nucleotides in this section of
double‑stranded DNA.
Calculate the total number of cytosine nucleotides found in this section of DNA.
(2)
Answer ........................................ . . . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 6 marks)
3
*P67088A0336* Turn over
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