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Pearson Edexcel International Advanced Level International Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity Question Paper May 2024 $12.99
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Pearson Edexcel International Advanced Level International Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity Question Paper May 2024
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Course
Pearson Edexcel International Advanced Level
Institution
Pearson Edexcel International Advanced Level
Pearson Edexcel International Advanced Level International Advanced Level UNIT 4: Energy, Environment,
Microbiology and Immunity Question Paper May 2024
Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Tuesday 28 May 2024
Morning (Time: 1 hour 45 minutes) Paper
reference WBI14/01
Biology ■ ■
International Advanced Level
UNIT 4: Energy, Environment, Microbiology
and Immunity
You must have: Total Marks
Scientific calculator, ruler, HB pencil
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 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.
• Instructure
questions marked with an asterisk (*), marks will be awarded for your ability to
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.
• your answers if you have time at the end.
Check
Pearson Edexcel International Advanced Level International Advanced Level UNIT 4: Energy, Environment,
Microbiology and Immunity Question Paper May 2024 Turn over
, 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
DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 Seaweeds are photosynthetic organisms. They contain chloroplast pigments, some of
which are similar to land plants and some of which are different.
(a) Which process can be used to separate chloroplast pigments according to
their solubility?
(1)
A chromatography
B dendrochronology
C gel electrophoresis
D polymerase chain reaction
(b) A student separated the chloroplast pigments found in brown seaweed,
DO NOT WRITE IN THIS AREA
red seaweed and spinach using this method.
The diagram shows the results.
solvent front
β-carotene
chlorophyll a
chlorophyll b
pigment P
xanthophylls
pigment Q
origin
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brown red spinach
seaweed seaweed
2
■■■■
, (i) Compare and contrast the types of chloroplast pigment found in the
seaweeds with those found in the spinach.
Use the information in the diagram to support your answer.
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, (c) The diagram shows the position of three different types of seaweed on rock
covered in water.
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The diagram also shows the depth to which red light, green light and blue light
penetrate into the water.
red green blue
light light light
water level
green seaweed
brown seaweed
red seaweed
submerged rock
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(i) Which row of the table shows the light that green seaweed can absorb?
(1)
Green light Red light
A can absorb can absorb
B can absorb cannot absorb
C cannot absorb can absorb
D cannot absorb cannot absorb
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4
■■■■
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