Pearson Edexcel International Advanced Level Biology International
Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity
QP MAY 2024
user [Date] [Course title]
, 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
reference WBI14/01
Morning (Time: 1 hour 45 minutes) Paper
Biology
International Advanced Level
UNIT 4: Energy, Environment, Microbiology
and Immunity
You must have: Total Marks
Scientific calculator, ruler, HB pencil
Pearson Edexcel International Advanced Level Biology International Advanced
Level UNIT 4: Energy, Environment, Microbiology and Immunity QP MAY
2024
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.
In questions 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.
Turn over
P75774A
©2024 Pearson Education Ltd.
*P75774A0132*
,F: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
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
DO NOT WRITE IN THIS AREA
seaweed, 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
brown red spinach
seaweed seaweed
Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity
QP MAY 2024
user [Date] [Course title]
, 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
reference WBI14/01
Morning (Time: 1 hour 45 minutes) Paper
Biology
International Advanced Level
UNIT 4: Energy, Environment, Microbiology
and Immunity
You must have: Total Marks
Scientific calculator, ruler, HB pencil
Pearson Edexcel International Advanced Level Biology International Advanced
Level UNIT 4: Energy, Environment, Microbiology and Immunity QP MAY
2024
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.
In questions 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.
Turn over
P75774A
©2024 Pearson Education Ltd.
*P75774A0132*
,F: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
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
DO NOT WRITE IN THIS AREA
seaweed, 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
brown red spinach
seaweed seaweed
