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Pearson Edexcel International Advanced Level Advanced Subsidiary UNIT 1: Molecules, Diet, Transport and Health January 2024 Question Paper $12.99   Add to cart
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Pearson Edexcel International Advanced Level Advanced Subsidiary UNIT 1: Molecules, Diet, Transport and Health January 2024 Question Paper
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Pearson Edexcel International Advanced Level Advanced Subsidiary UNIT 1: Molecules, Diet, Transport and Health January 2024 Question Paper

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  • September 2, 2024
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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 International Advanced Level
Monday 8 January 2024
Afternoon (Time: 1 hour 30 minutes) Paper
reference WBI11/01
Biology ⯌ ⯌


Advanced Subsidiary
UNIT 1: Molecules, Diet, Transport and Health

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.
•• Calculators may be used.
You must show all your working out with your answer clearly identified at the
end of your solution.
Information Pearson Edexcel International Advanced Level Advanced Subsidiary
UNIT 1: Molecules, Diet, Transport and Health January 2024 Question Paper

• The total mark for this paper is 80.
• – usemarks
The for each question are shown in brackets
this as a guide as to how much time to spend on each question.
• In questionsavailable
The marks for spelling, punctuation and grammar are clearly indicated.
• structure yourmarked with an asterisk (* ), marks will be awarded for your ability to
answer logically, showing how the points 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


P75589A
©2024 Pearson Education Ltd.
S:1/1/1/

, Answer ALL questions.
Write your answers in the spaces provided.




DO NOT WRITE IN THIS AREA
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 Red blood cells transport oxygen to the cells of the body.
Read through the following description of how oxygen is transported from the lungs
to respiring cells.

Complete the description by writing the most appropriate word or words on the
dotted lines.

Oxygen binds to ............................. inside red blood cells.
Oxygen binds to this molecule in the lungs where the partial pressure of

oxygen is ............................ compared with elsewhere in the body.
The oxygenated blood returns to the heart in the blood vessel called the




DO NOT WRITE IN THIS AREA
. .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. .. ... .. ... .. .. ... .. .. .. and is pumped to the body by the part

of the heart called the .. .. .. .. .. .. .. . ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .

In the tissues, the ability of this molecule to bind oxygen is affected by the
higher concentration of carbon dioxide.
This is called the .............................. effect.

(Total for Question 1 = 5 marks)




DO NOT WRITE IN THIS AREA




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, 2 The nature of the genetic code of a gene is important in determining the sequence of
amino acids in a polypeptide chain.
DO NOT WRITE IN THIS AREA




The diagrams show the genetic code for some amino acids and the sequence of
bases in part of a gene.

Genetic Amino Genetic Amino Genetic Amino Genetic Amino
code acid code acid code acid code acid
AAA CAA GAA Glutamic TAC
Lysine Glutamine Tyrosine
AAG CAG GAG acid TAT
TCA
AAC CAT GAC TCC
Asparagine Histidine Aspartate Serine
AAT CAC GAT TCG
TCT
ACA CCA GCA
ACC CCC GCC
Threonine Proline Alanine TGG Tryptophan
ACG CCG GCG
DO NOT WRITE IN THIS AREA




ACT CCT GCT


Part of a gene:

A A A G C A G C C A A G


The genetic code is described as a triplet code that is non-overlapping and
is degenerate.

Explain what each of these phrases means.
Use the information provided to illustrate your answer.

(a) Triplet code
(2)
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