Write your name here
Surname Other names
Centre Number Candidate Number
Pearson Edexcel
Level 3 GCE
Biology B
Advanced
Paper 1: Advanced Biochemistry,
Microbiology and Genetics
Monday 12 June 2017 – Afternoon Paper Reference
Time: 1 hour 45 minutes 9BI0/01
You must have: Total Marks
Calculator, HB pencil, ruler
Instructions
• Use black ink or ball-point pen.
• centre
Fill in the boxes at the top of this page with your name,
number and candidate number.
• Show yourall questions.
Answer
• answer whereworking in any calculation questions and include units in your
appropriate.
• Answer the questions in the spaces provided
– there may be more space than you need.
• InYouquestions
may use a scientific calculator.
• to structure your
marked with an asterisk (*), marks will be awarded for your ability
answer logically showing how the points that you make are
related or follow on from each other where appropriate.
Information
• The
The total mark for this paper is 90.
• – usemarks for each question are shown in brackets
this as a guide as to how much time to spend on each question.
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
Turn over
P52212A
©2017 Pearson Education Ltd.
2/2/1/1/1/1/
*P52212A0128*
4 Triglycerides, amylose and glycogen are used to store energy in many living
organisms.
DO NOT WRITE IN THIS AREA
(a) Triglycerides contain fatty acids. Fatty acids are classified as saturated or
unsaturated.
The formula for a saturated fatty acid is CnH2nO2
The formula for an unsaturated fatty acid, with one double bond, is CnH(2n–2)O2
The table below shows the melting points of some common fatty acids.
Fatty acid Formula of fatty acid Melting point / °C
P C16H30O2 –11.0
Q C18H34O2 13.4
R C20H40O2 76.5
S C24H48O2 86.0
DO NOT WRITE IN THIS AREA
For each of the statements below, put a cross in the box that corresponds to
the correct statement.
(i) The saturated fatty acid(s) in the table
(1)
A are P and Q
B are R and S
C is P only
D is Q only
(ii) The fatty acid(s) liquid at 5 °C
(1) DO NOT WRITE IN THIS AREA
A are P and R
B are Q and S
C is P only
D is Q only
10
*P46640A01028*
(b) Use a labelled diagram to show how a triglyceride is formed.
(3)
DO NOT WRITE IN THIS AREA
(c) Amylose and glycogen are polysaccharides.
(i) Name the type of chemical reaction that joins monosaccharides together to
DO NOT WRITE IN THIS AREA
form an amylose molecule.
(1)
. . . . . . . . . . . ..................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ............... . . . . . . . . . . . . . . . . . . . . .
(ii) Name the chemical bond that is formed between the monosaccharides in an
amylose molecule.
(1)
. . . . . . . . . . . ..................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ............... . . . . . . . . . . . . . . . . . . . . .
(iii) Describe one structural difference between amylose and glycogen.
(1)
. . . . . . . . . . . ..................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ............... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ..................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ............... . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
. . . . . . . . . . . ..................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ............... . . . . . . . . . . . . . . . . . . . . .
11
*P46640A01128* Turn over
(iv) Explain two ways in which the structures of amylose and glycogen make them
suitable for energy storage.
(2)
DO NOT WRITE IN THIS AREA
1. . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................... ................................................................................................................. ............... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
2. . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................... ................................................................................................................. ............... . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . ...................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................................................................................................................................... . . . . . . . . . . . . . . . . . . . . .
DO NOT WRITE IN THIS AREA
(Total for Question 4 = 10 marks)
DO NOT WRITE IN THIS AREA
12
*P46640A01228*
Q.3
2
8
9
10
15
Q.9.
16
17
Q.10.
18
19
Q.19.
31
Q.20.
32
Q.23.
39
Q.27.
41
42
Q.28.
Q.29.
43
44
