Mark Scheme (Results) Summer 2013: GCE Biology Unit 1 (6BI01) Paper 01 Unit 1: Lifestyle, Transport, Genes and Health
Mark Scheme (Results) Summer 2013: GCE Biology Unit 1 (6BI01) Paper 01 Unit 1: Lifestyle, Transport, Genes and Health
Mark Scheme (Results) Summer 2013: GCE Biology Unit 1 (6BI01) Paper 01 Unit 1: Lifestyle, Transport, Genes and Health
Summer 2013
GCE Biology Unit 1 (6BI01) Paper 01
Unit 1: Lifestyle, Transport, Genes and
Health
Summer 2013
Publications Code US035465
All the material in this publication is copyright
Pearson Education Ltd 2013
Mark schemes will indicate within the table where, and which strands
of QWC, are being assessed. The strands are as follows:
i) ensure that text is legible and that spelling, punctuation and
grammar are accurate so that meaning is clear
ii) select and use a form and style of writing appropriate to purpose
and to complex subject matter
iii) organise information clearly and coherently, using specialist
vocabulary when appropriate
Question
Number
1(a)
Answer
Additional Guidance
1. platelets ;
2. thromboplastin ;
3. enzymes ;
4. prothrombin ;
5. thrombin ;
Question
Number
1(b)(i)
Answer
(5)
Additional Guidance
Mark
Question
Number
Answer
Additional Guidance
1(b)(ii)
peptide (bond) ;
Mark
(3)
Mark
(1)
Question
Number
Answer
Additional Guidance
Mark
1(b)(iii)
Question
Number
2(a)
Answer
1. triplet code / 3 bases to each code /
eq ;
Additional Guidance
(2)
Mark
(2)
Question
Number
*2(b)
QWC
Answer
Additional Guidance
1. reference to semi-conservative
replication ;
6. reference to formation of
phospho(di)ester bonds (between
adjacent mononucleotides) ;
Mark
Question
Number
Answer
3(a (i)
D;
Question
Number
Answer
3(a (ii)
B;
Question
Number
Answer
3(a)(iii)
B;
Question
Number
Answer
3(a)(iv)
A;
Mark
(1)
Mark
(1)
Mark
(1)
Mark
(1)
Question
Number
Answer
Additional Guidance
Mark
3(b)(i)
1. IGNORE same
1. (total) cholesterol levels in people with mutation are not
higher than people without mutation / eq ;
2. IGNORE same
Question
Number
Answer
Additional Guidance
3(b)(ii)
(plant) statin ;
(2)
Mark
(1)
Question
Number
3(b)(iii)
Answer
Additional Guidance
Mark
4. ACCEPT vomiting
Question
Number
4(a)
Answer
1. idea of large surface area to volume ratio or that it is
thin (body) ;
2. idea that this helps diffusion e.g. short diffusion
distance, faster diffusion ;
Question
Number
4(b)(i)
Answer
1. solubility of oxygen decreases as temperature increases
/ eq ;
2. credit correct manipulation of figures ;
Additional Guidance
Mark
(2)
Mark
(2)
Question
Number
4(b)(ii)
Answer
Additional Guidance
Mark
(3)
Question
Number
Answer
Additional Guidance
Mark
4(c)
(4)
Question
Number
Answer
Additional Guidance
Mark
5(a)(i)
1. reference to {H on the N / NH} in the reduced DCPIP ;
2. reference to more {H on the O / OH / hydroxyl} in the
reduced DCPIP ;
Question
Number
5(a)(ii)
Answer
idea that the Hs come from the vitamin C / idea that vitamin
C acts as a reducing agent ;
Additional Guidance
ACCEPT Description in terms of electrons (Vit C loses
electrons/DCPIP gains electrons)
ACCEPT vitamin C is oxidised
ACCEPT vitamin C reduces DCPIP
DCPIP is reduced alone is not enough
Mark
(1)
Question
Number
5(b)(i)
Answer
Additional Guidance
Mark
Question
Number
*5(b)(ii)
QWC
Answer
Additional Guidance
(3)
Mark
(5)
Question
Number
Answer
6(a)
1. {phosphate group / heads} are hydrophilic ;
2. Idea that heads can be attracted to water ;
Additional Guidance
Mark
Question
Number
6(c)(i)
(3)
Answer
Mark
B;
C;
A;
(3)
Answer
Additional Guidance
Mark
number of ways.
(2)
Question
Number
6(c)(ii)
Question
Number
7(a)
Answer
Additional Guidance
3. ACCEPT endo/exocytosis
Answer
Additional Guidance
Mark
(2)
Mark
(2)
Question
Number
7(b)
Question
Number
7(c)
Answer
1. in the (cell surface) membrane ;
2. of mucus-producing cells / eq ;
Answer
Additional Guidance
Mark
(2)
Mark
Question
Number
Additional Guidance
Answer
Additional Guidance
(2)
Mark
1. NOT carrier
Question
Number
7(e)
Answer
Additional Guidance
Mark
Question
Number
7(f)
Answer
Additional Guidance
(2)
Mark
1. by {enzymes / proteases} ;
2. by hydrolysis / eq ;
3. of peptide bonds ;
(2)
Question
Number
8(a)
Question
Number
8(b)(i)
Answer
Additional Guidance
Answer
Additional Guidance
Mark
(1)
Mark
IGNORE faster
ACCEPT steeper
Question
Number
Answer
Additional Guidance
(2)
Mark
8(b)(ii)
(2)
Question
Number
8(c)
Answer
Additional Guidance
Mark
Answer
(2)
Additional Guidance
Mark
(2)
Question
Number
8(e)
Answer
misreporting the amount of alcohol they
had consumed / {did not know /guessed}
the alcohol content of their drinks / used
average values for alcohol content of
drinks / {lost track of / could not
remember } how much they drank / eq ;
Additional Guidance
Mark
(1)