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AQA A-Level Biology Paper 1 2024 - Mark Scheme £6.49
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AQA A-Level Biology Paper 1 2024 - Mark Scheme

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This document contains the AQA A-level Biology Paper 1, Mark Scheme (MS) for the 2024 exam series. Get yours now to aid in revision and upcoming mocks! *Question Paper (QP) for this document is also available for purchase individually or in a package deal with MS. (Watermarked document)

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  • January 30, 2025
  • 21
  • 2024/2025
  • Exam (elaborations)
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ALEVELPAPERZZ2024




A-level




24
BIOLOGY
7402/1




20
Paper 1




ZZ
Mark scheme
June 2024
Version: 1.0 Final

R
PE
A
LP
VE
LE
A

, MARK SCHEME – A-LEVEL BIOLOGY – 7402/1 – JUNE 2024



Mark scheme instructions to examiners

1. General
The mark scheme for each question shows:
• the marks available for each part of the question
•




24
the total marks available for the question
• the typical answer or answers which are expected
• extra information to help the examiner make his or her judgement and help to delineate what
is acceptable or not worthy of credit or, in discursive answers, to give an overview of the area
in which a mark or marks may be awarded.




20
The extra information in the ‘Comments’ column is aligned to the appropriate answer in the left-
hand part of the mark scheme and should only be applied to that item in the mark scheme.
At the beginning of a part of a question a reminder may be given, for example: where




ZZ
consequential marking needs to be considered in a calculation; or the answer may be on the
diagram or at a different place on the script.
In general the right-hand side of the mark scheme is there to provide those extra details which
confuse the main part of the mark scheme yet may be helpful in ensuring that marking is
straightforward and consistent.

2. Emboldening
R
PE
2.1 In a list of acceptable answers where more than one mark is available ‘any two from’ is
used, with the number of marks emboldened. Each of the following bullet points is a
potential mark.
A

2.2 A bold and is used to indicate that both parts of the answer are required to award the
mark.
LP



2.3 Alternative answers acceptable for the same mark are indicated by the use of OR.
Different terms in the mark scheme are shown by a / ; eg allow smooth / free movement.


3. Marking points
VE




3.1 Marking of lists
This applies to questions requiring a set number of responses, but for which students
have provided extra responses. The general principle to be followed in such a situation is
that ‘right + wrong = wrong’.
LE




Each error / contradiction negates each correct response. So, if the number of errors /
contradictions equals or exceeds the number of marks available for the question, no
marks can be awarded.
However, responses considered to be neutral (often prefaced by ‘Ignore’ in the
A




‘Comments’ column of the mark scheme) are not penalised.




3

, MARK SCHEME – A-LEVEL BIOLOGY – 7402/1 – JUNE 2024



3.2 Marking procedure for calculations
Full marks can be given for a correct numerical answer, without any working shown.
However, if the answer is incorrect, mark(s) can usually be gained by correct substitution /
working and this is shown in the ‘Comments’ column or by each stage of a longer
calculation.

3.3 Interpretation of ‘it’




24
Answers using the word ‘it’ should be given credit only if it is clear that the ‘it’ refers to the
correct subject.

3.4 Errors carried forward, consequential marking and arithmetic errors




20
Allowances for errors carried forward are most likely to be restricted to calculation
questions and should be shown by the abbreviation ECF or consequential in the mark
scheme.




ZZ
An arithmetic error should be penalised for one mark only unless otherwise amplified in
the mark scheme. Arithmetic errors may arise from a slip in a calculation or from an
incorrect transfer of a numerical value from data given in a question.

3.5 Phonetic spelling

R
The phonetic spelling of correct scientific terminology should be credited unless there is a
possible confusion with another technical term.
PE
3.6 Brackets
(…..) are used to indicate information which is not essential for the mark to be awarded
but is included to help the examiner identify the sense of the answer required.

3.7 Ignore / Insufficient / Do not allow
A

Ignore or insufficient is used when the information given is irrelevant to the question or not
enough to gain the marking point. Any further correct amplification could gain the marking
LP



point.
Do not allow means that this is a wrong answer which, even if the correct answer is
given, will still mean that the mark is not awarded.
VE
LE
A




4

, MARK SCHEME – A-LEVEL BIOLOGY – 7402/1 – JUNE 2024




Marking Guidance Mark Comments
Question

1. Circle(s)/shape(s) drawn around H in one of the 1. Accept
HO groups of the glycerol and the OH group of circle(s)/shape(s)
the fatty acid; 3 drawn around the OH




24
01.1 (3 x group of one molecule
2. Ester (bond);
AO1) and the H of an OH
3. Condensation (reaction); group of the other
molecule




20
Question Marking Guidance Mark Comments

Stearic (acid); 1




ZZ
01.2 (1 x
AO1)

Question Marking Guidance Mark Comments


R
As (number of C) double bonds increases, melting Accept converse
PE
point decreases
Accept C=C for
OR 1 double bonds
01.3 (1 x
As unsaturation increases, melting point decreases Accept as (number of)
AO2) hydrogen/H (atoms)
OR
increases, melting
A

As saturation increases, melting point increases; point increases
LP



Question Marking Guidance Mark Comments

1. More unsaturated fatty acids increases fluidity (in Accept for 2 marks,
(cell-surface membrane); more unsaturated
fatty acids increases
VE




2. (Making cell-surface) membrane more fluid/
3 membrane fluidity
flexible;
01.4 (3 x 3. Accept endocytosis
3. Easy to engulf; for engulf
AO2)
3. Accept more/easier
LE




for phagosomes to
form
A




5

, MARK SCHEME – A-LEVEL BIOLOGY – 7402/1 – JUNE 2024



Question Marking Guidance Mark Comments

1. (Movement of) polar/charged molecules; 1. Accept ions OR
non-lipid soluble for
2. (Facilitated diffusion) movement down a
polar
concentration gradient via carrier/channel
protein; 1. Accept named




24
polar molecule, eg
3. (Active transport) movement against a
glucose OR amino
concentration gradient via carrier protein using
acids OR nucleotides
ATP;
3 2. Reject if ATP used




20
02.1 (3 x 2. Ignore along OR
AO1) with for down
2. Ignore diffusion




ZZ
gradient
3. Reject channel
protein




R
PE
Question Marking Guidance Mark Comments

(Highly) folded cell(-surface) membrane; Accept invaginated
1 OR projections OR
extensions for folded
A

02.2 (1 x
AO1) Reject hairs
Ignore brush border
LP



Question Marking Guidance Mark Comments

1. Combine/mix/join with bile salts; Max 2 if context is
VE




related to digestion of
2. Make (more) soluble (in water);
vitamin A to
3. (Micelles) breakdown close to cells phospholipids OR
monoglycerides OR
OR fatty acids
LE




Maintain high(er) concentration at 3 max Ignore emulsification
02.3 cell(-surface membrane) of vitamin A
(3 x
OR AO2) 3. Accept ‘fuse with’
Transport to cells/lining; for ‘breakdown close
A




to’
4. Diffuses (into cells/ileum); 4. Ignore facilitated
4. Ignore micelles are
absorbed



6

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