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Mark scheme June 2021 Version: 1.0 Final Mark SchemeMark scheme June 2021 Version: 1.0 Final Mark Scheme

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Question Answers Extra information Mark AO / Spec. Ref. 01.1 chromosome(s) allow chromatid(s) / gene(s) / allele(s) 1 AO1 4.6.1.4 01.2 sugar allow deoxyribose allow pentose do not accept ribose 1 AO1 4.6.1.5 01.3 base(s) allow nitrogenous base(s) allow adenine and cytosine and guanine and thymine 1 AO1 4.6.1.5 01.4 all four required for the mark 1 AO3 4.6.1.5MARK SCHEME – GCSE BIOLOGY – 8461/2H – JUNE 2021 8 Question Answers Extra information Mark AO / Spec. Ref. 01.5 replication 1 AO3 4.6.1.5 4.1.2.2 01.6 protein allow polypeptide 1 AO1 4.6.1.4 01.7 3 × 10 −12 grams 1 AO2 4.6.1.2 01.8 meiosis 1 AO1 4.6.1.2 Total 8MARK SCHEME – GCSE BIOLOGY – 8461/2H – JUNE 2021 9 Question Answers Extra information Mark AO / Spec. Ref. 02.1 (put beaker in a) water bath allow (put beaker in an) incubator 1 AO1 4.7.2.3 RPA10 02.2 volume of the milk or type of milk allow amount of milk allow named type of milk, eg cows’ or semi-skimmed 1 AO1 4.7.2.3 RPA10 02.3 correct scale and axis labelled all points plotted correctly suitable curved line of best fit scale must be at least 1 cm for 1 day allow a tolerance of ± ½ small square allow 4 or 5 correct plots for 1 mark ignore line joined point to point with straight lines 1 2 1 AO2 4.7.2.3 RPA10 02.4 similar shaped line drawn to left of 20°C line on Figure 4 same start pH allow a tolerance of ± ½ small square allow from student’s line of best fit or student’s plot for 0 days 1 1 AO2 4.7.2.3 RPA10 Total 8MARK SCHEME – GCSE BIOLOGY – 8461/2H – JUNE 2021 10 Question Answers Extra information Mark AO / Spec. Ref. 3.1 any one from: • movement would release (extra) heat • movement would increase body temperature • movement would increase sweating 1 AO2 4.5.1 4.5.2.4 3.2 37.4°C 1 AO2 4.5.1 4.5.2.4 3.3 blood is cooled at stomach / mouth (cooled) blood flows to the brain 1 1 AO2 4.5.1 4.5.2.4

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GCSE
BIOLOGY
8461/2H
Paper 2 Higher Tier
Mark scheme
June 2021
Version: 1.0 Final Mark Scheme




*jun2184612H/MS*

, MARK SCHEME – GCSE BIOLOGY – 8461/2H – JUNE 2021



Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant
questions, by a panel of subject teachers. This mark scheme includes any amendments made at the
standardisation events which all associates participate in and is the scheme which was used by them in
this examination. The standardisation process ensures that the mark scheme covers the students’
responses to questions and that every associate understands and applies it in the same correct way.
As preparation for standardisation each associate analyses a number of students’ scripts. Alternative
answers not already covered by the mark scheme are discussed and legislated for. If, after the
standardisation process, associates encounter unusual answers which have not been raised they are
required to refer these to the Lead Examiner.

It must be stressed that a mark scheme is a working document, in many cases further developed and
expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
assessment remain constant, details will change, depending on the content of a particular examination
paper.


Further copies of this mark scheme are available from aqa.org.uk




Copyright information

AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this booklet for their own internal
use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any material that is acknowledged to a third party even for
internal use within the centre.

Copyright © 2021 AQA and its licensors. All rights reserved.


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, MARK SCHEME – GCSE BIOLOGY – 8461/2H – JUNE 2021



Information to Examiners


1. General
The mark scheme for each question shows:
• the marks available for each part of the question
• 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
• the Assessment Objectives, level of demand and specification content that each question is intended
to cover.


The extra information 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 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 and underlining
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.

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

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

2.4 Any wording that is underlined is essential for the marking point to be awarded.




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