Geschreven door studenten die geslaagd zijn Direct beschikbaar na je betaling Online lezen of als PDF Verkeerd document? Gratis ruilen 4,6 TrustPilot
logo-home
Tentamen (uitwerkingen)

GCSE BIOLOGY 8461/1H Paper 1H Mark scheme Specimen (set 2) Version: 1.0

Beoordeling
-
Verkocht
-
Pagina's
22
Cijfer
A+
Geüpload op
31-05-2022
Geschreven in
2020/2021

Question Answers Extra information Mark AO / Spec. Ref. / Demand 01.1 C6H12O6 1 AO1.1 4.4.2.1 Standard 01.2 atmospheric air contains less carbon dioxide than exhaled air (flask B goes more cloudy because) carbon dioxide is produced in (aerobic) respiration (by woodlice) allow converse do not accept anaerobic respiration 1 1 AO2.2 4.4.2.1 Standard 01.3 for comparison / to compare or to check that no other factor / variable is influencing the results allow answers in the context of the investigation eg to prove that the results obtained were due to the woodlice respiring and nothing else or to prove that the woodlice produced the carbon dioxide and nothing else 1 AO2.2 4.4.2.1 Standard 01.4 (flask A) would remain colourless (flask B) would remain colourless ignore references to clear allow not cloudy 1 1 AO3.2b 4.4.2.1 Standard 01.5 lactic acid 1 AO1.1i 4.4.2.1 Standard 01.6 alcohol / ethanol 1 AO1.1i 4.4.2.1 Standard Total 8MARK SCHEME – GCSE BIOLOGY – 8461/1H – SPECIMEN (SET 2) 8 Question Answers Extra information Mark AO / Spec. Ref. / Demand 02.1 electron (microscope) 1 AO2.2 4.1.1.5 Standard 02.2 30 000 200 150 (µm) an answer of 150 (µm) scores 2 marks if answer is incorrect allow for 1 mark sight of 0.015 / 0.15 / 1.5 / 15 allow ecf for incorrect measurement of line X for max 1 mark 1 1 AO2.2 4.1.1.5 Standard 02.3 either large surface area for more / faster osmosis or allow thin (cell) walls for short(er) diffusion distance allow (vacuole contains) cell sap that is more concentrated than soil water (1) create / maintain concentration / water potential gradient (1) 1 1 AO1.1 4.1.1.3 4.2.3.2 Standard 02.4 (on hot day) more water lost more transpiration or more evaporation so more water taken up (by roots) to replace (water) loss (from leaves) allow converse for a cold day 1 1 1 AO2.1 4.2.3.2 StandardMARK SCHEME – GCSE BIOLOGY – 8461/1H – SPECIMEN (SET 2) 9 02.5 (aerobic) respiration occurs in mitochondria (mitochondria / respiration) release energy (energy used for) active transport to transport ions, against the concentration gradient or from a low concentration to a high concentration do not accept anaerobic respiration do not accept energy produced / made / created 1 1 1 1 AO2.1 4.1.3.3 4.4.2.1 Standard Total 12MARK SCHEME – GCSE BIOLOGY – 8461/1H – SPECIMEN (SET 2) 10 Question Answers Extra information Mark AO / Spec. Ref. / Demand 03.1 a fungus 1 AO1.1i 4.3.3.1 4.3.1.4 Standard 03.2 Level 3: Relevant points (reasons / causes) are identified, given in detail and logically linked to form a clear account. 5-6 AO1.1 4.3.1.6 4.3.3.2 Level 2: Relevant points (reasons / causes) are identified, and Standard there are attempts at logically linking. The resulting account is not fully clear. 3-4 Level 1: Points are identified and stated simply, but their relevance is not clear and there is no attempt at logical linking. 1-2 No relevant content 0 Indicative content defence description of defence animals skin sebum / oils to kill microbes dead layer difficult to penetrate nose hairs keep out dust and microbes trachea / bronchi mucus traps microbes cilia moves mucus stomach (hydrochloric) acid kills bacteria white blood cells produce antibodies produce antitoxins

Meer zien Lees minder
Instelling
Vak

Voorbeeld van de inhoud

GCSE
BIOLOGY
8461/1H
Paper 1H


Mark scheme
Specimen (set 2)

Version: 1.0




Keep secure
Please be aware that not all schools and colleges will be using these tests at
the same time.
Help us to maintain the security of these papers by ensuring they are not
distributed on social media or other platforms.

, MARK SCHEME – GCSE BIOLOGY – 8461/1H – SPECIMEN (SET 2)




Important – please note
Mark schemes are prepared by the Lead Assessment Writer and considered,
together with the relevant questions, by a panel of subject teachers.

It must be stressed that a mark scheme is a working document. This mark
scheme has not been through the full standardisation process. 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.

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.


The Information to Examiners is included as a guide to how the mark scheme
will function as an operational document.

The layout has been kept consistent so that future operational mark schemes
do not appear different from these test materials.

If the printing process in your school alters the scale of a diagram, measure
the values on your printed papers and mark the scripts accordingly.




Copyright © 2017 AQA and its licensors. All rights reserved.
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.




2

, MARK SCHEME – GCSE BIOLOGY – 8461/1H – SPECIMEN (SET 2)



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.




3

Geschreven voor

Vak

Documentinformatie

Geüpload op
31 mei 2022
Aantal pagina's
22
Geschreven in
2020/2021
Type
Tentamen (uitwerkingen)
Bevat
Vragen en antwoorden

Onderwerpen

$8.99
Krijg toegang tot het volledige document:

Verkeerd document? Gratis ruilen Binnen 14 dagen na aankoop en voor het downloaden kun je een ander document kiezen. Je kunt het bedrag gewoon opnieuw besteden.
Geschreven door studenten die geslaagd zijn
Direct beschikbaar na je betaling
Online lezen of als PDF


Ook beschikbaar in voordeelbundel

Maak kennis met de verkoper

Seller avatar
De reputatie van een verkoper is gebaseerd op het aantal documenten dat iemand tegen betaling verkocht heeft en de beoordelingen die voor die items ontvangen zijn. Er zijn drie niveau’s te onderscheiden: brons, zilver en goud. Hoe beter de reputatie, hoe meer de kwaliteit van zijn of haar werk te vertrouwen is.
Brainboost Bedfordshire University
Volgen Je moet ingelogd zijn om studenten of vakken te kunnen volgen
Verkocht
22
Lid sinds
5 jaar
Aantal volgers
15
Documenten
724
Laatst verkocht
1 week geleden

3.4

5 beoordelingen

5
2
4
0
3
1
2
2
1
0

Recent door jou bekeken

Waarom studenten kiezen voor Stuvia

Gemaakt door medestudenten, geverifieerd door reviews

Kwaliteit die je kunt vertrouwen: geschreven door studenten die slaagden en beoordeeld door anderen die dit document gebruikten.

Niet tevreden? Kies een ander document

Geen zorgen! Je kunt voor hetzelfde geld direct een ander document kiezen dat beter past bij wat je zoekt.

Betaal zoals je wilt, start meteen met leren

Geen abonnement, geen verplichtingen. Betaal zoals je gewend bent via iDeal of creditcard en download je PDF-document meteen.

Student with book image

“Gekocht, gedownload en geslaagd. Zo makkelijk kan het dus zijn.”

Alisha Student

Bezig met je bronvermelding?

Maak nauwkeurige citaten in APA, MLA en Harvard met onze gratis bronnengenerator.

Bezig met je bronvermelding?

Veelgestelde vragen