Download Answers and commentary (A-level) : Paper 3 essay and more Schemes and Mind Maps Biology in PDF only on Docsity! AQA=
Realising potential
Specimen answer 1
June 14 BIOL5 10b
Non-confidential
10 Write an essay on one of the following topics.
EITHER
10 {a} How calls and organisms carry out exchanges with their external environment to
maintain their internal environment.
[25 marks]
OR
410 (b) How energy is transferred within and between organisms.
[25 marks]
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10 {b)
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EITHER | {¥ ros y8)
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Hew calls and organisms carry out exchanges with their external environment to
maintain their internal environment,
[25 marie} |
OR |
How energy ia transferrad within and between organisms.
[25 marks]
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Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 2 0 H – Concept only. 2 10 2 0 Re-stating title only. 3 10 2 0 C – Some knowledge but very low level and not addressing title. Not quite enough detail. 4 10 2 0 Significant error. Sodium – not ions. Channels let sodium ions in but they are actively transported out. 5 10 3 0 Lungs mentioned. Not enough to credit L yet. 6 10 3 0 No mention of water potential. Water concentration is poor terminology. 7 10 3 0 Cholera = D. Very little detail so not enough. 8 10 3 0 Chloride ions released but no indication of where to. 9 10 3 0 Reference to Nerves = N. 10 10 4 0 Entire paragraph about photosynthesis is irrelevant. 11 10 4 0 G – But superficial. 12 10 4 0 W – Passage of water through a plant. Mention only, very superficial. 13 10 5 0 Continuation of W but no additional relevant detail. 14 10 5 0 Continuation of W but no additional relevant detail. Combined with earlier G now just about A-level content. 15 10 5 0 G – Superficial. 16 10 6 0 L – Mention only not enough. 17 10 6 0 Could be irrelevant but candidate is trying to link to title so ignore. 18 10 6 0 T – A bit superficial but just enough. 19 10 7 15 A-level content in some topics but no real attempt to relate to theme. Lacking detail in some topics. One irrelevant topic area. Multistructural - awarded 15 marks.
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0 1 2 Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 1 0 Plan viewed, no creditable material. 2 10 2 0 Introduction. Do not view as irrelevant material. 3 10 2 0 P - Idea of light energy to chemical energy. 4 10 2 0 P - Correct reference to photolysis and using energy from ATP and reduced NADP to form glucose in light-independent reaction. 5 10 3 0 Et - Correct references to loss of energy between trophic levels and the different ways in which this occurs. 6 10 4 0 Irrelevant material about nutrient cycles. 7 10 4 0 Sr - Pacinian corpuscle converting mechanical energy into electrical energy. 8 10 5 0 Sr - Correct reference to the functioning of light receptors transferring light energy into electrical energy. 9 10 6 0 Correct material about chemical energy from ATP being converted into movement energy and used in active transport. The error in referring to both the stroma and the cristae as the site of ATP production is not a significant error so does not negate. 10 10 6 0 Mc - Noted as a topic however insufficient material. 11 10 6 0 D - Glucose produced as a result of digestion can then be converted into other energy forms eg heat to maintain body temp. 12 10 7 0 Following theme using examples (holistic) - directly addressing theme. One irrelevant passage but, on balance, offset by content. Nothing detailed beyond specification. Extended abstract - awarded 22 marks. AQA=
Realising potential
Specimen answer 4
June 14 BIOL5S 10a
Non-confidential
24
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0 8 0 9 0 1 0 1 1 1 1 Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 1 0 Pan noted. 2 10 2 0 Homeostasis topic noted, no detail. 3 10 2 0 T - Temperature topic noted, heat loss via sweating but no mention of heat energy being required for evaporation. Possible significant error – capillaries do not control blood flow to skin. 4 10 2 0 Respiration irrelevant. 5 10 3 0 G - Gas exchange noted. 6 10 3 0 Photosynthesis is irrelevant. 7 10 3 0 G - Gas exchange again, still not enough detail. 8 10 4 0 Tf - Tissue fluid topic noted and some weak A-level content. 9 10 4 0 D – Digestion topic noted but no detail. 10 10 4 0 B - Control of blood glucose concentration topic noted, insufficient detail. 11 10 4 11 Some superficial A-level content. Irrelevant topics. Does try to deal with number of topics - so elements of multistructural. Borderline between unistructural and multistructural - awarded 11 marks. 0 1 0 2 0 3 0 4 0 5
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0 8 0 9 0 1 0 0 1 1 AQA=
Realising potential
Specimen answer 6
June 14 BIOL5 10b
Non-confidential
Et Write an essay on one of the following topics.
EITHER
10 (a) How cells and organisms carry out exchanges with their external environment to
maintain their internal environment. —-- aes
Rommasa> pet [25 marks] |
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0 9 1 2 1 0 Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 2 0 Idea of energy transfer through ecosystems just about enough, but would look for more detail. 2 10 3 0 Idea of carbon cycle and fossil fuels here considered relevant. 3 10 3 0 Use of ATP in energy transfer just about enough. 4 10 3 0 Idea of respiration energy transfer just about enough. 5 10 3 0 Significant error – idea that ATP is transferred around the body. 6 10 3 0 Idea of energy transfer light to chemical in Photosynthesis. 7 10 4 0 Idea of mechanical energy transferred to chemical energy noted under stimulus response for breadth, but not enough detail. 8 10 4 0 Significant error again energy transferred into cells as ATP. 9 10 5 0 Nothing irrelevant in this section, but nothing to credit either. 10 10 5 12 A-level detail and mostly suitable topics. However, significant errors and one irrelevant passage. Multistructural - awarded 12 marks. AQA=
Realising potential
Specimen answer 7
June 14 BIOL5S 10a
Non-confidential
24
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Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 2 0 T – Temperature control. A-level detail but not enough explanation of how evaporation reduces blood temperature. 2 10 3 0 Relevant but not A-level detail. 3 10 3 0 W – Passage of water through plant. Ignore dead and hollow centre of the tree as this probably refers to xylem. Not enough detail. 4 10 3 0 L – lung function – No A-level detail here. 5 10 4 0 This is irrelevant. Goes too far beyond the scope of the title. 6 10 4 0 Nc – Nutrient cycles – Relevant selection but not enough detail. 7 10 4 9 Some A-level material but only in one/maybe two topics and a lot that is superficial. Some irrelevant material. Unistructural - awarded 9 marks.
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0 8 0 9 0 1 0 1 8 1 1 4a Write an essay on one of the following topics.
ETHER
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40 (a) | He a ad a organisms carry out exchanges with thelr external environment to’
their internal envirenment=--— —~
™ [2s marks]
OR
16 (b) How energy ts transferred within and between organisms. :
[25 marks]
If you want to make a plan write it here. :
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Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 1 0 Plan noted. 2 10 2 0 H - Homeostasis noted but no detail. 3 10 2 0 W - Passage of water through a plant noted and transpiration idea. 4 10 3 0 C – Cells noted, idea of turgidity. 5 10 3 0 Respiration irrelevant. 6 10 3 0 G – Gas exchange noted but not enough detail. 7 10 4 0 D – Digestion noted and idea of glucose release from food to be absorbed. 8 10 4 0 T – Temperature control noted and detail on temperature regulation. Section above about enzymes not creditworthy, but not regarded as irrelevant as it is linked to the following passage. 9 10 5 0 C- Cells noted, but no detail given (could also be credited under Tf – tissue fluid). 10 10 5 0 Respiration irrelevant. 11 10 5 14 A-level detail in some topics but not really addressing the theme of the essay, or interrelated. One irrelevant topic area but no significant errors. Multistructural - awarded 14 marks. AQA=
Realising potential
Specimen answer 10
June 14 BIOL5S 10a
Non-confidential
. 10 Write an essay on one of the followlng topics. EITHER 10 (a) How cells and organisms carry out exchanges with their external environment to maintain their internal environment. [25 mart{a) OR , 10 (b) How energy is transferred within and between organisms. [25 mart{s] If you want to make a plan write it here . .. .. �P ... , .:::-:. ..................... ::::::: ........................ , .. . ... .. . ... . .. ...... .... ... ...... .. . ... . .. . . . . .. ... ... .. . . . .. . = ....... ·........ ?. . .. �J.:CZ'� ............................................................................................... . ............... ? .... f..��� ..... �5.-:'.'.��---·················································· ........................ ! ........... � ..... f .'? '--1:,,_7· ......................................................................... ............... I ._-"., 1,W.tl � ... .............. -.,, ................... - ......................................................................... ,, .................... ,,, ..•. I ............................................................................................................................................ �� ............................................................................................................................................ ............................................................................................................................................. L-.. 1 111 2 Z WMPIJun1,tlBIOLl5 0 4 0 5 1 5 6 Senior examiner annotations # Item Page Mark/ symbol Annotation 1 10 2 0 2 10 2 0 L – Lung function but there is limited A-level detail of pressure changes. 3 10 2 0 G – Gas exchange. Includes detailed explanation of fish, insect and plant gas exchange. 4 10 4 0 W – Passage of water through plant. Good detail of absorption of water by osmosis into root hair cells. 5 10 4 0 C - Cells. Relevant selection but not enough detail for further credit. 6 10 4 15 A bit limited in scope with 4 topics but A-level content - if often limited in detail. Not really interrelated, or addressing the theme of the essay in a coherent fashion. Multistructural - awarded 15 marks.