GCSE BIOLOGY 8461/1F Paper 1 Foundation Tier. Mark scheme June 2021 Version: 1.0 Final Mark Scheme

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Question Answers Extra information Mark AO / Spec. Ref. 01.1 1 AO3 4.1.3.1 01.2 water mineral ions energy in this order only allow minerals / ions 1 1 1 AO1 4.1.3.2 4.1.3.3 4.2.3.2 01.3... root hair (cell) ignore root / hair unqualified 1 AO1 4.1.1.3 4.2.3.2 01.4 large surface / area allow it has a long projection allow the walls are thin allow it has lots of mitochondria 1 AO1 4.1.1.3 4.2.3.2 01.5 do not accept more than one line from a box on the left 1 1 AO1 4.1.1.3MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 8 01.6 nerve (cell) any one from: • long • has branches • has insulation allow neuron(e) ignore motor / sensory / relay allow myelin / fat 1 1 AO1 4.1.1.3 Total 10MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 9 Question Answers Extra information Mark AO / Spec. Ref. 02.1 pathogens 1 AO1 4.3.1.1 02.2 viruses reproduce inside cells, damaging them 1 AO1 4.3.1.1 02.3 any one from: • they do not have a cell membrane • they do not have cytoplasm • they do not have a nucleus • they do not have mitochondria (like most eukaryotic cells) • they do not have ribosomes do not accept they do not have a cell wall do not accept they do not have chloroplasts / chlorophyll ignore they are not living / alive ignore they can only replicate inside cells ignore virus has a protein coat 1 AO2 4.1.1.2 02.4 a weakened form of a virus 1 AO1 4.3.1.7 02.5 1 AO2 4.3.1.7 02.6 leaf 1 AO1 4.3.1.2MARK SCHEME – GCSE BIOLOGY – 8461/1F – JUNE 2021 10 02.7 y-axis labelled rate of photosynthesis in arbitrary units correct scale all bars plotted correctly all bars correctly labelled allow a tolerance of ± ½ small square allow 2 correct bars for 1 mark allow bars touching allow any width of bars ignore letters 1 1 2 1 AO2 4.4.1.1 02.8 as the level of infection (with TMV) increases, (the rate of) photosynthesis decreases allow as TMV increases, photosynthesis decreases allow (the rate of) photosynthesis decreases as the level of infection (with TMV) increases allow as infection gets worse, photosynthesis decreases allow TMV reduces photosynthesis 1 AO3 4.4.1.1 02.9 less chlorophyll (so) less glucose / starch / protein made allow fewer chloroplasts allow less light absorbed ignore less photosynthesis 1 1 AO2 4.4.1.1 4.4.1.3 4.3.1. [Show More]

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