Higher tier tutoring for OCR Biology A (J247) and Biology B (J257), built from the board's own papers and boundaries.
Book a Free ConsultationLeading Tuition's Higher tier OCR GCSE Biology tutoring is one-to-one teaching for the papers that award grades 9 to 4, with an allowed grade 3 for students just below the 3/4 boundary. OCR runs two biology GCSEs, Gateway Biology A (J247) and Twenty First Century Biology B (J257), and each has two Higher papers of 90 marks in 1 hour 45 minutes. We begin with the course code, then teach what OCR sets only at Higher tier.
Our expert OCR GCSE Biology tutors help Higher tier students prepare for J247 and J257.
Each programme starts from the student's own course code, school scheme and mock papers, then works through the statements OCR sets only at Higher tier. Book a short call about Higher tier OCR GCSE Biology tutoring.
Book a Free Consultation Message us on WhatsAppThe two codes are separate qualifications from the same board, and a student is entered for one of them. The Higher papers differ in how content is split, in the marks given to each assessment objective and in where the long written answers sit. A tutor who prepares a J247 student with J257 material spends lesson time on the wrong paper, so the first step in our programme is to confirm the code with the school's science department before anything else is planned. The parent guide to OCR GCSE Biology explains how the two specifications relate; this page covers the Higher papers only.
| Higher tier | Biology A (J247) | Biology B (J257) |
|---|---|---|
| Higher papers | Paper 3 (J247/03) and Paper 4 (J247/04) | Breadth in biology (J257/03) and Depth in biology (J257/04) |
| Marks and time | 90 marks each, 1 hour 45 minutes, 50% of the qualification each | 90 marks each, 1 hour 45 minutes, 50% of the qualification each |
| How content is split | Paper 3 assesses topics B1 to B3 and B7. Paper 4 assesses B4 to B6 and B7, with assumed knowledge of B1 to B3, and includes synoptic assessment. | Both papers assess content from all eight chapters; the board separates them by purpose, not by topic. |
| Question styles | Section A is 15 marks of multiple choice. Section B is 75 marks of short answer, practical, maths and structured questions, including an extended six-mark Level of Response question. | OCR says extended response questions are not found on the Breadth paper. Depth has at least two extended response questions of 6 marks each, so at least 12 of its 90 marks. |
| Assessment objectives, as a share of each paper | 40% AO1, 40% AO2, 20% AO3 on each paper (20, 20 and 10 of the 50 points each paper carries) | Breadth 48% AO1, 36% AO2, 16% AO3 (24, 18 and 8 of 50). Depth 32% AO1, 44% AO2, 24% AO3 (16, 22 and 12 of 50). |
Two further points hold for both codes. OCR's tables give the same overall assessment-objective split of 40%, 40% and 20% at Foundation and at Higher, so the tier difference lies in the content and the grades available, not in how marks are spread across knowledge, application and analysis. And both specifications say at least 10% of the assessment is mathematical skills, with Higher tier maths questions at a demand not lower than Foundation tier GCSE Mathematics. OCR also states that 15% of questions assess practical skills (J257 says no less than 15%), and scientific or graphical calculators are permitted on all four components.
At 90 marks in 105 minutes, a Higher paper allows about 1.17 minutes, roughly 1 minute 10 seconds, per mark. We time every practice paper against that rate, because the six-mark answers are where it is easy to spend three minutes on a question that returns two marks elsewhere. Our sister page for the lower tier is Foundation tier OCR GCSE Biology tutoring.
OCR's Biology A specification states the rule in its own words: "Statements shown in bold type will only be tested in the Higher Tier papers. All other statements will be assessed in both Foundation and Higher Tier papers." Everything in the table below is bold in OCR's content tables, quoted by its reference. Where a Higher-only statement sits beside a statement both tiers share, we say what the Higher statement adds.
Bring the school's mock papers to a short call about Higher tier OCR GCSE Biology tutoring.
Our expert biology tutors set a first plan paper by paper, for J247 Paper 3 and Paper 4 or for J257 Breadth and Depth.
Book a Free Consultation Message us on WhatsApp| Reference | OCR's Higher-only wording | What we do with it |
|---|---|---|
| B1.2d | "recall a simple description of protein synthesis": the unzipping of the DNA molecule around the gene, copying to mRNA in the nucleus (transcription), translation of the nucleotide sequence in the cytoplasm, tRNA as the carrier of amino acids | The student retells the process from nucleus to cytoplasm, and we test it with questions that ask where each step happens, since location is what the wording fixes. |
| B1.2e | "explain simply how the structure of DNA affects the proteins made in protein synthesis": the triplet code and its use to determine amino acid order in a protein | We give a short base sequence, have the student read it in groups of three and state the effect on amino acid order, then change one base and ask again. This is the bridge to B5.1e below. |
| B1.4f | "explain the interaction of temperature, light intensity and carbon dioxide concentration in limiting the rate of photosynthesis" | Three-factor scenarios: the student names which factor is limiting at a given point and why changing another one makes no difference. OCR's maths column also lists M1c in bold on this row. |
| B3.1g | "explain some of the difficulties of investigating brain function": the difficulty in obtaining and interpreting case studies and the consideration of ethical issues | An evaluation answer built from one named difficulty, one interpretive problem with case studies and one ethical point. |
| B3.1h | "explain some of the limitations in treating damage and disease in the brain and other parts of the nervous system": limited ability to repair nervous tissue, irreversible damage to the surrounding tissues, difficulties with accessing parts of the nervous system | OCR lists the limits itself, so we teach them as the skeleton of an answer and practise attaching a specific example to each. |
| B3.2b | "explain the roles of thyroxine and adrenaline in the body", with thyroxine as an example of a negative feedback system | Thyroxine becomes our first worked negative feedback loop; the same loop shape is reused for ADH and for insulin and glucagon. |
| B3.2d | "explain the interactions of FSH, LH, oestrogen and progesterone in the control of the menstrual cycle" | The statement shared by both tiers, B3.2c, asks students to describe the role of hormones in reproduction including the control of the menstrual cycle. Higher adds how the four hormones act on each other, so we draw the cycle as a timeline of which hormone triggers which. |
| B3.2f | "explain the use of hormones in modern reproductive technologies to treat infertility" | Contraception, B3.2e, is shared by both tiers. Higher adds fertility treatment, which we teach as an application of the menstrual cycle hormones from B3.2d. |
| B3.2h | Bold only in part: "gibberellins and ethene" in the learning outcome, and "controlling germination, fruit ripening, flower opening and shedding of leaves" in the To-include cell. The words "auxins" and "controlling growth" are not bold. | Auxin and growth are taught for both tiers through B3.2g. For Higher we add a one-line job for each of gibberellins and ethene, matched to germination, fruit ripening, flower opening and leaf shedding. |
| B3.2i | "describe some of the different ways in which people use plant hormones to control plant growth": selective herbicides, root cuttings, seedless fruit (parthenocarpic fruit development), altering dormancy | A flashcard set pairing each use with the hormone effect behind it, then short application questions. |
| B3.3d | "explain how glucagon interacts with insulin to control blood sugar levels in the body" | B3.3c, how insulin controls blood sugar, is in both tiers. Higher adds the second hormone, so we draw one two-direction feedback diagram rather than two separate ones. |
| B3.3i | "describe the effect of ADH on the permeability of the kidney tubules": amount of water reabsorbed and negative feedback | A four-link chain: dehydration, more ADH, more permeable tubules, more water reabsorbed. |
| B3.3j | "explain the response of the body to different temperature and osmotic challenges": challenges to include high sweating and dehydration, excess water intake, high salt intake; responses to include mechanism of kidney function, thirst | We run each named challenge as a case: what changes, what senses it, what responds, how the loop closes. |
| B5.1e | "describe how genetic variants may influence phenotype": in coding DNA by altering the activity of a protein, including active sites of enzymes; in non-coding DNA by altering how genes are expressed, including stopping transcription of mRNA (the terms promoter and transcription factor are not required) | Two parallel routes from variant to phenotype, each tied to a protein or to expression. The note that promoter and transcription factor are not required stops students over-reading the statement. |
| B6.1d | "evaluate the evidence for the impact of environmental changes on the distribution of organisms, with reference to water and atmospheric gases" | Evaluation practice on supplied data: the student states the pattern, a limitation of the data, and what further evidence would settle it. |
| B6.2e | "describe the main steps in the process of genetic engineering": restriction enzymes, sticky ends, ligase, host bacteria and selection using antibiotic resistance markers, vectors such as plasmids | The student writes the steps in order from memory, then fills gaps in an unlabelled diagram. |
| B6.3i | "describe different ways plant diseases can be detected and identified, in the lab and in the field" | A two-column answer frame, field methods against laboratory methods. |
| B6.3m | "describe how monoclonal antibodies are produced" | Production is recalled as a sequence, which is also how mark schemes reward it. |
| B6.3n | "describe some of the ways in which monoclonal antibodies can be used": their role in detecting antigens in pregnancy testing, detection of diseases (prostate cancer) and potentially treating disease (targeting cancer cells) | Each of OCR's three named uses gets a two-sentence model answer, and students practise choosing which use a question is asking about. |
| BM1.1iii | OCR's maths table, in bold: "calculate with numbers written in standard form" (skill M1b) | Standard form is drilled with the calculator allowed in the paper, using microscope magnification and cell-size questions. |
| BM1.4v | OCR's maths table, in bold: "understand and use inverse proportion – the inverse square law and light intensity in the context of factors affecting photosynthesis" | Intensity falls as 1/d2 with distance d from the lamp. We practise the proportional reasoning without needing a memorised constant. |
Studying Biology A (J247)? Our expert Higher tier biology tutors teach the bold statements above as explained chains.
Every chain ends with a model answer the student writes unaided and we mark against OCR's wording. Book a short call about J247 Higher tier tuition.
Book a Free Consultation Message us on WhatsAppBiology B marks Higher-only material the same way. OCR's wording is "Emboldened statements will only be assessed in Higher Tier papers", and the bold sits in the assessable learning outcomes of each section, and J257 also prints some sentences of the teaching and learning narrative in bold, which are Higher-only as well. The table below lists the learning outcomes, quoted by section and outcome number. Because the two specifications are organised differently, a Higher-only point in one is not always Higher-only in the other. Plant-disease detection is the clearest example: it is bold in J247 (B6.3i) but not bold in J257 (outcome 1 of B2.4). We therefore never hand a J257 student the J247 list.
| Section and outcome | OCR's Higher-only wording | What we do with it |
|---|---|---|
| B1.1, outcome 8 | "explain simply how the sequence of bases in DNA codes for the proteins made in protein synthesis, including the idea that each set of three nucleotides is the code for an amino acid" | Base sequences read in threes, with an amino acid chain written beneath. |
| B1.1, outcome 9 | "recall a simple description of protein synthesis": a copy of a gene is made from messenger RNA (mRNA), the mRNA travels to a ribosome in the cytoplasm, the ribosome joins amino acids together in an order determined by the mRNA. OCR adds that learners are not expected to recall details of transcription and translation. | A three-line description is the target. We keep students from spending time on detail OCR says is not expected. |
| B1.1, outcomes 10 to 12 | "recall that all genetic variants arise from mutations"; "describe how genetic variants in coding DNA may influence phenotype by altering the activity of a protein"; the same for non-coding DNA, "by altering how genes are expressed" | One diagram with two branches, coding and non-coding, each ending in a phenotype effect. |
| B1.2, outcome 7 | Bold in part only. The outcome reads "describe the development of our understanding of genetics including the work of Mendel"; the words "and the modern-day use of genome sequencing" are the Higher-only addition. | Mendel is for both tiers. For Higher we add a short answer on how whole-genome sequencing is used today. |
| B1.3, outcome 3 | "describe the main steps in the process of genetic engineering": isolating and replicating the required gene(s); putting the gene(s) into a vector (e.g. a plasmid); using the vector to insert the gene(s) into cells; selecting modified cells | OCR gives the steps in order, and we have the student reproduce that order and justify each step in a phrase. |
| B2.4, outcomes 4 and 5 | "describe how monoclonal antibodies are produced", including antigen injected into an animal, antibody-producing cells taken from the animal, and cells producing the correct antibody selected then cultured; and "describe some of the ways in which monoclonal antibodies can be used in diagnostic tests" | Production as a three-stage sequence, then diagnostic use as its own short answer. |
| B2.6, outcome 5 | "describe how monoclonal antibodies can be used to treat cancer" | Kept separate from diagnostic use so the student answers the question that was asked. |
| B3.1, outcome 5 | "use the inverse square law to explain changes in the rate of photosynthesis with distance from a light source" | Distance-and-rate questions with the light source moved, reasoned as 1/d2 instead of by a straight-line guess. |
| B3.1, outcome 6 | "explain the interaction of temperature, light intensity and carbon dioxide concentration in limiting the rate of photosynthesis, and use graphs depicting the effects" | Graph-led limiting-factor questions. In J247 the inverse square law sits in the maths table (BM1.4v); in J257 it is a learning outcome in its own right. |
| B4.2, outcome 2c | "calculate with numbers written in standard form" | Magnification and scale calculations in standard form. |
| B4.4, outcomes 2 and 3 | "describe some of the variety of effects of plant hormones, relating to gibberellins and ethene"; "describe some of the different ways in which people use plant hormones to control plant growth" | Outcome 1, auxins in phototropisms and gravitropisms, is for both tiers. Higher adds the two further hormones and the commercial uses. |
| B5.2, outcome 5 | "explain some of the difficulties of investigating brain function" | A balanced answer on method and ethics. |
| B5.3, outcome 2 | "explain the roles of thyroxine and adrenaline in the body, including thyroxine as an example of a negative feedback system" | Thyroxine as the first worked feedback loop. |
| B5.4, outcomes 3, 6 and 7 | "explain the response of the body to different temperature challenges, including receptors, processing, responses and negative feedback"; "describe the effect of ADH on the permeability of the kidney tubules"; "explain the response of the body to different osmotic challenges, including receptors, processing, response, and negative feedback" | The same receptor, processing, response, feedback template used for temperature and for water balance. |
| B5.5, outcomes 2 and 4 | "explain the interactions of FSH, LH, oestrogen and progesterone in the control of the menstrual cycle"; "explain the use of hormones in modern reproductive technologies to treat infertility" | Cycle timeline first, treatment applications second. |
| B5.6, outcomes 2 and 6 | "explain how glucagon and insulin work together to control the blood sugar level in the body"; "explain some of the limitations in treating damage and disease in the brain and other parts of the nervous system" | The two-hormone feedback diagram, and a limitations answer with one named example per limit. |
| B6.4, outcome 2 | "evaluate evidence for the impact of environmental changes on the distribution of organisms, with reference to water and atmospheric gases" | Evaluation of supplied data in the same pattern, limitation, further-evidence structure as the J247 equivalent. |
| IaS4, outcome 3d | In the Ideas about Science chapter: "distinguish between perceived and calculated risk" | Short risk-and-benefit answers with the calculated risk separated from how risky something feels. |
Plain reading of the two tables: both codes put hormones, homeostasis, protein synthesis, genetic engineering and monoclonal antibodies at Higher tier, and the statements cluster around explanation and evaluation, not new vocabulary. We therefore teach Higher tier as a set of explained chains, with a model answer for each, instead of as extra lists.
Studying Biology B (J257)? Our expert Higher tier biology tutors prepare students for Breadth and for Depth separately.
Depth carries the extended answers, so we practise those against OCR's Level of Response wording. Book a short call about J257 Higher tier tuition.
Book a Free Consultation Message us on WhatsAppMy son was low in confidence after COVID and the gaps in learning were building up. Using this service helped plug those gaps, rebuild confidence, and improve his ability to learn properly again.
We arranged maths and English tuition ahead of GCSEs and both tutors were brilliant. My daughter's grades improved, and by results day she achieved two grades higher than in her mock exams.
I attended an English bootcamp with Leading Tuition and the experience was excellent. The teacher gave focused attention to the small group while keeping the lessons interactive and engaging.
OCR's wording for both codes is that Higher Tier assesses grades 9 to 4, and Foundation Tier assesses grades 5 to 1. OCR also says an allowed grade 3 may be awarded on the Higher Tier option for learners who are a small number of marks below the grade 3/4 boundary.
OCR's rule on entry is firm: each learner must be entered for the Foundation Tier or the Higher Tier only and cannot be entered for a combination of tiers. Retakes follow the same pattern. OCR allows as many retakes as a learner wishes, and a retake means taking all the papers of the relevant tier, in the single May/June series OCR describes for these qualifications. Our own working view, which is ours and not the board's, is that Higher is the right entry for a student who can reach grade 6 or above, since Foundation stops at 5, and for a student near the 4/5 line who is comfortable with explanation questions. We bring the school's recent mock marks into the first session so that view rests on the student's papers.
The first conversation with a family is therefore short and specific: which code, which tier is entered, and what the school's mock paper marks look like against the boundary tables below. The tables show what OCR's grade 4 and grade 9 asked of students in four past series, so that a target rests on a published figure.
The tables use OCR's own published boundary documents for the four June series in our tables, Higher rows only. OCR lists boundaries in the order grade 9, 8, 7, 6, 5, 4, 3 for Higher. OCR's note on the documents reads: "'Grades' at component level don't automatically add up to the same grade at qualification level." The qualification grade comes from the overall total, so the component figures are a guide to a student's balance between the two papers, not the grade itself. Percentages in our text are our own division of the board's figures by the marks available.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
|---|---|---|---|---|---|---|---|
| June 2023 | 133 | 121 | 109 | 91 | 73 | 55 | 46 |
| June 2024 | 142 | 131 | 121 | 104 | 87 | 70 | 61 |
| June 2025 | 139 | 128 | 117 | 100 | 83 | 66 | 57 |
| June 2026 | 141 | 131 | 121 | 103 | 86 | 69 | 60 |
On J247, a grade 4 took between 55 and 70 of 180 marks, which is 30.6% to 38.9%. The grade 4 boundary was 55 in June 2023 and 70 in June 2024, a 15-mark swing between adjoining series. The gap between OCR's grade 4 and grade 3 figures was 9 marks in all four series. Grade 9 ran from 133 to 142 marks, 73.9% to 78.9% of the total. Grade 7 ranged from 109 to 121, which is 60.6% to 67.2%.
| J247 component, out of 90 | Grade | June 2023 | June 2024 | June 2025 | June 2026 |
|---|---|---|---|---|---|
| Paper 3 | 9 | 69 | 73 | 71 | 74 |
| Paper 3 | 4 | 29 | 35 | 35 | 39 |
| Paper 4 | 9 | 64 | 69 | 68 | 67 |
| Paper 4 | 4 | 26 | 35 | 31 | 30 |
The two J247 papers do not move together. Paper 3's grade 4 figure rose from 29 to 39 of 90 (32.2% to 43.3%) across the four series, while Paper 4's ranged from 26 to 35 (28.9% to 38.9%). For a student, that means a mark of 30 on Paper 3 sat below the grade 4 figure in three of four series and above it in only the first, so the paper matters as much as the mark. We therefore set practice-paper targets paper by paper, as a range, never as a single pass mark.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
|---|---|---|---|---|---|---|---|
| June 2023 | 128 | 115 | 103 | 87 | 71 | 55 | 47 |
| June 2024 | 143 | 131 | 119 | 100 | 81 | 63 | 54 |
| June 2025 | 141 | 129 | 118 | 98 | 79 | 60 | 50 |
| June 2026 | 138 | 124 | 110 | 91 | 72 | 53 | 43 |
On J257, a grade 4 took between 53 and 63 of 180, which is 29.4% to 35.0%, and grade 9 ran from 128 to 143, which is 71.1% to 79.4%. The grade 4 to grade 3 gap was 8, 9, 10 and 10 marks in the four series. Grade 7 ranged from 103 to 119 marks, 57.2% to 66.1%.
| J257 component, out of 90 | Grade | June 2023 | June 2024 | June 2025 | June 2026 |
|---|---|---|---|---|---|
| Breadth (03) | 9 | 68 | 70 | 70 | 67 |
| Breadth (03) | 4 | 34 | 33 | 30 | 24 |
| Depth (04) | 9 | 60 | 73 | 71 | 71 |
| Depth (04) | 4 | 21 | 30 | 30 | 29 |
The J257 papers diverged most. On Breadth, the grade 4 figure fell from 34 to 24 of 90 (37.8% to 26.7%) while on Depth it rose from 21 to a plateau of 29 or 30 (23.3% to 33.3%). The Depth grade 9 figure moved from 60 to 73 of 90, which is 66.7% to 81.1%, a 13-mark change. We keep a separate target line for each paper and update it from the student's own timed attempts.
The sources for every figure above are the OCR grade boundaries page and the specifications for Biology A (J247) and Biology B (J257).
Our expert Higher tier biology tutors set a target range for each paper and teach towards it.
Book a free consultation about OCR GCSE Biology tutoring for J247 or J257, and we will start from the figures above.
Book a Free Consultation Message us on WhatsAppThe structure follows from the three sets of figures above: the Higher-only statements, the paper shapes, and the boundary spread.
First, the code and the school's teaching order. We ask which code the school enters and where the class is in its scheme, then place the Higher-only statements in the order the student will meet them. For J247 that usually means the B3 hormone and homeostasis statements early, because B3.2b, B3.3i and B3.3d share the negative feedback idea that OCR names in B3.2b and B3.3i. For J257 the same material is spread across B5.3 to B5.6.
Second, explanation chains rather than lists. Most Higher-only statements begin with "explain", "describe" or "evaluate". Each lesson ends with a model answer the student writes unaided, which we mark against the specification's wording.
Third, timed papers that follow the code. A J247 student sits Paper 3 and Paper 4 questions under the 1.17-minute-per-mark rate. A J257 student sits a Depth paper with at least 12 marks of extended answers and a Breadth paper without any, and we log marks by paper.
Fourth, a target range per paper. Because the J247 overall grade 4 figure alone spans 15 marks across the four series, a single pass mark would mislead. A student's target is stated as the range between the lowest and the highest published figure for the grade they want, then narrowed as their timed marks settle.
Fifth, the maths that Higher tier uses: standard form for J247 under BM1.1iii and J257 under B4.2, and the inverse square law, with a calculator permitted on every component.
OCR says Higher Tier assesses grades 9 to 4 in both Biology A (J247) and Biology B (J257). An allowed grade 3 may be awarded on the Higher Tier option for learners who are a small number of marks below the grade 3/4 boundary. Foundation Tier assesses grades 5 to 1, so a student aiming for grade 6 or above needs the Higher entry. A learner is entered for one tier only and cannot combine tiers.
Ask the school's science department or exams officer which of the two OCR codes it enters. The paper names also differ: J247 Higher students sit Paper 3 (J247/03) and Paper 4 (J247/04), while J257 Higher students sit Breadth (J257/03) and Depth (J257/04). Both pairs carry 90 marks and last 1 hour 45 minutes, so the length of the paper does not identify the course. We confirm the code in the first session before planning lessons.
In OCR's June 2026 boundaries, grade 4 on Biology A (J247) Higher was 69 of 180 marks, which is 38.3%, with 60 marks as the grade 3 figure. On Biology B (J257) Higher, grade 4 was 53 of 180, which is 29.4%, with 43 as the grade 3 figure. Across the four June series in our tables the J247 grade 4 figure ran from 55 to 70 and the J257 figure from 53 to 63, so we set targets as ranges.
On Biology A, each Higher paper has a 75-mark Section B that includes an extended six-mark Level of Response question, after 15 marks of multiple choice in Section A. On Biology B, OCR says extended response questions are not found on the Breadth paper, and the Depth paper has at least two extended response questions of 6 marks each, so at least 12 of its 90 marks. We practise six-mark answers on both codes.
OCR's Biology A specification says learners can retake the qualification as many times as they wish, and must retake all the papers of the relevant tier to be awarded it. Both specifications describe one examination series each year in May/June, so the next opportunity is the following May/June. A Higher retake means all of Paper 3 and Paper 4 (J247) or Breadth and Depth (J257): 180 marks over two papers of 1 hour 45 minutes.
OCR permits a scientific or graphical calculator for components 01, 02, 03 and 04 of both specifications. At least 10% of the assessment is mathematical skills, and Higher tier maths questions are not lower in demand than Foundation tier GCSE Mathematics. In OCR's tables, standard form is Higher-only in Biology A (BM1.1iii) and in Biology B (B4.2, outcome 2c), and the inverse square law is Higher-only in the Biology A maths table (BM1.4v) and in B3.1 outcome 5 of Biology B.
We start with the hormone and homeostasis statements because they share one idea. In Biology A, B3.2b names thyroxine as a negative feedback system, B3.3i names negative feedback for ADH, and B3.3d adds glucagon alongside insulin. In Biology B the same ideas sit in B5.3 outcome 2, B5.4 outcomes 3, 6 and 7 and B5.6 outcome 2. Once a student can draw one feedback loop, the other statements reuse it, so these come before genetic engineering (B6.2e) and monoclonal antibodies (B6.3m).
Rated 4.8 out of 5 on Trustpilot from 59 reviews, read on 3 October 2026. Book a free consultation about Higher tier biology tuition for J247 or J257, or see our Higher tier OCR GCSE Maths tutoring and GCSE tuition.
Book a Free Consultation