AI-assisted English content review; independent teacher approval pending.
Practice scope and review
Original, AI-authored English practice with worked guidance. Selected topics only; independent teacher review is pending. This is not a complete syllabus, official past-paper collection or predicted exam score. Check your own exam-board specification: these concepts are not certified against a particular board or exam year.
72 original questions across 15 selected topic areas. No account or payment required to practise.
Cambridge International AS & A Level Biology (9700), examination year 2027: AI-assisted conceptual alignment to official sources, not teacher or exam-board certification. Syllabus mapping and remaining coverage.
3 questions in this topic
This is a limited practice preview and is not submitted for search indexing.
All topics
Original English concept practice addressing selected identified gaps. Not complete syllabus coverage or practical competence.
Selected subtopics: Specified pathogens and transmission · Antibiotic action and selection · Active and passive immunity · Antibody specificity
3 of 3 questions shown
Loading saved responses
Question 1For a paper-based comparison, pair cholera, malaria, tuberculosis and HIV/AIDS with their pathogen types and principal transmission routes. Explain how a different prevention priority follows for waterborne cholera versus mosquito-borne malaria. Do not prescribe medicines or claim that one measure eliminates either disease.5 indicative marks
Explain using the evidence5 indicative marksNo calculator
For a paper-based comparison, pair cholera, malaria, tuberculosis and HIV/AIDS with their pathogen types and principal transmission routes. Explain how a different prevention priority follows for waterborne cholera versus mosquito-borne malaria. Do not prescribe medicines or claim that one measure eliminates either disease.
Cambridge 2027: Direct conceptual match
Original targeted concept exercise: Checked four mandated disease/type/route pairings and route-linked prevention at syllabus level; no current treatment recommendations or infection procedures. This is conceptual placement, not completion of the entire referenced subsection.
The pathogen is not the same as its vector: the mosquito transmits Plasmodium rather than being the protoctist itself. A viral cause also distinguishes HIV from the bacterial examples.
Link prevention to the specific transmission step. A water treatment intervention does not by itself address mosquito feeding, and vector measures do not replace sanitation; social and economic constraints remain part of prevention.
Self-marking points
View marking points
Cholera is caused by the bacterium Vibrio cholerae and spreads through ingestion of contaminated food/water.
Malaria is caused by Plasmodium protoctists and is transmitted by infected mosquito vectors.
Tuberculosis is bacterial, including Mycobacterium tuberculosis, and spreads through infectious airborne particles.
HIV is a virus transmitted through relevant infected body fluids, including sexual transmission, contaminated blood exposure and mother-to-child transmission.
Safe water/sanitation targets cholera ingestion routes; reducing mosquito exposure/vector transmission targets malaria, with practical implementation and access affecting effectiveness.
Examiner tip
These are original indicative marking points, not an official Cambridge answer key. State assumptions and connect each conclusion to the supplied evidence.
Question 2A fictional bacterial population already contains a rare heritable penicillin-resistance allele. After exposure, resistant cells become more frequent. Explain penicillin's bacterial target, why it does not directly treat a viral infection, and how selection changes allele frequency without bacteria mutating because they 'need' resistance.4 indicative marks
Explain using the evidence4 indicative marksNo calculator
A fictional bacterial population already contains a rare heritable penicillin-resistance allele. After exposure, resistant cells become more frequent. Explain penicillin's bacterial target, why it does not directly treat a viral infection, and how selection changes allele frequency without bacteria mutating because they 'need' resistance.
Cambridge 2027: Direct conceptual match
Original targeted concept exercise: Verified bacterial-wall target versus viruses and explicit pre-existing-variation selection; no dosing or treatment instruction. This is conceptual placement, not completion of the entire referenced subsection.
Separate mechanism from evolution. A drug can affect a bacterial structural process but not an unrelated viral structure.
The starting rare allele is supplied by the question. Differential reproductive success changes its representation; a statement that all individual bacteria 'become used to' the drug would omit inheritance and selection.
Self-marking points
View marking points
Penicillin interferes with bacterial cell-wall formation; viruses lack that bacterial cell-wall target.
Susceptible bacteria are inhibited/killed more effectively under exposure, while resistant variants are more likely to survive and reproduce.
Descendants inherit resistance, increasing its frequency across generations.
Pre-existing genetic variation is selected; the exposure does not imply directed mutation in anticipation of need.
Examiner tip
These are original indicative marking points, not an official Cambridge answer key. State assumptions and connect each conclusion to the supplied evidence.
Question 3After a first exposure to antigen A, antibody concentration rises slowly; a later exposure to A produces a faster, larger rise. Explain using B cells, plasma cells and memory cells. Distinguish vaccination from receiving ready-made antibodies, relate antibody variable regions to specificity, and state what makes a monoclonal antibody preparation different from a mixed antibody response.5 indicative marks
Explain using the evidence5 indicative marksNo calculator
After a first exposure to antigen A, antibody concentration rises slowly; a later exposure to A produces a faster, larger rise. Explain using B cells, plasma cells and memory cells. Distinguish vaccination from receiving ready-made antibodies, relate antibody variable regions to specificity, and state what makes a monoclonal antibody preparation different from a mixed antibody response.
Cambridge 2027: Direct conceptual match
Original targeted concept exercise: Checked primary/secondary response cell roles, active/passive distinction and antibody/monoclonal specificity; hybridoma production and full T-cell sequence remain gaps. This is conceptual placement, not completion of the entire referenced subsection.
The second curve is evidence of immunological memory, not proof that antibodies against A will bind every antigen. Plasma cells are the antibody-secreting differentiated cells; memory cells support future activation.
Passive transfer can act quickly but its antibodies decline; active immunity takes time to develop. Monoclonality concerns common clone/epitope specificity, not an unsupported claim that all antibodies have the same variable region.
Self-marking points
View marking points
Antigen-specific B cells are selected/activated and proliferate; plasma cells secrete antibodies during the response.
Memory cells persist and support a quicker, larger secondary response to the same antigen.
Vaccination stimulates an active response and memory; ready-made antibodies provide passive protection without creating that recipient memory response by themselves.
Variable regions form antigen-binding sites whose complementary shapes underlie specificity.
A monoclonal preparation derives from one cell clone and recognises one epitope, rather than the mixture of specificities in a polyclonal response.
Examiner tip
These are original indicative marking points, not an official Cambridge answer key. State assumptions and connect each conclusion to the supplied evidence.
