Which statement about enzymes is correct?
Elige una respuesta para ver la explicación
Biology is the third section of CEnT-S: 10 questions in 20 minutes. Questions sit at definition-and-mechanism level — you need precise vocabulary rather than long calculations.
Cell biology and genetics form the backbone. Compared with IMAT, plant biology and ecology are more visible, while human physiology is tested more lightly.
Análisis de la distribución de preguntas
Temas de Biology de CEnT-S: frecuencia
¿Qué temas requieren más atención? Este es el desglose por temas a partir de nuestros datos de preguntas de CEnT-S:
| Tema | Total | |
|---|---|---|
| Cell Cycle, Division & Inheritance | 3 | |
| Cell Biology | 2 | |
| Animal Anatomy & Physiology | 2 | |
| Biological Molecules | 2 | |
| Plant Biology & Ecology | 1 |
*Expected topic split of one 10-question Biology section, based on the CISIA syllabus and our exam-weight model.
Ideas clave
- Genetics carries the highest weight: DNA → RNA → protein and Mendelian crosses.
- Cell biology: organelle functions, membrane transport and osmosis are reliable points.
- Plant biology & ecology appear more often than in IMAT — do not skip photosynthesis and food chains.
- Physiology is broad but shallow: know the function of each system, not every detail.
Análisis de dificultad
Dificultad de los temas y reparto de estudio recomendado
No todos los temas exigen el mismo tiempo. Algunos requieren mucha práctica resolviendo problemas; otros dependen de recordar con precisión conceptos concretos:
Difícil
Cell Cycle, Division & Inheritance 2 weeksMedio
Animal Anatomy & Physiology 1.5–2 weeksMedio
Cell Biology 1.5 weeksMedio
Plant Biology & Ecology 1 weekFácil
Biological Molecules 4–5 days¿No sabes por dónde empezar tu preparación?
Haz el test diagnóstico gratuito de CEnT-S: conoce tu nivel de partida en cada sección y recibe un plan de estudio personalizado con IA.
Hacer el test diagnósticoDesglose del temario oficial
Temas de Biology de CEnT-S: cómo se evalúa cada uno
Un repaso tema por tema de la sección de Biology del official CISIA CEnT-S syllabus:
01
Biological Molecules Fácil
- Water and its properties.
- Carbohydrates, lipids, proteins and nucleic acids: monomers and functions.
- Enzymes: activation energy, specificity, effect of temperature and pH.
Cómo aparece en CEnT-S: Matching a molecule to its monomer or function; enzyme statements (they are not consumed and do not shift equilibrium).
02
Cell Biology Medio
- Prokaryotic vs eukaryotic cells.
- Plasma membrane, nucleus, ribosomes, endomembrane system, mitochondria, cytoskeleton.
- Plant-specific structures: cell wall, chloroplasts, vacuoles; osmosis and membrane transport.
Cómo aparece en CEnT-S: ‘Where does process X take place?’ and osmosis scenarios (red blood cells in hypo-/hypertonic solutions).
03
Cell Cycle, Division & Inheritance Difícil
- Genome characteristics; DNA and RNA coding.
- Replication, transcription and translation.
- Mitosis and meiosis; Mendelian inheritance and cross probabilities.
Cómo aparece en CEnT-S: Phase-of-the-cell-cycle questions and simple monohybrid/dihybrid cross probabilities (e.g. 1/4, 3/16).
04
Plant Biology & Ecology Medio
- Plant anatomy: root, stem, leaf, flower, fruit, seed.
- Photosynthesis: inputs, outputs and location.
- Energy flow, ecosystems, food chains and biotic interactions.
Cómo aparece en CEnT-S: Conceptual items on energy loss between trophic levels and on the light/dark phases of photosynthesis.
05
Animal Anatomy & Physiology Medio
- Tissue types.
- Musculoskeletal, digestive and respiratory systems.
- Circulatory, excretory and nervous systems.
Cómo aparece en CEnT-S: Function-level questions: which organ does what, the path of blood, where digestion of each nutrient begins.
Official CISIA Syllabus
The full, official CEnT-S syllabus and test structure are published by CISIA:
cisiaonline.it — CEnT-S structure and syllabusProblemas de examen resueltos
Preguntas de ejemplo de Biology de CEnT-S y tácticas de eliminación
Descubre cómo se construyen las preguntas de biology de CEnT-S y cómo una eliminación disciplinada evita la penalización de −0.25:
A red blood cell is placed in distilled water. What is most likely to happen?
Elige una respuesta para ver la explicación
During which phase of the cell cycle is nuclear DNA replicated?
Elige una respuesta para ver la explicación
Análisis de trampas del examen
Los 5 errores más comunes en Biology de CEnT-S
Errores conceptuales y tácticos recurrentes que les cuestan puntos decisivos a los estudiantes:
01
Mitosis vs meiosis
Know the chromosome number (2n/n) at every stage; most errors come from mixing up sister chromatids and homologous chromosomes.
02
Enzymes and equilibrium
Catalysts change the rate, never the equilibrium position or the yield.
03
Tonicity direction
Water moves toward the higher solute concentration. ‘Hypotonic solution’ means the cell swells.
04
Transcription vs translation
Transcription: DNA → mRNA in the nucleus. Translation: mRNA → protein at the ribosome.
05
Ignoring plant biology
CEnT-S tests photosynthesis and plant structures more than IMAT; students coming from IMAT material often skip them.
Hoja de ruta de estudio
Hoja de ruta estratégica de estudio de 10 semanas
Weeks 1–2
Diagnostic & Foundations
Take a timed diagnostic; rebuild the Foundation topics marked ‘Easy’ and note every error type.
Weeks 3–5
Core Topics
Work through the ‘Medium’ and ‘Hard’ topics in the order of the frequency table; 20–30 targeted questions per topic.
Weeks 6–7
Mixed Practice
Mixed sets under section timing (2 min/question). Keep an error log: concept, reading or calculation.
Weeks 8–9
Full Mocks
One full 65-question CEnT-S mock per week with real section timers; review every wrong and every guessed answer.
Week 10
Final Polish
Re-do your error log, revise traps, and practise the skip-or-guess rule for the −0.25 penalty.