Singapore · SEABQ&A
BiologyQ&A by dot point
A short Q&A bank for every Singapore Biology syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Cell Biology
- Explain the principles of cell signalling, including the roles of receptors, signal transduction and second messengers6Q&A pairs
- Describe the ultrastructure of prokaryotic and eukaryotic cells and relate the structure of organelles to their functions5Q&A pairs
- Describe the four levels of protein structure and explain how structure determines function, including the effect of denaturation5Q&A pairs
- Describe the cell cycle and the stages of mitosis, and explain the significance of mitosis and the consequences of uncontrolled division4Q&A pairs
- Describe the fluid mosaic model of membrane structure and relate the roles of phospholipids, proteins, cholesterol and carbohydrates to membrane function4Q&A pairs
- Describe the structure of carbohydrates, lipids, proteins and nucleic acids and relate structure to function4Q&A pairs
- Explain the mechanisms of diffusion, facilitated diffusion, osmosis, active transport, endocytosis and exocytosis across membranes4Q&A pairs
Infectious Disease and Immunity
- Explain how antibiotics treat bacterial infections and how antibiotic resistance arises and spreads3Q&A pairs
- Describe the structure and function of antibodies and explain the primary and secondary immune responses4Q&A pairs
- Describe the structure of bacteria and viruses as pathogens and explain how they cause infectious disease4Q&A pairs
- Describe the adaptive immune response, including the roles of T and B lymphocytes in the cell-mediated and humoral responses6Q&A pairs
- Describe the innate (non-specific) defences, including barriers, phagocytosis and the inflammatory response5Q&A pairs
- Explain how vaccination produces active immunity and how herd immunity protects a population, and distinguish active and passive immunity3Q&A pairs
Energy and Equilibrium
- Describe the structure of ATP and explain its role as the immediate energy source for cellular processes4Q&A pairs
- Distinguish competitive and non-competitive enzyme inhibition and explain end-product inhibition in metabolic control6Q&A pairs
- Explain how enzymes act as biological catalysts by lowering activation energy, and describe the lock and key and induced fit models5Q&A pairs
- Explain the effects of temperature, pH, substrate concentration and enzyme concentration on the rate of enzyme activity7Q&A pairs
- Describe glycolysis and the link reaction, including the products and the role of substrate-level phosphorylation4Q&A pairs
- Describe the light-dependent reactions of photosynthesis, including photophosphorylation and the photolysis of water4Q&A pairs
- Describe the Calvin cycle (light-independent reactions), including carbon fixation, reduction and the regeneration of the carbon dioxide acceptor4Q&A pairs
- Describe the Krebs cycle and oxidative phosphorylation, including chemiosmosis and the role of oxygen as the final electron acceptor5Q&A pairs
Inheritance and Evolution
- Explain dihybrid inheritance and the law of independent assortment, including the use of the chi-squared test6Q&A pairs
- Explain autosomal linkage, recombination by crossing over, and epistasis as causes of departure from expected ratios5Q&A pairs
- Explain monohybrid inheritance using genetic diagrams, including dominant, recessive, codominant and sex-linked alleles4Q&A pairs
- Explain natural selection and how it brings about evolution and adaptation, including directional, stabilising and disruptive selection4Q&A pairs
- Explain the sources of genetic variation: mutation, meiosis (crossing over and independent assortment) and random fertilisation6Q&A pairs
- Explain the concept of a species and the mechanisms of allopatric and sympatric speciation6Q&A pairs
- Use the Hardy-Weinberg principle to calculate allele and genotype frequencies and state the conditions for equilibrium4Q&A pairs
Molecular Genetics
- Explain the control of gene expression in prokaryotes (the lac operon) and the principles of eukaryotic gene control3Q&A pairs
- Describe the structure of DNA and explain the semi-conservative mechanism of DNA replication4Q&A pairs
- Describe the principles of recombinant DNA technology, PCR, gel electrophoresis and DNA sequencing and outline their applications5Q&A pairs
- Describe how DNA is organised into chromosomes and genomes and outline the applications of genome sequencing3Q&A pairs
- Describe the types of gene and chromosome mutation and explain their effects on protein structure and phenotype6Q&A pairs
- Describe the genetic code and explain its key properties: it is a triplet code, degenerate, non-overlapping and near universal3Q&A pairs
- Describe the processes of transcription and translation and the roles of mRNA, tRNA and ribosomes in protein synthesis4Q&A pairs