All resources for B1.1 Cell Structures GCSE OCR Biology Gateway 9-1. Triple and combined (Higher and Foundation) is covered in this material. Each PowerPoint is a whole lessons included with student activities and animated answers. Cells are the building blocks of living objects. Definition of eukaryotic cells Typical size of eukaryotic cells Subcellular structure of animal cells Subcellular structure of plant cells Organelles and their functions Revision activities (Look, Cover, Write, Check) Print out of animal and plant cells Typical size of bacterial cells Subcellular structure of bacterial cells Functions of subcellular structure of bacterial cells Comparing animal, plant, and bacterial cells Revision activity - flash cards Print out of bacterial cell Labeling a light microscope Defining magnification and resolution. Explaining why stains are used for light microscope. Calculating total magnification, objective lens magnification and eyepiece lens magnification. Calculating actual size, magnification, and magnified size of objects. Converting from from micrometre (µm) to millimetres (mm) Rearranging equations Comparing sizes of different cells Using standard form Using SI prefixes (nano, micro, milli, kilo, mega) Comparing electron microscopes and light microscopes.

All resources for B1.2 What happens in cells? GCSE OCR Biology Gateway 9-1. Triple and combined (Higher and Foundation) is covered in this material. Each PowerPoint is a whole lessons included with student activities and animated answers. DNA stands for deoxyribonucleic acid. DNA is found in the nucleus of cells. DNA is packaged into a thread-like structure called chromosomes. Humans typically have 46 chromosomes shared from their parents. Genes are sections of DNA that code for physical characteristics. The structure of DNA. DNA is comprised of monomers called nucleotides. A nucleotide consists of a phosphate group, a sugar (deoxyribose), and an organic base. There are four organic bases: Adenine, A. Thymine, T. Cytosine, C. Guanine, G. Hydrogen bonds in DNA. The role of proteins and AI Proteins as polymers Explaining transcription mRNA and complementary bases Explaining translation Enzymes are made of protein. Enzymes are biological catalysts. Catalysts speed up the rate of reaction without being used up themselves. Enzymes and the lock and key hypothesis. Enzymes breaking down and bonding substrates. Enzymes-catalysed reactions Rate of reaction Denaturing of enzymes and the active site Optimum temperature and optimum pH for enzymes Definition of concentration Increasing concentration of enzymes and substrates Saturation of substrates