AQA A Level Biology復(fù)習(xí)筆記2.3.1 Interphase
Interphase Within multicellular organisms,?not all cells retain the ability to divide Eukaryotic cells that do retain the ability to divide show a cell cycle Mitosis?is part of a?precisely controll...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.4.1 Roots & Indices - Basics
What are indices? An Index (plural = indices) is just a power that a number (called the base) is raised to: Laws of indices – what you need to know There are lots of very important laws (or ...
AQA A Level Biology復(fù)習(xí)筆記2.2.1 Methods of studying cells
The Principles & Limitations of Microscopy Microscopes?can be used to analyse?cell components?and observe?organelles Magnification?and?resolution?are two scientific terms that are very importan...
AQA A Level Biology復(fù)習(xí)筆記2.1.1 The Cell Theory
The Cell Theory Until microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made from A scientist called?Robert Hooke?is thought to be the?...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.2 HCFs & LCMs
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.2 HCFs & LCMs What are Factors & Multiples? Factors are numbers (or expressions) which divide into another number exactly e.g. 3 is a factor of 18 as?
AQA A Level Biology復(fù)習(xí)筆記1.6.1 The Structure of ATP
The Structure of ATP All organisms require a constant supply of energy to maintain their cells and stay alive This energy is required: In anabolic reactions – building larger molecules from ...
AQA A Level Biology復(fù)習(xí)筆記1.5.1 The Function of DNA & RNA
The Function of DNA & RNA Deoxyribonucleic acid?(DNA) and?ribonucleic acid?(RNA) are both types of?nucleic acid DNA and RNA are both?found in all living cells DNA and RNA are both needed to?bui...
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.1 Prime Factors
Edexcel IGCSE Maths復(fù)習(xí)筆記 1.3.1 Prime Factors What are prime factors? Factors are things that are multiplied together Prime numbers are numbers which can only be divided by themselves and 1 The p...
AQA A LEVEL BIOLOGY復(fù)習(xí)筆記1.4.1 Many Proteins are Enzymes
Enzymes as Proteins Enzymes are?biological catalysts ‘Biological’ because they function in?living systems ‘Catalysts’ because they?speed up the rate of chemical reactions?without being used up or c...
