AQA A Level Biology复习笔记 1.5.5 Ribosomes
Ribosomes Ribosomes are small organelles that are either free in the cytoplasm (of all cells) or are attached to the rough endoplasmic reticulum (only in eukaryotic cells) Ribosomes are the ...
AQA A Level Biology复习笔记1.5.4 The Structure of RNA
The Structure of RNA Like DNA, the nucleic acid RNA (ribonucleic acid) is a polynucleotide – it is made up of many nucleotides linked together in a chain Like DNA, RNA nucleotides contain th...
AQA A Level Biology复习笔记1.5.3 The Structure of DNA
The Structure of DNA The nucleic acid DNA is a polynucleotide – it is made up of many nucleotides bonded together in a long chain A DNA nucleotide DNA molecules are made up of two pol...
AQA A Level Biology复习笔记1.5.2 Nucleotide Structure & the Phosphodiester Bond
Nucleotide Structure & the Phosphodiester Bond Both DNA and RNA are polymers that are made up of many repeating units called nucleotides Each nucleotide is formed from: A pentose sugar (...
AQA A Level Biology复习笔记1.4.14 Practical Skill: Controlling Variables & Calculating Uncertainty
Practical Skill: Control of Variables & Uncertainty Enzyme rate experiments are experiments that are carried out to determine the effect of changing a particular factor on the rate of a ...
AQA A Level Biology复习笔记1.4.13 Models & Functions of Enzyme Action
Students should be able to: Appreciate the Models & Functions of Enzyme Action Models of enzyme action Scientists often use models to explain their observations from experiments As techn...
AQA A Level Biology复习笔记1.4.12 Limiting Factors Affecting Enzymes: Inhibitors
Enzyme Inhibitors An enzyme's activity can be reduced or stopped, temporarily, by a reversible inhibitor There are two types of reversible inhibitors: Competitive inhibitors have a similar s...
AQA A Level Biology复习笔记1.4.11 Limiting Factors Affecting Enzymes: Substrate Concentration
Rate: Substrate Concentration The greater the substrate concentration, the higher the rate of reaction: As the number of substrate molecules increases, the likelihood of enzyme-substrate com...
AQA A Level Biology复习笔记1.4.10 Limiting Factors Affecting Enzymes: Enzyme Concentration
Rate: Enzyme Concentration Enzyme concentration affects the rate of reaction The higher the enzyme concentration in a reaction mixture, the greater the number of active sites available and the grea...
