中國學生高考成績申請劍橋，新增一項筆試！
近兩年在疫情和相關政策的影響下，越來越多的同學選擇了英美雙申或直接轉向英國方向申請。 作為英國的代表高校，劍橋大學是很多同學的“夢中情?！?。 可能還有些同學不太了解，其實劍橋多年來一直是接受中國學生通...
Edexcel A (SNAB) A Level Biology:復習筆記2.3.3 Nature of the Genetic Code
Nature of the Genetic Code The triplet code The sequence of DNA nucleotide bases found within a gene is determined by a?triplet?(three-letter)?code Each sequence of?three bases?(i.e. each triplet o...
Edexcel A (SNAB) A Level Biology:復習筆記2.3.2 Translation
Translation Translation occurs?in the cytoplasm?of the cell After leaving the nucleus via a nuclear pore, the?mRNA molecule attaches to a ribosome In the cytoplasm there are?free molecules of tRNA?...
Edexcel A (SNAB) A Level Biology:復習筆記2.3.1 Transcription
Transcription A?gene?is a?sequence of nucleotide bases?in a DNA molecule that?codes for the production of a specific sequence of amino acids, that in turn make up a?specific polypeptide?(protein) T...
Edexcel A (SNAB) A Level Biology:復習筆記2.2.3 RNA: Structure
RNA: Structure 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 the nitrogenous...
Edexcel A (SNAB) A Level Biology:復習筆記2.2.2 DNA: Structure
DNA: Structure The nucleic acid DNA is a?polynucleotide?– it is made up of?many nucleotides?bonded together in a?long chain DNA nucleotide DNA molecules are made up of?two polynucleotide str...
Edexcel A (SNAB) A Level Biology:復習筆記2.2.1 Nucleotides & Phosphodiester Bonds
Mononucleotides: Structure Both DNA and RNA are?polymers?that are made up of?many repeating units?called?nucleotides Each nucleotide is formed from: A?pentose sugar?(a sugar with 5 carbon atoms) A ...
CS專業力壓藤校，實力被嚴重低估的公立常春藤——UIUC伊利諾伊大學香檳分校
社會捐贈作為美國大學重要的資金來源之一，是學校提供高質量教學、研究和服務的基本保證！ 近日，UIUC官宣他們已提前達成了“計劃在5年時間內實現22.5億美元慈善籌款”計劃，僅僅用了四年，伊大就累計籌得款項27億...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.8 Osmosis
Osmosis All cells are surrounded by a cell surface membrane which is?partially permeable Water can move in and out of cells across the cell surface membrane by a process called?osmosis Osmosis is t...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.7 Active Transport
Active Transport Active transport is the?movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration Active transport?requires en...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.6 Diffusion & Facilitated Diffusion
Diffusion & Facilitated Diffusion Diffusion is a type of?transport?that can occur?across a cell membrane Note that diffusion can also happen within a cellular compartment; the presence of a mem...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.5 Practical: Investigating Membrane Structure & Permeability
Practical: Investigating Membrane Structure & Permeability The?permeability?of?cell membranes?is affected by several?factors?such as Temperature pH The effect of such factors on membrane struct...
