CIE A Level Biology復習筆記4.1.4 Cell Signalling
Cell Signalling Cell signalling is the process by which messages are sent to cells Cell signalling is very important as it?allows multicellular organisms to control / coordinate their bodies and re...
CIE A Level Biology復習筆記4.1.3 The Cell Surface Membrane
Cell Surface Membranes Phospholipids Form the basic structure of the membrane (phospholipid bilayer) The tails form a hydrophobic core comprising the innermost part of both the outer and inner laye...
CIE A Level Biology復習筆記4.1.2 Components of Cell Surface Membranes
Phospholipids, Cholesterol, Glycolipids, Proteins & Glycoproteins The cell membranes of all organisms generally have a similar structure Cell membranes contain several different types of molecu...
CIE A Level Biology復習筆記4.1.1 The Fluid Mosaic Model
The Fluid Mosaic Model of Membranes Membranes are vital structures found in all cells The cell surface membrane creates an enclosed space separating the internal cell environment from the external ...
CIE A Level Biology復習筆記3.2.8 Enzyme Activity: Immobilised v Free
Enzyme Activity: Immobilised v Free Enzymes can be added to?solutions?and are thereby considered?‘free’?or they can be?immobilised Immobilised enzymes are enzymes that have been bound to an?inert,?...
CIE A Level Biology復習筆記3.2.7 Enzyme 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 shape?to...
澳洲AMC考試2022即將開賽，抓緊時間備賽！
相較于美國AMC，澳洲數學學術活動（澳洲AMC）對初次參加考試或者比賽的新生比較友好，澳洲3年級的小朋友就可以參加學術活動。澳洲AMC考試2022即將開賽！今天不如就讓我們一起來了解一下這項風靡全球的數學國際學...
CIE A Level Biology復習筆記3.2.6 Vmax & the Michaelis-Menten Constant
Vmax & the Michaelis-Menten Constant Substrate concentration?affects the?rate of catalysis?in an enzyme-substrate reaction When the substrate concentration is?fixed?(and enzyme concentration is...
CIE A Level Biology復習筆記3.2.5 Rate: Inhibitor Concentration
Rate: Inhibitor Concentration There are?two types?of inhibitors: Competitive?inhibitors have a?similar shape?to that of the?substrate?molecules and therefore?compete?with the substrate for the acti...
CIE A Level Biology復習筆記3.2.3 Rate: 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...
CIE A Level Biology復習筆記3.2.2 Rate: pH
Rate: pH All enzymes have an?optimum pH?or a pH at which they operate best Enzymes are?denatured?at extremes of pH Hydrogen?and ionic bonds?hold the tertiary structure of the protein (ie. the enzym...
CIE A Level Biology復習筆記3.2.1 Rate: Temperature
Rate: Temperature Enzymes have a?specific optimum temperature?– the temperature at which they catalyse a reaction at the?maximum rate Lower temperatures?either?prevent?reactions from proceeding or?...
