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where are tropane alkaloids biosynthesised from
Which free radical causes the breakdown of the ozone layer?
what feature is NOT essential of all alkaloids
In the colon, lot of cAMP being produced all the time from constantly active as subunit activates PKA-dependant Cl- channels (CFTR channels) on the apical membrane of the colon
how many stages are there to the break down of ozone?
What is the equation for the first stage of the breakdown of the ozone layer using chlorine as a free radical?
What is the overall equation for the breakdown of the ozone layer?
a compound containing only hydrogen and carbon
•IP3 is the water soluble part (hydrophilic) of PIP2 and travels through the cytosol to stimulate Calcium release from ER. It interacts with its receptor (ITPR) in the membrane of the ER which allows the release of Ca2+ into the cytosol It also promotes Ca2+ influx from extracellular fluid by a mechanism that is less clear Increase in intracellular Ca2+ promoted cellular responses by it binding to calmodulin
a way to separate liquids from a mixture of liquids by boiling off the substances at different temperatures, then condensing and collecting the liquids
What are some every day uses of endothermic reactions?
a substance that has had oxygen added to it/ or has lost electrons
a formula that represents the common structure of all compounds in a single class of chemicals. For example, the general formula of all alkanes is CnH2n+2
when some elements or compounds are mixed together and intermingle but do not react together (i.e. no new substance is made). A mixture is not a pure substance
describes a hydrocarbon with only single bonds between its carbon atoms. This means that it contains as many hydrogen atoms as possible in each molecule
what is the word equation for the reaction in a fuel cell
a hydrocarbon whose molecules contains at least one carbon- carbon double bond
the resistance of a liquid to flowing or pouring; a liquid's 'thickness'
Some polymers are disposed of by incineration. Ignoring any economic considerations, explain why incineration is not a suitable method for the disposal of poly(chloroethene). (2)
This is a question about catalytic converters in car exhaust systems. When petrol is burnt in a car engine, pollutant gases including carbon monoxide and nitrogen monoxide are formed.(i) Write the equation for the reaction between these two polluting gases that takes place on the surface of a catalytic converter. State symbols are not required.

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