Traditional Art                 
Pros                                                                              

• has been defined within the parameters of painting,drawing,sculpting, and architecture
• we refer to it as realist or figurative
• focuses on the figure and realism
• was based on human figure of landscape
• can also be like folk art

Cons

• the art has sometimes been altered
• some artists forged traditional materials
• some of the artwork went in neither category of painting of sculpture
• stayed with the tradition
• lead oxides may be used in some of the art

Modern Art
Pros

• abstraction is used 
• the artists feel free to trust their inner visions
• characterized by a large number of different movements occurring at the same time
•   resembles something in life
• can be just about anything the artist wants 

Cons

• there are no rules in modern art
• hard to explain the artwork
• the traditions have been thrown aside
• hard to find the meanings of the artwork
• they are not realistic

Gangadharpanth Gaitonde is the protagonist in the story, The Adventure written by Jayant Nirlikar. He has been portrayed as a professor of history. He is quite a passionate researcher and strong personality. He experiences a unique phenomenon. He meets with an accident and goes into a coma; during the time he is in coma, his consciousness experiences an experience of British India in which he sees a different Bombay. He also finds history to be changed in which India had never ever become slave to the British. He also finds that Marathas had defeated the troops of Abdali at Panipat.  

Later on Professor Rajendra Deshpande tries to give scientific explanation to this strange experience; but Gangadar Pant is not thoroughly convinced as many questions remain unanswered.

The hormone insulin provide a good example to explain the mode of human action through the extracellular receptors. The membrane bound receptor of insulin is a protein consisting of four subunits : the two a-subunits and two p-subunits. The following are the steps in this mechanism :
(a) Binding to the receptor : Insulin binds with the outer a-subunits of the receptor. This causes a structural change in the p-subunits, to become an activated kinase, which promotes phosphorylation.
(b) Second Messengers : The hormonal control of cell function is done through adenylate cyclase. The hormone receptor complex does not directly stimulates adenylate cyclase. It is done through a transducer G protein. The hormone receptor
complex induces the release of GDP from the G protein. It makes phosphatidylinositol which activates other processes.
© Amplification of signal : Mediates amplifier signals. The P-subunit activates DG and IP3 with second messenger. Some hormones use secondary messenger cAMP. Adenyl cyclase is amplifier. It changes Adenyl cyclase into ATP and then into cAMP. Adrenaline binds to receptors in liver or muscles cells which changes shape and binds to G protein. Then it binds to GTP and activates adenyl cyclase. This adrenaline releases 100 million moles of glucose (C5Hi2Ofi) in one or two minutes.

Gastrin is a local hormone.

• Facilitated diffusion is the passive transport of molecules along their concentration gradient across a biological membrane with the help of special proteins.
• The proteins form channels in the membrane for molecules to pass through.

Wurtz - Fitting reaction:
Aryl halide and alkyl halide couple in presence of sodium metal / dry ether to form alkyl benzene.
For example, bromobenzene reacts with methyl bromide in presence of sodium. dry ether to form toluene.
C_6​H_5​−Br+CH₃​−Br+2Na → C_6​H_5​−CH_3​ + 2NaBr

Certain haloalkanes can undergo elimination in two different ways giving a mixture of two products. In such reactions, the preferred product is the more highly substituted alkene (i.e. the alkene having lesser number of hydrogens on the doubly bonded carbon atoms). This generalisation is known as Saytzeff’s rule.

Friedel Crafts alkylation reaction can be explained as the alkylation of an aromatic ring using an alkyl halide in presence of a strong Lewis acid which acts as a catalyst. In the following given reaction, AlCl₃ is used as a catalyst and the aromatic ring taken is benzene.