In what respect do prontosil and Salvarsan resemble? Is there any resemblance between azo dye and prontosil? Explain.
Both prontosil and Salvarsan and antibacterial drugs (antimicrobials) discovered by Paul Ehrlich. Salvarsan is also known as arsphenamine. It is an organoarsenic molecule and has -As = As- double bond.
Salvarsan and prontosil show similarity in their structure. Both of these drugs are antimicrobials. Salvarsan contains -As = As- linkage whereas prontosil has -N = N- linkage.
Assertion (A): Receptor proteins show selectivity for one chemical messenger over the other.
Reason (R): Chemical messenger binds to the receptor site and inhibits its natural function.
Assertion (A): Artificial sweeteners are added to the food to control the intake of calories.
Reason (R): Most of the artificial sweeteners are inert and do not metabolise in the body.
Between sodium hydrogen carbonate and magnesium hydroxide which is a better antacid and why?
Name two ct-amino acids which form a dipeptide which is 100 times more sweet than cane sugar?
While antacids and antiallergic drugs interfere with the function of histamines, why do these not interfere with the function of each other?
Draw the diagram showing micelle formation by the following detergent. CH3(CH2)10CH2O SO3– Na+.
How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?
Sodium salts of some acids are Very useful as food preservatives. Suggest a few such acids.
With refrence to which classification has the statement "ranitidine is an antacid", been given?
Which of the following are antidepressants?
(a) Iproniazid (b) Phenelzine (c) Equanil (d) Salvarsan
Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.
Assertion (A): All chemicals added to food items are called food preservatives.
Reason (R): All these chemicals increase the nutritive value of the food.
Assertion (A): Preservative are added to food items.
Reason (R): Preservatives inhibit the growth of microorganisms.
With refrence to which classification has the statement "ranitidine is an antacid", been given?
Which of the following are anionic detergents?
(a) Sodium salts of sulphonated long chain alcohol.
(b) Ester of stearic acid and polyethylene glycol.
(c) Quaternary ammonium salt of amine with acetate ion.
(d) Sodium salts of sulphonated long chain hydrocarbons.
What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?
Synthetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimized? Classify the detergents according to their chemical nature.
Which of the following statements are incorrect about receptor proteins?
(a) Majority of receptor proteins are embedded in the cell membranes.
(b) The active site of receptor proteins opens on the inside region of the cell.
(c) Chemical messengers are received at the binding sites of receptor proteins.
(d) Shape of receptor does not change during attachment of messenger.
Which of the following are sulpha drugs?
(a) Sulphapyridine (b) Prontosil
(c) Salvarsan (d) Nardil
Assertion (A): Sulpha drug contain sulphonamide group.
Reason (R): Salvarsan is a sulpha drug.
Assertion (A): Chemical messenger gives message to the cell without entering the cell.
Reason (R): Chemical messenger is received at the binding site of receptor proteins.
Which of the following compounds are administered as ant-acids?
(a) Sodium carbonate (b)Sodium Hydrogen carbonate
(c)Aluminium carbonate (d)Magnism Hydroxide
Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days low chloride drinks are more popular, why?
If soap has high alkali content it’irritates skin. How can the amount of excess alkali be determined? What can be the source of excess alkali?