What is meant by the term broad spectrum antibiotics? Explain.
Broad spectrum antibiotics are effective against several different types or wide range of harmful bacteria. For example, tetracycline, chloramphenicol and of loxacin. Chloramphenicol can be used in case of typhoid, dysentry, acute fever, urinary infections, meningitis and pneumonia.
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.
While antacids and antiallergic drugs interfere with the function of histamines, why do these not interfere with the function of each other?
Between sodium hydrogen carbonate and magnesium hydroxide which is a better antacid and why?
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.
With refrence to which classification has the statement "ranitidine is an antacid", been given?
Aspirin is pain relieving antipyretic drug but can be used to prevent heart attack. Explain.
Draw the diagram showing micelle formation by the following detergent. CH3(CH2)10CH2O SO3– Na+.
Name two ct-amino acids which form a dipeptide which is 100 times more sweet than cane sugar?
Which of the following are antidepressants?
(a) Iproniazid (b) Phenelzine (c) Equanil (d) Salvarsan
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 sulpha drugs?
(a) Sulphapyridine (b) Prontosil
(c) Salvarsan (d) Nardil
Which of the following compounds are administered as ant-acids?
(a) Sodium carbonate (b)Sodium Hydrogen carbonate
(c)Aluminium carbonate (d)Magnism Hydroxide
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.
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.
What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?
Assertion (A): Receptors are crucial to body's communication process. Reason (R): Receptors are proteins.
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.
Compounds with antiseptic properties are
(a) CHCl, (b) CHI3
(c) Boric acid (d) 0.3 ppm aqueous solution of Cl2
Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days low chloride drinks are more popular, why?
Assertion (A): Sulpha drug contain sulphonamide group.
Reason (R): Salvarsan is a sulpha drug.
Assertion (A): Competitive inhibitors compete with natural substrate for their attachment on the active sites of enzymes.
Reason (R): In competitive inhibition, inhibitor binds to the allosteric site of the enzyme.