Related Questions

A drug that is highly effective in treating many types of infection can,at present,be obtained only from the bark of the ibora , a tree that is quite rare in the wild. It takes the bark of 5000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibore's extinction. Which of the following,if true, most seriously weakens the arguments above ?
A The drug made from the ibora bark is dispensed to doctors from a central authority
B The drug made from the ibora bark is expensive to produce
C The leaves of the ibora are used in a number of medical products
D The ibora can be propagated from cuttings and grown under cultivation
Drug absorption is influenced by
A Polarity of the drug
B Dose of the drug
C Dosage formulation of the drug
D pKa of the drug
E Plasma half-life of the drug
Bioavailability of a drug may be decreased if the drug is
A Water soluble
B Protein in nature
C Ionized
D Acid stable
E Lipid soluble
Following subcutaneous injection of a drug into a healthy young adult, dilatation of the pupil and a rise in systolic blood pressure are produced. The drug could be
A Acting by stimulating  and  receptors
B Acting by blocking sympathetic ganglia
C Atropine
D Adrenaline
E Morphine
Through cell membrane, which substances can pass more easily than others?
A Peptides soluble
B Nucleic acids soluble
C Cellulose soluble
D Lipid soluble
Inthe cell membrane
A Integral proteins may give attachment to filaments.
B The inner side shows the hydrophobic ends of the lipid molecules.
C The inner protein layer is discontinuous.
D Receptors are destroyed after being used.
E The outer protein layer is continuous.
Following antibiotics acts by inhibiting cell membrane function
A Colistin
B Nystatin
C Vancomycin
D Linozolid
E Cotrimoxazole
Which is not a function of the cell membrane?
A helps substances pass from the cytoplasm into the nucleus
B keeps materials within the cell separated from the environment outside the cell
C helps control the movement of materials into and out of the cell
D allows the cell to change shape under pressure
By which process substance like carbon dioxide or oxygen can move across the cell membrane?
A Plasmolysis
B Sedimentation
C Diffusion
D Transpiration
Out of proteins, lipids and carbohydrates present in a cell membrane, what is true?
A Lipids are maximum
B Carbohydrates are minimum
C Carbohydrates are maximum
D All three are in equal proportion

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