Description : The striving of two or more individuals for the same object a). Allelopathy b). Competition c). Co-operation d). None of these
Last Answer : b). Competition
Description : The ecological phenomenon of plant-plant interference a). Competition b). Allelopathy c). Both d). None
Last Answer : c). Both
Description : Auto allelopathy existed in a). Wheat b). alfaalfa c). cowpea d). all
Last Answer : d). all
Description : The term, allelopathy came into exis tence in a). 1937 AD b). 500 BC c). 1974 AD d). 1832 AD
Last Answer : a). 1937 AD
Description : The term, allelopathy was given by a). Rice b). Molisch c). Decondole d). Democritus
Last Answer : b). Molisch
Description : .In functional allelopathy a). Toxic substances are released as such from the plants b). A precursor is released and is converted into active substances by some microorganisms c). No release of any toxic substance d). release of nitrogen from nodule of legume takes place
Last Answer : b). A precursor is released and is converted into active substances by some microorganisms
Description : Which crop exhibit direct allelopathy? a). Sorghum b). Maize c). Lentil d). Alfalfa
Last Answer : a). Sorghum
Description : . A crop has residual allelopathy on wheat a). Rice b). Lentil c). Maize d). Sorghum
Last Answer : b). Lentil
Description : .Which among the following crops ex hibits allo-allelopathy? a).Maize b). Sorghum c). Rye d). All
Last Answer : d). All
Description : Continuous cropping of which legume crop cause auto allelopathy? a). Chickpea b). Alfa-alfa c). Cowpea d). Pigeonpea
Last Answer : b). Alfa-alfa
Description : The term allelopathy was given by a). Rice (1974) b). Molisch (1937) c). Decondole (1832) d). Molisch (1930)
Last Answer : b). Molisch (1937)
Description : Hans Molish is associated with a). Competition b). Eutrophication c). Allelomediation d). Allelopathy
Last Answer : d). Allelopathy
Description : Methylxanthines exert the following action (s) at cellular/molecular level (a) Intracellular release of Ca2+ (b) Antagonism of adenosine (c) Inhibition of phosphodiesterase (d) All of the above
Last Answer : Ans: D
Description : Which of the following terms best describes the antagonism of leukotriene's bronchoconstrictor effect (mediated at leukotriene receptors) by terbutaline (acting a adrenoceptors) in a patient with ... ) Partial agonist (c) Physiologic antagonist (d) Chemical antagonist (e) Noncompetitive antagonist
Last Answer : Ans: C
Description : “Antagonism “ is seen in a. Lag phase b. Plasmids c. Log phase d. None of these
Description : Which type of antimicrobial drug combination is most likely to exhibit antagonism ? (a) Bactericidal + Bactericidal (b) Bactericidal + Bacteriostatic for a highly sensitive organism (c) Bactericidal + Bacteriostatic for a marginally sensitive organism (d) Bacteriostatic + Bacteriostatic
Last Answer : Ans: B
Description : Th effect or response produced by two or more chemicals are less than the sum of the effects or response that the chemical would produce individually is known as - (1) Antagonism (2) Independent (3) Additive (4) Synergism
Last Answer : (1) Antagonism Explanation: Synergy is the interaction of multiple elements in a system to produce an effect different from or greater than the sum of their individual effects. On the other hand, ... of two or more substances to produce an effect less than the sum of their individual effects.
Description : Eposure to mixtures of chemicals are greater than expected on the basis of effects of expo-sure to each chemical individually. This is known as – (1) Additives (2) Antagonism (3) Synergism (4) Independent
Last Answer : (3) Synergism Explanation: When the toxic effect of the mixture is greater than that expected for the sum of individual constituent doses, which is that effects of combined doses are more- ... less than that expected under the dose additivity assumption, the interactions are said to be antagonistic.
Description : Mycorrhiza exhibits the phenomenon of (a) parasitism (b) symbiosis (c) antagonism (d) endemism.
Last Answer : (b) symbiosis
Description : efficacy of an activator adjuvant is a function of a). Adjuvant only b). Herbicide only c). Both a&b d). Antagonism
Last Answer : c). Both a&b
Description : The following anti-HIV drug should not be combined with zidovudine because of mutual antagonism: A. Stavudine B. Lamivudine C. Nevirapine D. Ritonavir
Last Answer : A. Stavudine
Description : Which type of antimicrobial drug combination is most likely to exhibit antagonism: A. Bactericidal + Bactericidal B. Bactericidal + Bacteriostatic for a highly sensitive organism C. Bactericidal + Bacteriostatic for a marginally sensitive organism D. Bacteriostatic + Bacteriostatic
Last Answer : B. Bactericidal + Bacteriostatic for a highly sensitive organism
Description : Beneficial effects of β-adrenoceptor blockers in CHF include the following except: A. Antagonism of ventricular wall stress enhancing action of sympathetic overactivity B. Antagonism ... Prevention of pathological remodeling of ventricular myocardium D. Prevention of dangerous cardiac arrhythmias
Last Answer : B. Antagonism of vasoconstriction due to sympathetic overactivity
Description : The mechanisms involved in the causation of dangerous cardiac arrhythmias due to overdose of tricyclic antidepressants include the following except: A. Intraventricular conduction block B. Potentiation of noradrenaline C. Antagonism of acetylcholine D. Increased vagal tone
Last Answer : D. Increased vagal tone
Description : The primary mechanism of action of benzodiazepines is: A. Dopamine antagonism B. Adenosine antagonism C. Opening of neuronal chloride channels D. Facilitation of GABA-mediated chloride influx
Last Answer : D. Facilitation of GABA-mediated chloride influx
Description : The most important mechanism of antiinflammatory action of glucocorticoids is: A. Inhibition of lysosomal enzymes B. Restriction of recruitment of inflammatory cells at the site of inflammation C. Antagonism of action of interleukins D. Suppression of complement function
Last Answer : B. Restriction of recruitment of inflammatory cells at the site of inflammation
Description : 6.12 The most prominent action of bromocriptine is: A. Dopamine D2 agonism B. Dopamine D2 antagonism C. Dopamine D1 antagonism D. α adrenergic antagonism
Last Answer : A. Dopamine D2 agonism
Description : The antidotal action of sodium nitrite in cyanide poisoning is based on: A. Physical antagonism B. Chemical antagonism C. Physiological antagonism D. Noncompetitive antagonism
Last Answer : B. Chemical antagonism
Description : The antagonism between adrenaline and histamine is called ‘physiological antagonism’ because: A. Both are physiologically present in the body B. They act on physiological receptors C. Both affect many physiological processes D. They have opposite physiological effects
Last Answer : D. They have opposite physiological effects
Description : If the effect of combination of two drugs is equal to the sum of their individual effects, the two drugs are exhibiting: A. Potentiation B. Synergism C. Cross tolerance D. Antagonism
Last Answer : B. Synergism
Description : Drugs acting through receptors exhibit the following features except: A. Structural specificity B. High potency C. Competitive antagonism D. Dependence of action on lipophilicity
Last Answer : D. Dependence of action on lipophilicity
Description : Methylxanthines exert the following action(s) at cellular/molecular level: A. Intracellular release of Ca2+ B. Antagonism of adenosine C. Inhibition of phosphodiesterase D. All of the above
Last Answer : D. All of the above
Description : Benefit afforded by certain H1 antihistaminics in the following condition is not based on antagonism of histamine: A. Dermographism B. Insect bite C. Common cold D. Seasonal hay fever
Last Answer : C. Common cold
Description : The effect or response produced by two or more chemicals are less than the sum of the effects or response that the chemical would produce individually is known as (1) Antagonism (2) Independent (3) Additive (4) Synergism
Last Answer : Antagonism
Description : Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as (1) Additives (2) Antagonism (3) Synergism (4) Independent
Last Answer : Synergism
Description : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV radiations causes ozone depletion .
Last Answer : Which is correct about statements X and Y statement X. DDT shows biological magnification Statement Y : UV ... D. X is not correct, Y is correct.