Description : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried
Last Answer : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than ... B. electrorefining C. Zone refining D. POILING
Description : The technique for purification of proteins that can be made specific for a given protein is (A) Gel filtration chromotography (B) Ion exchange chromatography (C) Electrophoresis (D) Affinity chromatography
Last Answer : Answer : D
Description : Purification of petroleum is carried out by which method? -General Knowledge
Last Answer : The answer is 'Fractional distillation'
Last Answer : answer:
Description : 54 Pick up the correct statement from the following: A. The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor B. The automatic purification of polluted ... phenomenon C. The photosynthesis is carried out in the presence of sun light D. All the above
Last Answer : ANS: D
Description : The re-isolation and purification of penicillin was carried out by a. Waksman. b. Florey and Chain. c. Domagk. d. Fleming.
Last Answer : b. Florey and Chain.
Description : Assertion `:-` Low concentration of oxygen allow dissociation of oxyhaemoglobin. Reason `:-` CO has more affinity with Haemoglobin as compares to oxyg
Last Answer : Assertion `:-` Low concentration of oxygen allow dissociation of oxyhaemoglobin. Reason `:-` CO has more ... D. If both Assertion & Reason are false.
Description : The factor responsible for purification of sewage in river is A. Hydrology B. Dissolved oxygen in water C. Temperature D. All the above
Description : Stirred-tank bioreactors have been designed for (a) addition of preservatives to the product (b) purification of the product (c) ensuring anaerobic conditions in the culture vessel (d) availability of oxygen throughout the process.
Last Answer : (d) availability of oxygen throughout the process.
Description : Stirred-tank bioreactors have been designed for (a) purification of product (b) addition of preservatives to the product (c) availability of oxygen throughout the process (d) ensuring anaerobic conditions in the culture vessel.
Last Answer : (c) availability of oxygen throughout the process
Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Reverse osmosis is normally used for the (A) Separation of isotopes of uranium from gaseous uranium hexafluoride (B) Separation of helium from natural gas (C) Desalination of brackish water to produce potable (drinking) water (D) Purification of oxygen
Last Answer : (C) Desalination of brackish water to produce potable (drinking) water
Description : Presence of carbonaceous matter in the sewage (A) Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures (B) Reduces sulphate ions to sulphides causing obnoxious ... quantity of chlorine used for its purification (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Van Arkel method of purification of metals involves converting the metal to
Last Answer : Van Arkel method of purification of metals involves converting the metal to A. Volatile ... stable compound D. non-volatile unstable compound
Last Answer : Van Arkel method of purification of metals involves converting the metal to A. Volatile stable ... . Volatile unstable compound D. None of these
Description : In which of the following method of purification metal is converted to its volatile compound which is decomposed to give pure metal?
Last Answer : In which of the following method of purification metal is converted to its volatile compound ... Heating with iodine C. Liquidation D. Distillation
Description : Ultra purification of a metal is done by (1) slugging (2) zone melting (3) smelting (4) leaching
Last Answer : (2) zone melting Explanation: When metals are required in a ultra pure state, the zone refining method is used. The principleemployed states that the impurities, which lower the melting point of ... remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase.
Description : Ultra purification of a Metal is done by–
Last Answer : Zone Melting
Description : Ultra purification of a metal is done by : (1) slugging (2) zone melting (3) smelting (4) leaching
Last Answer : zone melting
Description : Metronidazole is selectively active against anaerobic organisms because: A. Aerobes have an active transport mechanism to pump it out of their cell B. Only anaerobes reduce it to generate the reactive ... inactivated in the presence of oxygen D. It binds to DNA of anaerobes with high affinity
Last Answer : B. Only anaerobes reduce it to generate the reactive nitro radical
Description : Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen? -Do You Know?
Description : Assertion `:-` Haemoglobin can not get saturated with oxygen more than `97%`. Reason `:-` With a rise in `PO_(2)`, the affinity between `O_(2)` & haem
Last Answer : Assertion `:-` Haemoglobin can not get saturated with oxygen more than `97%`. Reason `:-` With a ... False. D. If both Assertion & Reason are false.
Description : Carbon monoxide has greater affinity for haemoglobin as compared to oxygen :
Last Answer : Carbon monoxide has greater affinity for haemoglobin as compared to oxygen : A. 1000 Times B. 200 Times C. 20Times D. 2 Times
Description : Statement -1 `Al_(2)O_(3)` is converted in to Al by reductin with carbon at high temp.statement -2: Carbon has grater affinity for oxygen than alumium
Last Answer : Statement -1 `Al_(2)O_(3)` is converted in to Al by reductin with carbon at high temp. ... -2: Carbon has grater affinity for oxygen than alumium .
Description : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have equal affinity for oxygen.
Last Answer : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have ... 500^(@)C` D. `1200^(@)C`
Description : 2, 3-Biphosphoglycerate in high concentrations, combines with hemoglobin, causes (A) Displacement of the oxyhemoglobin dissociation curve to the left (B) Displacement of the oxyhemoglobin dissociation curve ... (C) No change in oxy hemoglobin dissociation curve (D) Increased affinity for oxygen
Last Answer : Answer : B
Description : In children the lungs are pale pink due to (a) Rich blood supply (b) Greater binding affinity of haemoglobin for oxygen (c) Formation of a higher percentage of oxyhaemoglobin as per higher metabolic rate (d) All of them
Last Answer : Ans:(a)
Description : Haemoglobin has highest affinity for – (1) Oxygen (2) Carbon dioxide (3) Carbon monoxide (4) Nitrogen
Last Answer : (1) Oxygen Explanation: Haemoglobin has greatest affinity for oxygen with which it binds readily. The oxygen binding properties of hemoglobin exist because of the interaction between oxygen and the iron atom of the heme groups and hemoglobin's quaternary structure.
Description : Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen?
Last Answer : 200 times
Description : The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by (a) 200 times (b) 1000 times (c) 2 times (d) 20 times.
Last Answer : (a) 200 times
Description : The haemoglobin of a human fetus (a) has only 2 protein subunits instead of 4 (b) has a higher affinity for oxygen than that of an adult (c) has a lower affinity for oxygen than that of the adult (d) its affinity for oxygen is the same as that of an adult.
Last Answer : (b) has a higher affinity for oxygen than that of an adult
Description : Reduction in pH of blood will (a) decrease the affinity of haemoglobin with oxygen (b) release bicarbonate ions by the liver (c) reduce the rate of heartbeat (d) reduce the blood supply to the brain.
Last Answer : (a) decrease the affinity of haemoglobin with oxygen
Description : Roots of which plant contains a red pigment which have affinity for oxygen? (a) Carrot (b) Soybean (c) Mustard (d) Radish
Last Answer : (b) Soybean
Description : List the following atoms in order of increasing electron affinity: oxygen, boron, and fluorine.
Last Answer : ANSWER: (1) BORON, (2) OXYGEN, (3) FLUORINE
Description : Haemoglobin has highest affinity for (1) Oxygen (2) Carbon dioxide (3) Carbon monoxide (4) Nitrogen
Last Answer : Oxygen
Description : The sorting out of molecules according to size and shape may be adapted to protein purification in this technique: (A) Adsorption chromatography (B) Gel filtration chromatography (C) Paper chromatography (D) None of these
Description : Mammalian cells are not inhibited by low concentrations of tetracyclines that inhibit sensitive microorganisms because: A. Host cells lack active transport mechanism for tetracyclines B. Host cells actively pump out ... host cells has low affinity for tetracyclines D. Both A' and C' are correct
Last Answer : D. Both ‘A’ and ‘C’ are correct
Description : A specific fructokinase present in liver has a very high affinity for its substrate because (A) Km for fructose is very high (B) Km for fructose is very low (C) Activity is affected by fasting (D) Activity is affected by insulin
Description : When compared to unfractionated heparin, low molecular weight heparins have (a) Preferential binding affinity to factor Xa relative to Iia (thrombin) (b) Shorter half-lives (c) Dose – dependent renal clearance
Last Answer : Ans: A
Description : Aspirin in low doses produces longlasting inhibition (a) Platelets contain low quantity of COX (b) Platelets cannot synthesize fresh COX molecules (c) Platelets bind aspirin with high affinity (d) Platelet COX is inducible
Last Answer : Ans: B
Description : Methicillin resistant staphylococci do not respond to ß-lactam antibiotics because (a) They produce a ß-lactamase which destroys methicillin and related drugs (b) They elaborate an amidase which destroys ... low affinity for ß-lactam antibiotics (d) They are less permeable to ß-lactam antibiotics
Last Answer : Ans: C
Description : What are low affinity receptors ?
Last Answer : Low affinity receptors play role in regulating he intensity of IgE response.
Description : Electron affinity of noble gases is - (1) zero (2) Low (3) High (4) Very high
Last Answer : (1) zero Explanation: Most elements 'want' to have a complete electron shell with 8 electrons. Since the Noble Gases already have that 'perfect status' then they have an affinity of 0.
Description : Trimethoprim inhibits bacteria without affecting mammalian cells because: A. It does not penetrate mammalian cells B. It has high affinity for bacterial but low affinity for mammalian dihydrofolate ... bacterial folate synthetase as well as dihydrofolate reductase enzymes D. All of the above
Last Answer : B. It has high affinity for bacterial but low affinity for mammalian dihydrofolate reductase enzyme
Description : Methicillin resistant staphylococci do not respond to β-lactam antibiotics because: A. They produce a β-lactamase which destroys methicillin and related drugs B. They elaborate an amidase which destroys ... low affinity for β-lactam antibiotics D. They are less permeable to β-lactam antibiotics
Last Answer : C. They have acquired penicillin binding protein which has low affinity for β-lactam antibioti
Description : A partial agonist can antagonise the effects of a full agonist because it has: A. High affinity but low intrinsic activity B. Low affinity but high intrinsic activity C. No affinity and low intrinsic activity D. High affinity but no intrinsic activity
Last Answer : A. High affinity but low intrinsic activity
Description : What is true in relation to drug receptors: A. All drugs act through specific receptors B. All drug receptors are located on the surface of the target cells C. Agonists induce a conformational change in the receptor D. Partial agonists have low affinity for the receptor
Last Answer : C. Agonists induce a conformational change in the receptoR
Description : Aspirin in low doses produces longlasting inhibition of platelet cyclooxygenase (COX) because: A. Platelets contain low quantity of COX B. Platelets cannot synthesize fresh COX molecules C. Platelets bind aspirin with high affinity D. Platelet COX is inducible
Last Answer : B. Platelets cannot synthesize fresh COX molecules